Methods and compositions for the treatment of cardiopulmonary disorders
Patent Information
- Application Number
- EA202691308
- Authority / Receiving Office
- EA · EA
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2023-10-13
- Filing Date
- 2024-10-11
- Publication Date
- 2026-09-21
AI Technical Summary
Current therapies are inadequate for preventing, treating, and ameliorating cardiac tissue damage resulting from myocardial infarction, cardiac arrest, and other cardiovascular diseases, particularly in high-risk patients undergoing coronary artery bypass grafting (CABG) surgery.
Administration of a therapeutically effective amount of a compound of Formula (I) or its pharmaceutically acceptable salt, which is designed to reduce cardiac injury by targeting ischemia-reperfusion injury, myocardial infarction, and cardiac arrest, thereby protecting cardiac tissue and improving cardiovascular function.
The compound significantly reduces symptoms of cardiac injury such as arrhythmias, microvascular dysfunction, myocardial stunning, and myocyte death, while also decreasing reactive oxygen species production, Troponin I release, and oxidative stress in cardiomyocytes, ultimately leading to improved cardiac output and reduced indicators of cardiovascular disease.
Abstract
Description
METHODS AND COMPOSITIONS FOR TREATING CARDIO-PULMONARY DISORDERS
[0001] CROSS-REFERENCE TO RELATED APPLICATION
[0002] This application claims priority to PCT Application PCT / CN2023 / 124511, filed on October 13, 2023, the content of which is incorporated by reference in its entirety for all purposes.BACKGROUND
[0003] Coronary artery disease, the most common of the cardiovascular diseases, often leads to myocardial infarction or cardiac arrest, and is the leading cause of death in the United States. Thus, there is an urgent need for improved therapies to prevent, treat and / or ameliorate cardiac tissue damage resulting from myocardial infarction, cardiac arrest and other cardiovascular diseases and disorders. Coronary artery bypass grafting (CABG) has become the gold-standard treatment for coronary artery disease. While great progress has been made in surgical technique, which has improved survival rates, patients still suffer cardiac damage resulting from ischemia as the heart is isolated from systemic circulation, and reperfusion as circulation is restored (ischemia-reperfusion injury) . High-risk patients, with comorbidities such as hypertension, obesity and diabetes, are particularly vulnerable to this type of perioperative myocardial injury and infarction (PMI) . Despite the significant need to protect vulnerable patients from post-procedural cardiac damage and to treat cardiac damage resulting from myocardial infarction and other cardiovascular disorders or diseases, there are currently no approved therapies, with numerous compounds demonstrating lack of efficacy in clinical trials.
[0004] Additionally, the cardiovascular system has a complex and interwoven relationship the pulmonary system. Individuals with respiratory disorders often exhibit pulmonary vascular abnormalities. These abnormalities may include, but not limited to, fibrosis, pulmonary disease, sarcoidosis, neuromuscular or chest wall disorders, and disorders of ventilatory control. In particular, patients with an interstitial lung disease, such as idiopathic pulmonary fibrosis, have been shown to cause decreased quality of life and increased risk of death. Further, increased cardiac deaths have been observed in patients with systemic manifestations of lung disease. Accordingly, there remains a need to address the interconnected systems through small molecule therapy.
[0005] Hibernating mammals are a treasure trove of transient genetic resistance information whose state can be monitored with body temperature. They are able to completely prevent or reverse pathologies that closely resemble human diseases, including ischemia-reperfusion damage from heart attack. While in deep torpor, model hibernators such as ground squirrels have a heart rate at 1%of normal, and their body temperature drops to 4℃. At least 25 times during winter hibernation, they rapidly rewarm to 37℃ in just 2-3 hours; remarkably, heart rate increases 100-fold by the time core body temperature reaches just 7℃ (MacCannell et al., 2018) . This phenotype mimics an ischemia-reperfusion event similar to a heart attack or stroke, yet they are protected from the associated tissue damage. Studies show that when surgically simulating an ischemia-reperfusion event, winter squirrels are largely protected from damage compared to summer squirrels (reduced plasma levels of troponin I, myocardial apoptosis, and left ventricular contractile dysfunction) (Quinones et al., 2016) . Thus, studying hibernating animals can help identify potential therapeutic compounds to protect against and treat cardiac tissue.SUMMARY
[0006] The present disclosure includes a compound of Formula (I) :
[0007] or a pharmaceutically acceptable salt thereof
[0008] wherein
[0009] Ring A is selected from the group consisting of 4-7 membered monocyclic heterocyclyl ring having 1-3 ring heteroatoms each independently selected from the group consisting of nitrogen, oxygen, and sulfur, 7-10 membered bicyclic heterocyclyl ring having 1-3 ring heteroatoms each independently selected from the group consisting of nitrogen, oxygen, and sulfur, or a 5-6 membered heteroaryl ring wherein Ring A may be substituted by one, two, or three R3;
[0010] Ring B is 5-7 membered heterocyclyl ring containing 1-3 ring heteroatoms including the ring nitrogen to which it is attached, where the additional ring heteroatoms may each independently selected from the group consisting of nitrogen, oxygen, and sulfur, wherein Ring B may be substituted by one or two R2;
[0011] W is selected from the group consisting of -C (O) -, -C (O) O-, -C (O) N (H) -, -C (O) OCH2-, -C (O) N (H) CH2-, and 5-membered heteroaryl ring having 1-3 ring heteroatoms;
[0012] Z is CR1 or N;
[0013] R1 for each occurrence is independently selected from the group consisting of hydrogen, halogen, -OH, C1-C3 alkyl (optionally substituted with one, two or three halogens) , C3-7cycloalkyl; and 3-7 membered heterocyclyl ring containing 1-3 nitrogen atoms;
[0014] R2 for each occurrence is independently selected from hydrogen, halogen, C1-C3 alkyl (optionally substituted with one, two or three halogens) , -C (O) - (C1-C3 alkyl (optionally substituted with one, two or three halogens) ) , and -C (O) O- (C1-C3 alkyl (optionally substituted with one, two or three halogens) ) ;
[0015] R3 is independently for each occurrence selected from the group consisting of halogen, C1-C3 alkyl (optionally substituted with one, two or three halogens) , C3-7cycloalkyl, 4-6 membered monocyclic heterocyclyl ring having 1-3 ring heteroatoms each independently selected from the group consisting of nitrogen, oxygen, and sulfur (optionally substituted with one, two or three halogens) ; and
[0016] m is 1, 2, or 3.
[0017] In certain aspects, described herein are methods of treating, ameliorating or preventing cardiovascular disease, a cardiovascular disorder, or cardiac injury comprising:
[0018] administering to a subject in need thereof a therapeutically effective amount of a compound of the present disclosure. In certain embodiments, the cardiac injury is ischemia-reperfusion (I / R) injury. In certain embodiments, the ischemia-reperfusion injury is a result of myocardial infarction or ischemic stroke. In certain embodiments, the subject is at high risk of developing the disease or condition.
[0019] In some embodiments, a proposed of compound disclosed herein has no known connection to cardiac I-R injury. While further study into the mechanism of action is required for verification, the presently disclosed compounds are potentially a first in class drug for a large number of clinical applications where there is damage to cardiac tissue.
[0020] In certain embodiments, the cardiovascular disease or cardiovascular disorder, is selected from the group consisting of: arrhythmia, aorta disease, cardiomyopathy, congenital heart disease, coronary artery disease, deep vein thrombosis, heart valve disease, hypertension, Marfan syndrome, pericardial disease, pulmonary embolism, rheumatic heart disease, vascular disease, and drug induced cardiotoxicity. In certain embodiments, the subject is expected to undergo coronary artery bypass grafting (CABG) surgery. In certain embodiments, the subject has undergone CABG surgery.
[0021] In certain embodiments, following administration of a compound of the present disclosure, the subject has reduced symptoms selected from the group consisting of arrhythmias, microvascular dysfunction, myocardial stunning and myocyte death. In certain embodiments, wherein cardiomyocytes of the subject exhibit reduced reactive oxygen species production following administration of a compound of the present disclosure compared to cardiomyocytes prior to administration of a compound of the present disclosure or compared to control samples of cardiomyocytes. In certain embodiments, cardiomyocytes from the subject exhibit reduced release of Troponin I following administration of a compound of the present disclosure compared to cardiomyocytes or cardiac tissue prior to administration of a compound of the present disclosure or compared to control samples of cardiomyocytes or cardiac tissue from subjects that have not been administered a compound of the present disclosure. In certain embodiments, cardiomyocytes form the subject exhibit a cellular response selected from the group consisting of: reduced cell death, increased cell survival, decreased cell damage, and reduced oxidative stress, following administration of a compound of the present disclosure compared to cardiomyocytes prior to administration of a compound of the present disclosure or compared to control samples of cardiomyocytes, or cardiac tissue from subjects that have not been administered a compound of the present disclosure. In certain embodiments, administration of a compound of the present disclosure causes increased aortic velocity in the subject as compared to prior to administration of A compound of the present disclosure or subjects that have not been administered a compound of the present disclosure. In certain embodiments, administration of a compound of the present disclosure causes improved cardiac output in the subject as compared to prior to administration of A compound of the present disclosure or subjects that have not been administered a compound of the present disclosure. In certain embodiments, administration of a compound of the present disclosure causes a reduction of indicators of cardiovascular disease selected from the group consisting of: decreased collagen deposition, decreased fibroblast differentiation into myofibroblasts, increased or decreased expression of Smad Binding Elements (SBE) , increased cardiac contractile force generation or contractility, increased or enhanced maintenance of calcium handling, decreased hypertrophy (cell size) , and decreased expression of cardiac hypertrophic marker genes.
[0022] In certain aspects, described herein is a method of treating a subject that has undergone myocardial infarction or cardiac arrest, and is in need of treatment, comprising administering a sufficient amount of a compound of the present disclosure to the subject after the myocardial infarction or cardiac arrest. In certain embodiments, a compound of the present disclosure causes reduced infarct size in the heart tissue of the subject compared to a subject that was not administered a compound of the present disclosure after myocardial infarction or cardiac arrest. In certain embodiments, the a compound of the present disclosure causes reduced cardiac tissue wall thinning after the myocardial infarction or cardiac arrest. In certain embodiments, the a compound of the present disclosure causes reduced granulation of cardiac tissue after the myocardial infarction or cardiac arrest. In certain embodiments, the a compound of the present disclosure causes reduced neovascularization in cardiac tissue after the myocardial infarction or cardiac arrest. In certain embodiments, a compound of the present disclosure causes reduced neovascularization in cardiac tissue after the myocardial infarction or cardiac arrest. In certain embodiments, a compound of the present disclosure is administered in more than one dose. In certain embodiments, the effective amount is less than 300 ug / kg. In certain embodiments, the effective amount is 0.3-30 ug / kg. In certain embodiments, a compound of the present disclosure is administered in combination with at least one additional therapeutic agent.
[0023] A method of preventing or minimizing cardiac injury in a subject at risk of myocardial infarction or cardiac arrest, comprising administering to the subject an effective amount of a compound of the present disclosure before the myocardial infarction or cardiac arrest, thereby preventing or ameliorating cardiovascular damage. In certain embodiments, the subject at risk of myocardial infarction or cardiac arrest has a cardiovascular disease or condition selected from the group consisting of: arrhythmia, aorta disease, cardiomyopathy, congenital heart disease, coronary artery disease, deep vein thrombosis, heart valve disease, hypertension, Marfan syndrome, pericardial disease, pulmonary embolism, rheumatic heart disease, and vascular disease. In certain embodiments, a compound of the present disclosure is administered in more than one dose.
[0024] In certain aspects, described herein is a method of reducing cardiac damage in a subject resulting from coronary artery bypass grafting (CABG) surgery, comprising administering to the subject, before, after and / or during the surgery, a therapeutically effective amount of a compound of the present disclosure. In certain aspects, described herein is a method of reducing cardiac damage in a subject resulting cardiopulmonary bypass surgery, comprising administering to the subject, before, after and / or during the surgery, a therapeutically effective amount of a compound of the present disclosure. In certain embodiments, a compound of the present disclosure is administered in more than one dose. In certain embodiments, a compound of the present disclosure is administered prior to surgery, following surgery or both prior to and following surgery.
[0025] In certain aspects, described herein is a method of treating a subject with cardiac tissue damage, and is in need of treatment, comprising administering a sufficient amount of a compound of the present disclosure to the subject, thereby ameliorating the cardiac tissue damage. In certain embodiments, a compound of the present disclosure causes reduced neovascularization in the damaged cardiac tissue. In certain embodiments, a compound of the present disclosure is administered in combination with at least one additional therapeutic agent. In certain embodiments, the additional therapeutic agent is an agent selected from the group consisting of an agent that: reduces cholesterol, reduces low-density lipoprotein, reduces system blood pressure, and reduces blood glucose levels. In certain embodiments, the method increases overall survival rate of the subjects compared to subjects that have not been administered a compound of the present disclosure.
[0026] In certain aspects, described herein are pharmaceutical compositions formulated for a route of administration selected from the group consisting of: intravenous administration, intracardiac administration, and administration within a cardioplegic solution, comprising: a compound of the present disclosure and a pharmaceutically acceptable excipient.DETAILED DESCRIPTION
[0027] Definitions
[0028] “Treating” includes any effect, e.g., lessening, reducing, modulating, or eliminating, that results in the improvement of the condition, disease, disorder and the like.
[0029] The term “alkoxy” as used herein refers to a straight or branched alkyl group attached at oxygen (alkyl-O-) . Exemplary alkoxy groups include, but are not limited to, alkoxy groups of 1-6 or 2-6 carbon atoms, referred to herein as C1-C6 alkoxy, and C2-C6 alkoxy, respectively. Exemplary alkoxy groups include, but are not limited to methoxy, ethoxy, isopropoxy, etc.
[0030] The term “alkyl” as used herein refers to a saturated straight or branched hydrocarbon. Exemplary alkyl groups include, but are not limited to, straight or branched hydrocarbons of 1-6, 1-4, or 1-3 carbon atoms, referred to herein as C1-C6 alkyl, C1-C4 alkyl, and C1-C3 alkyl, respectively. Exemplary alkyl groups include, but are not limited to, methyl, ethyl, propyl, isopropyl, 2-methyl-1-butyl, 3-methyl-2-butyl, 2-methyl-1-pentyl, 3-methyl-1-pentyl, 4-methyl-1-pentyl, 2-methyl-2-pentyl, 3-methyl-2-pentyl, 4-methyl-2-pentyl, 2, 2-dimethyl-1-butyl, 3, 3-dimethyl-1-butyl, 2-ethyl-1-butyl, butyl, isobutyl, t-butyl, pentyl, isopentyl, neopentyl, hexyl, etc.
[0031] The term “cyano” as used herein refers to the radical -CN.
[0032] The terms “cycloalkyl” or a “carbocyclic group” as used herein refers to a saturated or partially unsaturated hydrocarbon group of, for example, 3-6, or 4-6 carbons, referred to herein as C3-C6 cycloalkyl or C4-C6 cycloalkyl, respectively. Exemplary cycloalkyl groups include, but are not limited to, cyclohexyl, cyclopentyl, cyclopentenyl, cyclobutyl or cyclopropyl.
[0033] The term “cycloalkylalkyl” as used herein refers to a saturated straight or branched hydrocarbon substituted with a saturated or partially unsaturated hydrocarbon group of, for example, 3-6, or 4-6 carbons.
[0034] The terms “halo” or “halogen” as used herein refer to F, Cl, Br, or I.
[0035] The terms “heterocyclyl” or “heterocyclic group” are art-recognized and refer to saturated or partially unsaturated, 4-10 membered ring structures, including bridged or fused rings, and whose ring structures include one to three heteroatoms, such as nitrogen, oxygen, and sulfur. Where possible, heterocyclyl rings may be linked to the adjacent radical through carbon or nitrogen. Examples of heterocyclyl groups include, but are not limited to, pyrrolidine, piperidine, morpholine, thiomorpholine, piperazine, oxetane, azetidine, tetrahydrofuran or dihydrofuran etc.
[0036] The terms “hydroxy” and “hydroxyl” as used herein refers to the radical -OH.
[0037] “Pharmaceutically or pharmacologically acceptable” include molecular entities and compositions that do not produce an adverse, allergic or other untoward reaction when administered to an animal, or a human, as appropriate. For human administration, preparations should meet sterility, pyrogenicity, and general safety and purity standards as required by FDA Office of Biologics standards.
[0038] The term “pharmaceutically acceptable carrier” or “pharmaceutically acceptable excipient” as used herein refers to any and all solvents, dispersion media, coatings, isotonic and absorption delaying agents, and the like, that are compatible with pharmaceutical administration. The use of such media and agents for pharmaceutically active substances is well known in the art. The compositions may also contain other active compounds providing supplemental, additional, or enhanced therapeutic functions.
[0039] The term “pharmaceutical composition” as used herein refers to a composition comprising at least one compound as disclosed herein formulated together with one or more pharmaceutically acceptable carriers.
[0040] “Individual, ” “patient, ” or “subject” are used interchangeably and include any animal, including mammals, preferably mice, rats, other rodents, rabbits, dogs, cats, swine, cattle, sheep, horses, or primates, and most preferably humans. The compounds of the invention can be administered to a mammal, such as a human, but can also be administered to other mammals such as an animal in need of veterinary treatment, e.g., domestic animals (e.g., dogs, cats, and the like) , farm animals (e.g., cows, sheep, pigs, horses, and the like) and laboratory animals (e.g., rats, mice, guinea pigs, and the like) . The mammal treated in the methods of the invention is desirably a mammal in which treatment of psychiatric disease or disorder is desired. “Modulation” includes antagonism (e.g., inhibition) , agonism, partial antagonism and / or partial agonism.
[0041] In the present specification, the term “therapeutically effective amount” means the amount of the subject compound that will elicit the biological or medical response of a tissue, system or animal, (e.g. mammal or human) that is being sought by the researcher, veterinarian, medical doctor or other clinician. The compounds of the invention are administered in therapeutically effective amounts to treat a disease. Alternatively, a therapeutically effective amount of a compound is the quantity required to achieve a desired therapeutic and / or prophylactic effect, such as an amount which results in a decrease in symptoms of a psychiatric disorder.
[0042] The term "pharmaceutically acceptable salt (s) " as used herein refers to salts of acidic or basic groups that may be present in compounds used in the compositions. Compounds included in the present compositions that are basic in nature are capable of forming a wide variety of salts with various inorganic and organic acids. The acids that may be used to prepare pharmaceutically acceptable acid addition salts of such basic compounds are those that form non-toxic acid addition salts, i.e., salts containing pharmacologically acceptable anions, including, but not limited to, malate, oxalate, chloride, bromide, iodide, nitrate, sulfate, bisulfate, phosphate, acid phosphate, isonicotinate, acetate, lactate, salicylate, citrate, tartrate, oleate, tannate, pantothenate, bitartrate, ascorbate, succinate, maleate, gentisinate, fumarate, gluconate, glucaronate, saccharate, formate, benzoate, glutamate, methanesulfonate, ethanesulfonate, benzenesulfonate, p-toluenesulfonate and pamoate (i.e., 1, 1'-methylene-bis- (2-hydroxy-3-naphthoate) ) salts. Compounds included in the present compositions that are acidic in nature are capable of forming base salts with various pharmacologically acceptable cations. Examples of such salts include alkali metal or alkaline earth metal salts, particularly calcium, magnesium, sodium, lithium, zinc, potassium, and iron salts. Compounds included in the present compositions that include a basic or acidic moiety may also form pharmaceutically acceptable salts with various amino acids. The compounds of the disclosure may contain both acidic and basic groups; for example, one amino and one carboxylic acid group. In such a case, the compound can exist as an acid addition salt, a zwitterion, or a base salt.
[0043] The compounds of the disclosure may contain one or more chiral centers and, therefore, exist as stereoisomers. The term “stereoisomers” when used herein consist of all enantiomers or diastereomers. These compounds may be designated by the symbols “ (+) , ” “ (-) , ” “R” or “S, ” depending on the configuration of substituents around the stereogenic carbon atom, but the skilled artisan will recognize that a structure may denote a chiral center implicitly. The present invention encompasses various stereoisomers of these compounds and mixtures thereof. Mixtures of enantiomers or diastereomers may be designated “ (±) ” in nomenclature, but the skilled artisan will recognize that a structure may denote a chiral center implicitly.
[0044] The compounds of the disclosure may contain one or more double bonds and, therefore, exist as geometric isomers resulting from the arrangement of substituents around a carbon-carbon double bond. The symbol denotes a bond that may be a single, double or triple bond as described herein. Substituents around a carbon-carbon double bond are designated as being in the “Z” or “E” configuration wherein the terms “Z” and “E” are used in accordance with IUPAC standards. Unless otherwise specified, structures depicting double bonds encompass both the “E” and “Z” isomers. Substituents around a carbon-carbon double bond alternatively can be referred to as “cis” or “trans, ” where “cis” represents substituents on the same side of the double bond and “trans” represents substituents on opposite sides of the double bond.
[0045] Compounds of the disclosure may contain a carbocyclic or heterocyclic ring and therefore, exist as geometric isomers resulting from the arrangement of substituents around the ring. The arrangement of substituents around a carbocyclic or heterocyclic ring are designated as being in the “Z” or “E” configuration wherein the terms “Z” and “E” are used in accordance with IUPAC standards. Unless otherwise specified, structures depicting carbocyclic or heterocyclic rings encompass both “Z” and “E” isomers. Substituents around a carbocyclic or heterocyclic rings may also be referred to as “cis” or “trans” , where the term “cis” represents substituents on the same side of the plane of the ring and the term “trans” represents substituents on opposite sides of the plane of the ring. Mixtures of compounds wherein the substituents are disposed on both the same and opposite sides of plane of the ring are designated “cis / trans. ”
[0046] Individual enantiomers and diasteriomers of compounds of the present invention can be prepared synthetically from commercially available starting materials that contain asymmetric or stereogenic centers, or by preparation of racemic mixtures followed by resolution methods well known to those of ordinary skill in the art. These methods of resolution are exemplified by (1) attachment of a mixture of enantiomers to a chiral auxiliary, separation of the resulting mixture of diastereomers by recrystallization or chromatography and liberation of the optically pure product from the auxiliary, (2) salt formation employing an optically active resolving agent, (3) direct separation of the mixture of optical enantiomers on chiral liquid chromatographic columns or (4) kinetic resolution using stereoselective chemical or enzymatic reagents. Racemic mixtures can also be resolved into their component enantiomers by well known methods, such as chiral-phase liquid chromatography or crystallizing the compound in a chiral solvent. Stereoselective syntheses, a chemical or enzymatic reaction in which a single reactant forms an unequal mixture of stereoisomers during the creation of a new stereocenter or during the transformation of a pre-existing one, are well known in the art. Stereoselective syntheses encompass both enantio-and diastereoselective transformations, and may involve the use of chiral auxiliaries. For examples, see Carreira and Kvaerno, Classics in Stereoselective Synthesis, Wiley-VCH: Weinheim, 2009.
[0047] The compounds disclosed herein can exist in solvated as well as unsolvated forms with pharmaceutically acceptable solvents such as water, ethanol, and the like, and it is intended that the invention embrace both solvated and unsolvated forms. In one embodiment, the compound is amorphous. In one embodiment, the compound is a single polymorph. In another embodiment, the compound is a mixture of polymorphs. In another embodiment, the compound is in a crystalline form.
[0048] The invention also embraces isotopically labeled compounds of the invention which are identical to those recited herein, except that one or more atoms are replaced by an atom having an atomic mass or mass number different from the atomic mass or mass number usually found in nature. Examples of isotopes that can be incorporated into compounds of the invention include isotopes of hydrogen, carbon, nitrogen, oxygen, phosphorus, sulfur, fluorine and chlorine, such as 2H, 3H, 13C, 14C, 15N, 18O, 17O, 31P, 32P, 35S, 18F, and 36Cl, respectively. For example, a compound of the invention may have one or more H atom replaced with deuterium.
[0049] Certain isotopically-labeled disclosed compounds (e.g., those labeled with 3H and 14C) are useful in compound and / or substrate tissue distribution assays. Tritiated (i.e., 3H) and carbon-14 (i.e., 14C) isotopes are particularly preferred for their ease of preparation and detectability. Further, substitution with heavier isotopes such as deuterium (i.e., 2H) may afford certain therapeutic advantages resulting from greater metabolic stability (e.g., increased in vivo half-life or reduced dosage requirements) and hence may be preferred in some circumstances. Isotopically labeled compounds of the invention can generally be prepared by following procedures analogous to those disclosed in the examples herein by substituting an isotopically labeled reagent for a non-isotopically labeled reagent.
[0050] Compounds
[0051] The present disclosure includes a compound of Formula (I) :
[0052] or a pharmaceutically acceptable salt thereof
[0053] wherein
[0054] Ring A is selected from the group consisting of 4-7 membered monocyclic heterocyclyl ring having 1-3 ring heteroatoms each independently selected from the group consisting of nitrogen, oxygen, and sulfur, 7-10 membered bicyclic heterocyclyl ring having 1-3 ring heteroatoms each independently selected from the group consisting of nitrogen, oxygen, and sulfur, or a 5-6 membered heteroaryl ring wherein Ring A may be substituted by one, two, or three R3;
[0055] Ring B is 5-7 membered heterocyclyl ring containing 1-3 ring heteroatoms including the ring nitrogen to which it is attached, where the additional ring heteroatoms may each independently selected from the group consisting of nitrogen, oxygen, and sulfur, wherein Ring B may be substituted by one or two R2;
[0056] W is selected from the group consisting of -C (O) -, -C (O) O-, -C (O) N (H) -, -C (O) OCH2-, -C (O) N (H) CH2-, and 5-membered heteroaryl ring having 1-3 ring heteroatoms;
[0057] Z is CR1 or N;
[0058] R1 for each occurrence is independently selected from the group consisting of hydrogen, halogen, -OH, C1-C3 alkyl (optionally substituted with one, two or three halogens) , C3-7cycloalkyl; and 3-7 membered heterocyclyl ring containing 1-3 nitrogen atoms;
[0059] R2 for each occurrence is independently selected from hydrogen, halogen, C1-C3 alkyl (optionally substituted with one, two or three halogens) , -C (O) - (C1-C3 alkyl (optionally substituted with one, two or three halogens) ) , and -C (O) O- (C1-C3 alkyl (optionally substituted with one, two or three halogens) ) ;
[0060] R3 is independently for each occurrence selected from the group consisting of halogen, C1-C3 alkyl (optionally substituted with one, two or three halogens) , C3-7cycloalkyl, 4-6 membered monocyclic heterocyclyl ring having 1-3 ring heteroatoms each independently selected from the group consisting of nitrogen, oxygen, and sulfur (optionally substituted with one, two or three halogens) ; and
[0061] m is 1, 2, or 3.
[0062] The present disclosure includes a compound of Formula (I-a) , (I-b) , (I-c) , or (I-d) :
[0063] or a pharmaceutical acceptable salt thereof.
[0064] wherein R1, R2, A, W, and m are defined herein.
[0065] In some embodiments, the present disclosure includes a compound of Formula (II)
[0066] or a pharmaceutically acceptable salt thereof
[0067] wherein
[0068] X is selected from the group consisting of -C (R”) 2-, -O-, and -N (H) -;
[0069] W is selected from the group consisting of -C (O) O-, -C (O) N (H) -, and a 5-membered heteroaryl ring having 1-3 ring heteroatoms;
[0070] R1 for each occurrence is independently hydrogen or halogen
[0071] R2 is hydrogen or C1-C3 alkyl;
[0072] R” for each occurrence is independently selected from hydrogen, halogen, and methyl;
[0073] m is 1, 2, or 3;
[0074] n is 0, 1, 2, or 3; and
[0075] p is 0, 1, 2, 3.
[0076] In some embodiments, the compound is of Formula (II-a)
[0077] or a pharmaceutically acceptable salt thereof.
[0078] In some embodiments, the compound is of Formula (II-a’)
[0079] or a pharmaceutically acceptable salt thereof,
[0080] wherein each R1 may be the same or different.
[0081] In some embodiments, the compound is of Formula (II-a”)
[0082] or a pharmaceutically acceptable salt thereof.
[0083] In some embodiments, the present disclosure includes a compound of Formula (II-b) :
[0084] or a pharmaceutically acceptable salt thereof.
[0085] In some embodiments, the present disclosure includes a compound of Formula (III) :
[0086] or a pharmaceutically acceptable salt thereof
[0087] wherein
[0088] X is selected from the group consisting of -C (R”) 2-, -O-, and -N (H) -;
[0089] W is selected from the group consisting of -C (O) O-, -C (O) N (H) -, and a 5-membered heteroaryl ring having 1-3 ring heteroatoms;
[0090] R1 for each occurrence is independently hydrogen or halogen
[0091] R2 is hydrogen or C1-C3 alkyl;
[0092] R3 is selected from the group consisting of hydrogen, halogen, and C1-C3 alkyl (optionally substituted with one, two or three halogens) ;
[0093] m is 1, 2, or 3;
[0094] n is 0, 1, 2, or 3; and
[0095] p is 0, 1, 2, 3.
[0096] In some embodiments, the present disclosure includes a compound of Formula (III-a) or Formula (III-b)
[0097] or a pharmaceutically acceptable salt thereof.
[0098] In some embodiments, the present disclosure includes a compound Formula (III-a’) or Formula (III-b’)
[0099] or a pharmaceutically acceptable salt thereof,
[0100] Ring A
[0101] In some embodiments, Ring A is selected from the group consisting of 4-7 membered monocyclic heterocyclyl ring having 1-3 ring heteroatoms each independently selected from the group consisting of nitrogen, oxygen, and sulfur, 7-10 membered bicyclic heterocyclyl ring having 1-3 ring heteroatoms each independently selected from the group consisting of nitrogen, oxygen, and sulfur, or a 5-6 membered heteroaryl ring wherein Ring A may be substituted by one, two, or three R3.
[0102] In some embodiments, Ring A is 4-7 membered monocyclic heterocyclyl ring having 1-3 ring heteroatoms each independently selected from the group consisting of nitrogen, oxygen, and sulfur, wherein Ring A may be substituted by one, two, or three R3. In some embodiments, Ring A is selected from the group consisting of azetidinyl, pyrrolidinyl, and piperidinyl, wherein Ring A may be substituted by one, two, or three R3. In some embodiments, Ring A is selected from the group consisting of
[0103] In some embodiments, Ring A is 7-10 membered bicyclic heterocyclyl ring having 1-3 ring heteroatoms each independently selected from the group consisting of nitrogen, oxygen, and sulfur, wherein Ring A may be substituted by one, two, or three R3. In some embodiments, Ring A is selected from the group consisting of bicyclo [2.2.2] heterocyclyl ring, bicyclo [4.4.0] heterocyclyl ring, bicyclo [3.3.1] heterocyclyl, bicyclo [2.2.1] heterocyclyl ring, bicyclo [3.2.1] heterocyclyl ring, quinuclidinyl, and 3-oxa-9-azabicyclo [3.3.1] nonanyl.
[0104] In some embodiments, Ring A is a 5-6 membered heteroaryl ring, wherein Ring A may be substituted by one, two, or three R3.
[0105] In some embodiments, wherein Ring A is selected from the group consisting of
[0106] In some embodiments, wherein Ring A is selected from the group consisting of
[0107] Ring B
[0108] In some embodiments, Ring B is 5-7 membered heterocyclyl ring containing 1-3 ring heteroatoms including the ring nitrogen to which it is attached, where the additional ring heteroatoms may each independently selected from the group consisting of nitrogen, oxygen, and sulfur, wherein Ring B may be substituted by one or two R2. In some embodiments, Ring B is 5-membered heterocyclyl ring containing 1-3 ring heteroatoms including the ring nitrogen to which it is attached, where the additional ring heteroatoms may each independently selected from the group consisting of nitrogen, oxygen, and sulfur, wherein Ring B may be substituted by one or two R2. In some embodiments, Ring B is 6-membered heterocyclyl ring containing 1-3 ring heteroatoms including the ring nitrogen to which it is attached, where the additional ring heteroatoms may each independently selected from the group consisting of nitrogen, oxygen, and sulfur, wherein Ring B may be substituted by one or two R2. In some embodiments, Ring B is 7-membered heterocyclyl ring containing 1-3 ring heteroatoms including the ring nitrogen to which it is attached, where the additional ring heteroatoms may each independently selected from the group consisting of nitrogen, oxygen, and sulfur, wherein Ring B may be substituted by one or two R2.
[0109] In some embodiments Ring B is selected from the group consisting of
[0110] In some embodiments, Ring B is 6-membered heterocyclyl ring containing 1-3 ring heteroatoms including the ring nitrogen to which it is attached, where the additional ring heteroatoms may each independently selected from the group consisting of nitrogen, oxygen, and sulfur, wherein Ring B may be substituted by one or two R2. In some embodiments, Ring B is 6-membered heterocyclyl ring containing 2 ring heteroatoms including the ring nitrogen to which it is attached, where the additional ring heteroatoms is nitrogen, wherein Ring B may be substituted by one or two R2.
[0111] In some embodiments, Ring B is 7-membered heterocyclyl ring containing 1-3 ring heteroatoms including the ring nitrogen to which it is attached, where the additional ring heteroatoms may each independently selected from the group consisting of nitrogen, oxygen, and sulfur, wherein Ring B may be substituted by one or two R2.
[0112] W
[0113] In some embodiments, W is selected from the group consisting of -C (O) -, -C (O) O-, -C (O) N (H) -, -C (O) OCH2-, -C (O) N (H) CH2-, and 5-membered heteroaryl ring having 1-3 ring heteroatoms. In some embodiments, W is -C (O) -. In some embodiments, W is -C (O) O-. In some embodiments, W is -C (O) N (H) -. In some embodiments, W is -C (O) OCH2-. In some embodiments, W is -C (O) N (H) CH2-. In some embodiments, W is 5-membered heteroaryl ring having 1-3 ring heteroatoms. In some embodiments, W is selected from the group consisting of pyrrolyl, pyrazolyl, imidazolyl, triazolyl, furanyl, oxazolyl, isoxazolyl, oxadiazolyl, thiophenyl, thiazolyl, isothiazolyl, and thiadiazolyl. In some embodiments, W is oxadiazole.
[0114] R1
[0115] In some embodiments, R1 for each occurrence is independently selected from the group consisting of hydrogen, halogen, -OH, C1-C3 alkyl (optionally substituted with one, two or three halogens) , C3-7cycloalkyl; and 3-7 membered heterocyclyl ring containing 1-3 nitrogen atoms. In some embodiments R1 is hydrogen or halogen. In some embodiments, R1 is C1-C3 alkyl. In some embodiments, R1 is methyl. In some embodiments, R1 is trifluoromethyl. In some embodiments, R1 is fluoro.
[0116] R2
[0117] In some embodiments, R2 for each occurrence is independently selected from hydrogen, halogen, C1-C3 alkyl (optionally substituted with one, two or three halogens) , -C (O) - (C1-C3 alkyl (optionally substituted with one, two or three halogens) ) , and -C (O) O- (C1-C3 alkyl (optionally substituted with one, two or three halogens) ) . In some embodiments, R2 is C1-C3 alkyl. ) ) . In some embodiments, R2 is methyl. In some embodiments, R2 is hydrogen.
[0118] R3
[0119] In some embodiments, R3 is independently for each occurrence selected from the group consisting of halogen, C1-C3 alkyl (optionally substituted with one, two or three halogens) , C3-7cycloalkyl, 4-6 membered monocyclic heterocyclyl ring having 1-3 ring heteroatoms each independently selected from the group consisting of nitrogen, oxygen, and sulfur (optionally substituted with one, two or three halogens) . In some embodiments, R3 is halogen. In some embodiments, R3 is C1-C3 alkyl (optionally substituted with one, two or three halogens) . In some embodiments, R3 is C3-7cycloalkyl. In some embodiments, R3 is 4-6 membered monocyclic heterocyclyl ring having 1-3 ring heteroatoms each independently selected from the group consisting of nitrogen, oxygen, and sulfur (optionally substituted with one, two or three halogens) .
[0120] In some embodiments, the present disclosure includes a compound of Table 1 or a pharmaceutically acceptable salt thereof.
[0121] Table 1
[0122] Diseases, Disorders and Injuries
[0123] Cardiovascular diseases, cardiovascular disorders, and / or cardiac injury are ameliorated, prevented and / or treated by the methods described herein. In certain embodiments, the cardiovascular disease or cardiovascular disorder is selected from the group consisting of: arrhythmia, aorta disease, cardiomyopathy, congenital heart disease, coronary artery disease, deep vein thrombosis, heart valve disease, hypertension, ischemic stroke, Marfan syndrome, pericardial disease, pulmonary embolism, rheumatic heart disease, vascular disease, and drug induced cardiotoxicity. In certain embodiments, cardiac tissue damage resulting from a cardiovascular surgery or procedure (e.g., coronary artery bypass grafting (CABG) surgery or cardiopulmonary bypass surgery) are ameliorated, prevented and / or treated by the methods described herein.
[0124] In certain embodiments, cardiac injury or cardiac tissue damage resulting from ischemia-reperfusion injury are ameliorated, prevented and / or treated by the methods described herein. In certain embodiments, cardiac injuries or cardiac tissue damage resulting from one or more events including, but not limited to, myocardial infarction, cardiac arrest or ischemic stroke are ameliorated, prevented and / or treated by the methods described herein.
[0125] In certain embodiments, cardiac injury or cardiac tissue damage resulting from cardiotoxicity or cardiomyopathy are ameliorated, prevented and / or treated by the methods described herein. In certain embodiments, the cardiotoxicity is caused by a chemical or toxin (e.g., chemotherapy such as anthracyclines, adverse effects of heavy metals, abuse of stimulants such as cocaine, alcohol abuse and incorrectly administered bupivacaine) . In certain embodiments, the cardiotoxicity is caused by infection (e.g., viral or bacterial) , by starvation (e.g., anorexia nervosa) , diabetes, high blood pressure, thyroid disease (e.g., hypothyroidism) , Thiamine or Vitamin B deficiency, and genetic defects which cause cardiomyopathy. In certain embodiments, a compound of the present disclosure is administered to a subject when one or more symptoms of cardiotoxicity or cardiomyopathy are present in the subject, including, but not limited to, an enlarged heart muscle, abnormal heart or lung sounds, swelling in hands, unusual weight gain, fatigue, chronic cough, shortness of breath and / or congestive heart failure.
[0126] In certain embodiments, a disease or disorder ameliorated, prevented and / or treated by the methods described herein is selected from the group consisting of: pulmonary artery hypertension, asthma, chronic obstructive pulmonary disease, pulmonary fibrosis (e.g., idiopathic pulmonary fibrosis, cystic fibrosis) , a coronavirus infection (e.g., SARS-COV2 infection) , acute lung injury, respiratory distress syndrome, respiratory failure, small cell lung cancer, interstitial lung disease, chronic obstructive pulmonary disease, and chronic thromboembolic pulmonary hypertension. In some embodiments, a disease or disorder ameliorated, prevented and / or treated by the methods described herein is chronic thromboembolic pulmonary hypertension.
[0127] In certain embodiments, a disease or disorder ameliorated, prevented and / or treated by the methods described herein is fibrosis. Fibrosis in the lung is a process that occurs in the interstitium. Pulmonary fibrosis can be localized, segmental, lobar, or affect the entirety of the lung (s) . In some embodiments, a disease is pulmonary fibrosis. In some embodiments, a condition associated with pulmonary fibrosis that is meliorated, prevented and / or treated by the methods described herein is selected from the group consisting of significant acute insult to the lungs, adult respiratory distress syndrome from a significant pulmonary infection, post COVID fibrosis (especially in patients admitted to ICU and needing intubation / ventilation) , and diffuse alveolar damage from any source.
[0128] In some embodiments, a condition associated with pulmonary fibrosis that is meliorated, prevented and / or treated by the methods described herein is a condition as a results of inhaled substances. In some embodiments, an inhaled substance is coal / silica (progressive massive fibrosis) or asbestos (asbestos-related pulmonary fibrosis) . In some embodiments, pulmonary fibrosis is radiation-induced pulmonary fibrosis. In some embodiments, pulmonary fibrosis is congenital. In some embodiments congenital fibrosis is cystic fibrosis or Hermansky-Pudlak syndrome. In some embodiments, pulmonary fibrosis is an autoimmune condition. In some embodiments, pulmonary fibrosis is a connective tissue disorder. In some embodiments, pulmonary fibrosis is a granulomatous condition. In some embodiments, a granulomatous condition is selected from the group consisting of sarcoidosis, tuberculosis and granulomatosis. In some embodiments, pulmonary fibrosis is airway-centered interstitial fibrosis. In some embodiments, pulmonary fibrosis is chronic. In some embodiments, fibrosis is chronic hypersensitivity pneumonitis or chronic eosinophilic pneumonia. In some embodiments, pulmonary fibrosis is polymyalgia rheumatica. In some embodiments, pulmonary fibrosis is a drug-induced lung disease. In some embodiments, pulmonary fibrosis includes emphysema. In some embodiments, pulmonary fibrosis includes one or more atelectasis-related pulmonary conditions.
[0129] In some embodiments, a disease or disorder ameliorated, prevented and / or treated by the methods described herein is an autoimmune disease with pulmonary involvement. In some embodiments, an autoimmune disease with pulmonary involvement is selected from the group consisting of systemic sclerosis, sjogrens syndrome, sarcoidosis, and amyloidosis.
[0130] In some embodiments, a disease or disorder ameliorated, prevented and / or treated by the methods described herein is a B-Cell related pulmonary lung disorder.
[0131] Methods of Treating, Ameliorating or Preventing Cardiac Injury
[0132] Described herein are methods of ameliorating, preventing and / or treating cardiovascular diseases, cardiovascular disorders, and / or cardiac injuries comprising administering to a subject in need thereof a therapeutically effective amount of a compound of the present disclosure. In certain embodiments, described herein are methods of treating a subject that has undergone myocardial infarction or cardiac arrest, and is in need of treatment, comprising administering a sufficient amount of a compound of the present disclosure to the subject after the myocardial infarction or cardiac arrest. In certain embodiments, described herein are methods of preventing or minimizing cardiac injury in a subject at risk of myocardial infarction or cardiac arrest, comprising administering to the subject an effective amount of a compound of the present disclosure before the myocardial infarction or cardiac arrest, thereby preventing or ameliorating cardiovascular damage. In certain embodiments, described herein are methods of reducing cardiac damage in a subject resulting from coronary artery bypass grafting (CABG) surgery, comprising administering to the subject, before, after and / or during the surgery, a therapeutically effective amount of a compound of the present disclosure. In certain embodiments, a compound of the present disclosure is administered prior to CABG surgery, following CABG surgery or both prior to and following CABG surgery. In certain embodiments, described herein are methods of reducing cardiac damage in a subject resulting from cardiopulmonary bypass comprising administering to the subject a therapeutically effective amount of a compound of the present disclosure before, after and / or during the surgery.
[0133] In certain aspects, described herein are methods of preventing cardiac injury in a subject at risk of myocardial infarction or cardiac arrest, comprising: administering to the subject an effective amount of a compound of the present disclosure before the myocardial infarction or cardiac arrest, thereby preventing or ameliorating cardiovascular damage. In certain embodiments, the subject at risk of myocardial infarction or cardiac arrest has a cardiovascular disease or condition selected from the group consisting of: arrhythmia, aorta disease, cardiomyopathy, congenital heart disease, coronary artery disease, deep vein thrombosis, heart valve disease, hypertension, Marfan syndrome, pericardial disease, pulmonary embolism, rheumatic heart disease, and vascular disease. In certain embodiments, the subject has a disorder or disease associated with increased risk of cardiac disease such as, but not limited to, hypertension, elevated cholesterol, obesity, diabetes, substance abuse, and tobacco use. In certain embodiments, the subject has a family history of heart disease and / or has a higher risk of developing a cardiac disease due to factors such as, but not limited to, age, race, gender, diet, substance abuse, physical activity, stress and / or depression.
[0134] In certain embodiments of the methods described herein, a compound of the present disclosure is administered to the subject by a route selected from the group consisting of: intravenous administration, intracardiac administration, and administration within a cardioplegic solution.
[0135] Unless stated otherwise, the term “subject” includes any mammalian animal, including but not limited to both humans and non-humans and include, but is not limited to humans, non-human primates, canines, felines, murines, bovines, equines, and porcines.
[0136] Described herein are methods of ameliorating, preventing and / or treating pulmonary diseases, pulmonary disorders, and / or pulmonary injuries comprising administering to a subject in need thereof a therapeutically effective amount of a compound of the present disclosure.
[0137] In some embodiments, pulmonary disease or disorder is selected from the group consisting of pulmonary artery hypertension PAH, asthma, chronic obstructive pulmonary disease COPD, pulmonary fibrosis (e.g., idiopathic pulmonary fibrosis IPF, cystic fibrosis) , a coronavirus infection (e.g., SARS-COV2 infection) , acute lung injury, respiratory distress syndrome, respiratory failure, small cell lung cancer, interstitial lung disease, chronic obstructive pulmonary disease, and chronic thromboembolic pulmonary hypertension.
[0138] In some embodiments, a pulmonary disease or disorder is an obstructive lung disease or a restrictive lung disease. In some embodiments, a pulmonary disease or disorder is selected from the group consisting of asthma, bronchiolitis obliterans organizing pneumonia (BOOP) , chronic obstructive pulmonary disease (COPD) , emphysema, pulmonary fibrosis, and sarcoidosis. In some embodiments, a pulmonary disease or disorder is selected from the group consisting of acute chest syndrome, acute respiratory distress syndrome, alpha-1 antitrypsin deficiency, asbestosis, aspergillosis, asthma, bronchiectasis, bronchiolitis, bronchiolitis obliterans, bronchitis, bronchopulmonary dysplasia, chronic cough, chronic obstructive pulmonary disease (COPD) , coccidioidomycosis, cryptogenic organizing pneumonia, cystic fibrosis, e-cigarette, or vaping product, use associated lung injury (EVALI) , emphysema, eosinophilic granulomatosis with polyangiitis (EGPA) , common cold, hantavirus pulmonary syndrome (HPS) , histoplasmosis, human metapneumovirus (hMPV) , hypersensitivity pneumonitis, idiopathic pulmonary fibrosis (IPF) , infectious lung diseases, influenza, interstitial lung disease (ILD) , Legionnaires' disease, lung cancer, LAM, MAC lung disease, mesothelioma, NTM lung disease, an occupational lung disease, pertussis, pneumonia, pneumothorax, primary ciliary dyskinesia (PCD) , pulmonary arterial hypertension (PAH) , pulmonary embolism, pulmonary fibrosis, pulmonary hypertension, respiratory syncytial virus, sarcoidosis, silicosis, sleep apnea, coronavirus related disease, and tuberculosis.
[0139] In some embodiments a pulmonary disorder is bronchitis. In some embodiments, bronchitis is acute bronchitis or chronic bronchitis.
[0140] In some embodiments, a pulmonary disease or disorder is selected from the group consisting of aspergillosis, asthma, bronchiectasis, bronchitis, chronic cough, chronic obstructive pulmonary disease (COPD) , common cold, croup, cystic fibrosis, hantavirus pulmonary syndrome (HPS) , idiopathic pulmonary fibrosis (IPF) , influenza, lung cancer, LAM, MAC lung disease, pertussis, pleurisy, pneumonia, pulmonary embolism, pulmonary hypertension, respiratory syncytial virus, sarcoidosis, sleep apnea, spirometry, sudden infant death syndrome, tobacco endgame, and tuberculosis.
[0141] Therapeutic Improvement Resulting From a compound of the present disclosure Treatment
[0142] In certain embodiments, following administration of one or more doses of a compound of the present disclosure by the methods described herein, the subject has reduced symptoms cardiac injury including, but not limited to, arrhythmias, microvascular dysfunction, myocardial stunning and myocyte death. In certain embodiments, cardiomyocytes of the subject exhibit reduced reactive oxygen species production following administration of a compound of the present disclosure compared to cardiomyocytes prior to administration of a compound of the present disclosure or compared to control samples of cardiomyocytes. In certain embodiments, the cardiomyocytes of the subject exhibit reduced release of Troponin I following administration of a compound of the present disclosure compared to cardiomyocytes or cardiac tissue prior to administration of a compound of the present disclosure or compared to control samples of cardiomyocytes or cardiac tissue from subjects that have not been administered a compound of the present disclosure. In certain embodiments, the cardiomyocytes of the subject exhibit a cellular response selected from the group consisting of: reduced cell death, increased cell survival, decreased cell damage, and reduced oxidative stress, following administration of a compound of the present disclosure compared to cardiomyocytes prior to administration of a compound of the present disclosure or compared to control samples of cardiomyocytes, or cardiac tissue from subjects that have not been administered a compound of the present disclosure. Any method known in the art to detect the described cellular responses either in vivo or ex vivo can be used.
[0143] In certain embodiments, the methods described herein cause increased aortic velocity in the subject as compared to prior to administration of a compound of the present disclosure or subjects that have not been administered a compound of the present disclosure. In certain embodiments, the methods described herein cause improved cardiac output in the subject as compared to prior to administration of a compound of the present disclosure or subjects that have not been administered a compound of the present disclosure. Any method known in the art to detect aspects of cardiac functioning (e.g., aortic velocity or cardiac output) can be used. In certain embodiments, administration of a compound of the present disclosure according to methods described herein causes improvement in cardiac functioning as demonstrated by modifications in parameters such as, but not limited to, fractional shortening, left ventricle ejection fraction (LVEF) , left ventricle end diastolic dimensions (LVEDD) , left ventricle end systolic dimensions (LVESD) , left ventricle end systolic volume (LVESV) , left ventricle end diastolic volume (LVEDV) , and stroke volume.
[0144] In certain embodiments, the methods described herein cause a reduction of indicators of cardiovascular disease and / or injury selected from the group consisting of: decreased collagen deposition, decreased fibroblast differentiation into myofibroblasts, increased or decreased expression of Smad Binding Elements (SBE) , increased cardiac contractile force generation or contractility, increased or enhanced maintenance of calcium handling, decreased hypertrophy (cell size) , decreased expression of cardiac hypertrophic marker genes, decreased apoptosis, decreased markers of angiogenesis, and decreased troponin I.
[0145] In certain embodiments, the methods described herein cause reduced cardiac tissue wall thinning (e.g., anterior wall thickening or posterior wall thickening) after myocardial infarction or cardiac arrest. In certain embodiments, the methods described herein cause reduced granulation of cardiac tissue after myocardial infarction or cardiac arrest. In certain embodiments, the methods described herein cause improved organization of the cardiac tissue after myocardial infarction or cardiac arrest. In certain embodiments, a compound of the present disclosure causes reduced neovascularization in cardiac tissue after myocardial infarction or cardiac arrest. In certain embodiments, the methods described herein cause reduced neovascularization in cardiac tissue after myocardial infarction or cardiac arrest.
[0146] In certain embodiments, the methods described herein result in reduced risk of myocardial infarction or cardiac arrest of the subjects compared to subjects that have not been administered a compound of the present disclosure. In certain embodiments, for subject having undergone at least one prior myocardial infarction or cardiac arrest, the methods described herein result in reduced risk of a subsequent myocardial infarction or cardiac arrest of the subjects compared to subjects that have not been administered a compound of the present disclosure. In certain embodiments, the methods described herein result in increased overall survival of the subjects compared to subjects that have not been administered a compound of the present disclosure.
[0147] Additional Therapeutic Compounds
[0148] In certain embodiments, the methods disclosed herein comprise administering a compound of the present disclosure in combination with at least one additional therapeutic agent. In certain embodiments, the additional therapeutic agent is an agent used to lower blood pressure (e.g., an angiotensin-converting enzyme (ACE) inhibitor, an angiotensin II receptor inhibitor, or a vasodilator, such as isosorbide dinitrate) , an agent used to reduce heart rate or modify cardiac output (e.g., a Beta-blocker) , a cholesterol-lowering medication (e.g., a statin) , a calcium channel blocker, a diuretic (e.g., hydrochlorthiazide) , an anti-coagulant, an anti-platelet agent, and / or an agent used to prevent or reduce the occurrence and severity of heart damage caused by drug induced cardiotoxicity (e.g., dexrazoxane hydrochloride) .
[0149] In certain embodiments, the additional therapeutic agent is administered concurrently with one or more doses of a compound of the present disclosure. In certain embodiments, the additional therapeutic agent is administered prior to one or more doses of a compound of the present disclosure. In certain embodiments, the additional therapeutic agent is administered after one or more doses of a compound of the present disclosure.
[0150] In certain embodiments, the additional therapeutic agent is one of a small molecule, a nucleic acid or a protein (e.g., an antibody) . In certain embodiments, the nucleic acid is RNA. In certain embodiments, the RNA is antisense RNA. In certain embodiments the RNA is shRNA. In certain embodiments, the therapeutic compound changes the expression of at least one gene target identified by a method described herein.
[0151] The term percent “identity, ” in the context of two or more nucleic acid or polypeptide sequences, refers to two or more sequences or subsequences that have a specified percentage of nucleotides or amino acid residues that are the same, when compared and aligned for maximum correspondence, as measured using one of the sequence comparison algorithms described below (e.g., BLASTP and BLASTN or other algorithms available to persons of skill) or by visual inspection. Depending on the application, the percent “identity” can exist over a region of the sequence being compared, e.g., over a functional domain, or, alternatively, exist over the full length of the two sequences to be compared.
[0152] For sequence comparison, typically one sequence acts as a reference sequence to which test sequences are compared. When using a sequence comparison algorithm, test and reference sequences are input into a computer, subsequence coordinates are designated, if necessary, and sequence algorithm program parameters are designated. The sequence comparison algorithm then calculates the percent sequence identity for the test sequence (s) relative to the reference sequence, based on the designated program parameters.
[0153] Optimal alignment of sequences for comparison can be conducted, e.g., by the local homology algorithm of Smith & Waterman, Adv. Appl. Math. 2: 482 (1981) , by the homology alignment algorithm of Needleman & Wunsch, J. Mol. Biol. 48: 443 (1970) , by the search for similarity method of Pearson & Lipman, Proc. Nat'l. Acad. Sci. USA 85: 2444 (1988) , by computerized implementations of these algorithms (GAP, BESTFIT, FASTA, and TFASTA in the Wisconsin Genetics Software Package, Genetics Computer Group, 575 Science Dr., Madison, Wis. ) , or by visual inspection (see generally Ausubel et al., infra) .
[0154] One example of an algorithm that is suitable for determining percent sequence identity and sequence similarity is the BLAST algorithm, which is described in Altschul et al., J. Mol. Biol. 215: 403-410 (1990) . Software for performing BLAST analyses is publicly available through the National Center for Biotechnology Information (www. ncbi. nlm. nih. gov / ) .
[0155] Pharmaceutical compositions
[0156] The therapeutic compounds described herein can be formulated in pharmaceutical compositions. These compositions can comprise, in addition to one or more of the therapeutic compounds, a pharmaceutically acceptable excipient, carrier, buffer, stabiliser or other materials well known to those skilled in the art. Such materials should be non-toxic and should not interfere with the efficacy of the active ingredient. The precise nature of the carrier or other material can depend on the route of administration, e.g. oral, intravenous, cutaneous or subcutaneous, nasal, intramuscular, intraperitoneal, intracardiac routes and administration within a cardioplegic solution.
[0157] Pharmaceutical compositions for oral administration can be in tablet, capsule, powder or liquid form. A tablet can include a solid carrier such as gelatin or an adjuvant. Liquid pharmaceutical compositions generally include a liquid carrier such as water, petroleum, animal or vegetable oils, mineral oil or synthetic oil. Physiological saline solution, dextrose or other saccharide solution or glycols such as ethylene glycol, propylene glycol or polyethylene glycol can be included.
[0158] For intravenous, cutaneous or subcutaneous injection, or injection at the site of affliction, the active ingredient will be in the form of a parenterally acceptable aqueous solution which is pyrogen-free and has suitable pH, isotonicity and stability. Those of relevant skill in the art are well able to prepare suitable solutions using, for example, isotonic vehicles such as Sodium Chloride Injection, Ringer's Injection, Lactated Ringer's Injection. Preservatives, stabilizers, buffers, antioxidants and / or other additives can be included, as required.
[0159] Therapeutic compounds comprising nucleic acids can be formulated by any method known in the art including, but not limited to, formulation with polymeric nanoparticles (e.g., cationic polymers) , lipid nanoparticles, and / or other hydrophobic moieties (e.g., cholesterol) .
[0160] A polypeptide, antibody, nucleic acid, small molecule or other pharmaceutically useful compound according to the present disclosure that is to be given to an individual, administration is preferably in a “therapeutically effective amount” that is sufficient to show benefit to the individual. A “prophylactically effective amount” can also be administered, when sufficient to show benefit to the individual. The actual amount administered, and rate and time-course of administration, will depend on the nature and severity of protein aggregation disease being treated. Prescription of treatment, e.g. decisions on dosage etc., is within the responsibility of general practitioners and other medical doctors, and typically takes account of the disorder to be treated, the condition of the individual patient, the site of delivery, the method of administration and other factors known to practitioners. Examples of the techniques and protocols mentioned above can be found in Remington's Pharmaceutical Sciences, 16th edition, Osol, A. (ed) , 1980.
[0161] A composition can be administered alone or in combination with other treatments, either simultaneously or sequentially dependent upon the condition to be treated.
[0162] EXAMPLES
[0163] Below are examples of specific embodiments for carrying out the present invention. The examples are offered for illustrative purposes only, and are not intended to limit the scope of the present invention in any way. Efforts have been made to ensure accuracy with respect to numbers used (e.g., amounts, temperatures, etc. ) , but some experimental error and deviation should, of course, be allowed for.
[0164] The practice of the present invention will employ, unless otherwise indicated, conventional methods of protein chemistry, biochemistry, recombinant DNA techniques and pharmacology, within the skill of the art. Such techniques are explained fully in the literature. See, e.g., T.E. Creighton, Proteins: Structures and Molecular Properties (W.H. Freeman and Company, 1993) ; A.L. Lehninger, Biochemistry (Worth Publishers, Inc., current addition) ; Sambrook, et al., Molecular Cloning: A Laboratory Manual (2nd Edition, 1989) ; Methods In Enzymology (S. Colowick and N. Kaplan eds., Academic Press, Inc. ) ; Remington's Pharmaceutical Sciences, 18th Edition (Easton, Pennsylvania: Mack Publishing Company, 1990) ; Carey and Sundberg Advanced Organic Chemistry 3rd Ed. (Plenum Press) Vols A and B (1992) .
[0165] Example 1. Synthesis of I-1 & I-2
[0166] Step 1
[0167] To a solution of 2- (2-nitrophenyl) acetic acid (3.6 g, 0.02 mol) in EtOH (50 ml) stirred at 0℃ was added H2SO4 (4 mL) and the reaction mixture was stirred at 60 ℃ for 12 h. The reaction mixture was slowly poured into ice water (200 ml) and extracted with EA (100 mL x 3) . The organic layer was combined, washed with H2O (100 mL x 3) , and concentrated in vacuo to afford ethyl 2- (2-nitrophenyl) acetate (3.8 g, 91%) as a white solid.
[0168] MS (ESI) : mass calcd. for C10H11NO4, 209.07, m / z found 232.1 [M+Na] .
[0169] Step 2
[0170] To a solution of ethyl 2- (2-nitrophenyl) acetate (3.8 g, 0.018 mol) in EtOH (50 ml) was added Pd / C (100 mg) and the reaction mixture was stirred at 25 ℃ for 4 h under H2 balloon. The mixture was filtered through celite, and the filtrate was concentrated to afford ethyl 2- (2-aminophenyl) acetate (3.1 g, 95%) as a white solid.
[0171] MS (ESI) : mass calcd. for C10H13NO2, 179.09, m / z found 180.2 [M+H] +.
[0172] Step 3
[0173] To a solution of ethyl 2- (2-aminophenyl) acetate (2.2 g, 0.012 mol) , TEA (2.49 g, 0.025 mol) in THF (30 ml) was added 4-chlorobutanoyl chloride (2.43 g, 0.017 mol) at 0℃ and the reaction mixture was stirred at 25 ℃ for 4 h. The mixture was quenched with water (100 mL) , extracted with EA (100 mL x 3) . The organic layer was concentrated to afford the crude product which was purified by silica gel column chromatography (PE: EA = 3: 1) to give ethyl 2- (2- (4-chlorobutanamido) phenyl) acetate (3 g, 85%) as a white solid.
[0174] MS (ESI) : mass calcd. for C14H18ClNO3, 283.10, m / z found 284.4 [M+H] +.
[0175] Step 4
[0176] To a solution of ethyl 2- (2- (4-chlorobutanamido) phenyl) acetate (2.84 g, 10 mmol) in THF (40 ml) was added t-BuOK (3.36 g, 30 mmol) in THF (20 mL) at 25 ℃. The reaction mixture was stirred at 25 ℃ for 1 h. The mixture was quenched with water (200 mL) and extracted with EA (200 mL x 3) . The organic layer was concentrated to afford the crude product which was purified by silica gel column chromatography (PE: EA = 3: 1) to give ethyl 2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxylate (588 mg, 26%) as a white solid.
[0177] MS (ESI) : mass calcd. for C14H15NO2, 229.11, m / z found 230.1 [M+H] +.
[0178] Step 5
[0179] To a mixture of ethyl 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylate (300 mg, 1.30 mmol) in EtOH (15 mL) and H2O (5 mL) was added KOH (220.3 mg, 3.93 mmol) . The reaction mixture was stirred at 80℃ for 10 h. The reaction mixture was concentrated to remove EtOH and then adjusted to pH = 2 with 1M HCl. The mixture was diluted with water and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (200 mg, crude) as a white solid which was used directly for the next step.
[0180] MS (ESI) : mass calcd. for C12H11NO2, 201.08, m / z found 202.1 [M+H] +.
[0181] Step 6
[0182] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (100 mg, 0.50 mmol) , (3R) -1-azabicyclo [2.2.2] octan-3-amine (62.7 mg, 0.50 mmol) and DIEA (192.7 mg, 1.49 mmol) in DMF (10 mL) was added HATU (226.8 mg, 0.60 mmol) . After stirring at 20 ℃ for 6 h, the mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give a residue which was purified by prep-HPLC (Xbridge prep c18 10um OBD 19*150mm / WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate : 30 ml / min, wavelength: 214 / 254 nm) to give N- [ (3R) -1-azabicyclo [2.2.2] octan-3-yl] -1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxamide formate (64.6 mg, 42%) as a white solid.
[0183] MS (ESI) : mass calcd. for C19H23N3O, 309.18, m / z found 310.2 [M+H] +.
[0184] 1H NMR (400 MHz, DMSO-d6) δ 8.31 (s, 1H) , 7.89-7.87 (m, 1H) , 7.38-7.35 (m, 1H) , 7.23 (d, J = 8.0 Hz, 1H) , 7.15- 7.08 (m, 2H) , 4.13 -4.10 (m, 3H) , 3.39 (t, J = 12.0 Hz, 1H) , 3.28- 3.24 (m, 2H) , 3.13 -3.08 (m, 1H) , 2.97- 2.94 (m, 4H) , 2.62 -2.55 (m, 2H) , 2.08-1.98 (m, 2H) , 1.78- 1.76 (m, 2H) , 1.60 -1.54 (m, 1H) .
[0185] Step 7
[0186] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (100 mg, 0.50 mmol) , (3S) -1-azabicyclo [2.2.2] octan-3-amine (62.7 mg, 0.50 mmol) and DIEA (192.7 mg, 1.50 mmol) in DMF (10 mL) was added HATU (226.8 mg, 0.60 mmol) . The reaction mixture was stirred at 20 ℃ for 6 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give the crude product which was purified by prep-HPLC (Xbridge prep c18 10um OBD 19*150mm / WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate: 30 ml / min, wavelength: 214 / 254 nm) to give N- [ (3S) -1-azabicyclo [2.2.2] octan-3-yl] -1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxamide formate (75.6 mg, 49%) as a white solid.
[0187] MS (ESI) : mass calcd. for C19H23N3O, 309.18, m / z found 310.2 [M+H] +.
[0188] 1H NMR (400 MHz, DMSO-d6) δ 8.26 (s, 0.5H) , 7.89- 7.87 (m, 1H) , 7.38 -7.36 (m, 1H) , 7.23 (d, J = 8.0 Hz, 1H) , 7.15- 7.08 (m, 2H) , 4.17 -4.10 (m, 3H) , 3.39 (t, J = 12.0 Hz, 1H) , 3.26 (t, J = 8.0 Hz, 2H) , 3.15- 3.11 (m, 1H) , 3.03 -2.96 (m, 4H) , 2.63- 2.56 (m, 2H) , 2.12 -2.01 (m, 2H) , 1.81- 1.75 (m, 2H) , 1.64 -1.61 (m, 1H) .
[0189] Example 2. Synthesis of I-3 & I-4:
[0190] Experimental procedure:
[0191] Step 1
[0192] SOCl2 (2.4 g, 20 mmol) was added to (5-fluoro-2-nitrophenyl) acetic acid (2 g, 10 mmol) in EtOH (5 mL) and the reaction mixture was stirred at 80℃ for 2 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give a residue which was purified by column chromatography on silica gel eluted with PE / EtOAc (20: 1) to give ethyl 2- (5-fluoro-2-nitrophenyl) acetate (2 g, 83%) as a white solid.
[0193] MS (ESI) : mass calcd. for C10H10FNO4, 227.06, m / z found 228.1 [M+H] +.
[0194] Step 2
[0195] Pd / C (80 mg, 0.8 mmol) was added to ethyl 2- (5-fluoro-2-nitrophenyl) acetate (2 g, 8.8 mmol) in MeOH (20 mL) under N2 and the mixture was stirred at 25 ℃ for 2 h under H2. The mixture was filtered through celite and the filtrate was concentrated to afford ethyl 2- (2-amino-5-fluorophenyl) acetate (1.8 g, 93%) as a white solid.
[0196] MS (ESI) : mass calcd. for C10H12FNO2, 197.09, m / z found 198.1 [M+H] +.
[0197] Step 3
[0198] 4-chlorobutanoyl chloride (1.4 g, 9.7 mmol) was added to a mixture of ethyl 2- (2-amino-5-fluorophenyl) acetate (1.6 g, 8.1 mmol) and DIEA (3.2 g, 24.3 mmol) in THF (20 mL) . The mixture was stirred at 25 ℃ for 2 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give a residue which was purified by column chromatography on silica gel eluted with DCM / MeOH (20: 1) to give ethyl 2- [2- (4-chlorobutanamido) -5-fluorophenyl] acetate (2.4 g, 86%) as a white solid.
[0199] MS (ESI) : mass calcd. for C14H17ClFNO3, 301.09, m / z found 302.1 [M+H] +.
[0200] Step 4
[0201] Ethyl 2- [2- (4-chlorobutanamido) -5-fluorophenyl] acetate (200 mg, 0.66 mmol) in THF (2 mL) was added to a mixture of t-BuOK (160 mg, 1.66 mmol) in THF (2 mL) under N2. After stirring at 25 ℃ for 2 h, the mixture was diluted with water (20 mL) and extracted with EA (20 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give the crude product which was purified by silica gel column chromatography eluted with DCM / MeOH (10: 1) to give ethyl 7-fluoro-1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylate (100 mg, 51%) as a white solid.
[0202] MS (ESI) : mass calcd. for C14H14FNO2, 247.1, m / z found 248.1 [M+H] +.
[0203] Step 5
[0204] Sodium hydroxide (30 mg, 0.73 mmol) was added to ethyl 7-fluoro-1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylate (60 mg, 0.24 mmol) in DMSO (2 mL) and H2O (0.5 mL) . After stirring at 100℃ for 1 h, the mixture was adjusted to pH = 6-7 with 1M HCl (aq. ) . The mixture was diluted with water (10 mL) and extracted with EA (5 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give 7-fluoro-1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (50 mg, 80%) as a white solid.
[0205] MS (ESI) : mass calcd. for C12H10FNO2, 219.07, m / z found 220.1 [M+H] +.
[0206] Step 6
[0207] To a mixture of 7-fluoro-1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (100 mg, 0.46 mmol) , (3R) -1-azabicyclo [2.2.2] octan-3-amine (57.6 mg, 0.46 mmol) and DIEA (176.9 mg, 1.37 mmol) in DMF (10 mL) was added HATU (208.2 mg, 0.55 mmol) . After stirring at 20 ℃ for 6 h, the mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give a residue which was purified by prep-HPLC (Xbridge prep c18 10um OBD 19*150mm / WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate : 30 ml / min, wavelength: 214 / 254 nm) to give N- [ (3R) -1-azabicyclo [2.2.2] octan-3-yl] -7-fluoro-1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxamide formate (62.5 mg, 42%) as a white solid.
[0208] MS (ESI) : mass calcd. for C19H22FN3O, 327.17, m / z found 328.1 [M+H] +.
[0209] 1H NMR (400 MHz, DMSO-d6) δ 8.28 (s, 0.70 H) , 7.59 (dd, J = 12.0, 4.0 Hz, 1H) , 7.39 (dd, J = 12.0, 4.0 Hz, 1H) , 7.22 (d, J = 8.0 Hz, 1H) , 7.00- 6.95 (m, 1H) , 4.13 (t, J = 8.0 Hz, 3H) , 3.45 -3.34 (m, 1H) , 3.30- 3.25 (m, 2H) , 3.12 -3.08 (m, 1H) , 2.96- 2.90 (m, 4H) , 2.63 -2.54 (m, 2H) , 2.07- 1.97 (m, 2H) , 1.77 -1.73 (m, 2H) , 1.60- 1.54 (m, 1H) .
[0210] Step 7
[0211] To a mixture of 7-fluoro-1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (100 mg, 0.46 mmol) , (3S) -1-azabicyclo [2.2.2] octan-3-amine (57.6 mg, 0.46 mmol) and DIEA (176.9 mg, 1.37 mmol) in DMF (10 mL) was added HATU (208.2 mg, 0.55 mmol) . After stirring at 20 ℃ for 6 h, the mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give a residue which was purified by prep-HPLC (Xbridge prep c18 10um OBD 19*150mm / WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate : 30 ml / min, wavelength: 214 / 254 nm) to give N- [ (3S) -1-azabicyclo [2.2.2] octan-3-yl] -7-fluoro-1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxamide formate (55.6 mg, 36%) as a white solid.
[0212] MS (ESI) : mass calcd. for C19H22FN3O, 327.17, m / z found 328.1 [M+H] +.
[0213] 1H NMR (400 MHz, DMSO-d6) δ 8.32 (s, 0.70 H) , 7.59 (dd, J = 12.0, 4.0 Hz, 1H) , 7.39 (dd, J = 8.0, 4.0 Hz, 1H) , 7.25 (d, J = 4.0 Hz, 1H) , 7.00- 6.95 (m, 1H) , 4.14 -4.11 (m, 3H) , 3.44- 3.39 (m, 1H) , 3.30 -3.25 (m, 2H) , 3.13- 3.11 (m, 1H) , 2.99 -2.97 (m, 4H) , 2.62-2.55 (m, 2H) , 2.10- 1.99 (m, 2H) , 1.79 -1.77 (m, 2H) , 1.62- 1.57 (m, 1H) .
[0214] Example 3. Synthesis of I-5 & I-6:
[0215] Experimental procedure:
[0216] Step 1
[0217] To a mixture of ethyl 1H-indole-2-carboxylate (5 g, 26.43 mmol) in THF (60 mL) at 0 ℃ was added LiAlH4 (1.5 g, 39.64 mmol) and the reaction mixture was stirred for 3 h at 60 ℃. The reaction mixture was quenched with H2O (3 mL) and 15%NaOH (4.5 mL) . The mixture was filtered, the filtrate was diluted with water (200 mL) and extracted with EA (100 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give a residue which was purified by Flash Chromatography (PE / EA 100: 1→1: 1) to give (1H-indol-2-yl) methanol (3 g, 77%) as a yellow solid.
[0218] MS (ESI) : mass calcd. for C9H9NO, 147.07, m / z found 148.1 [M+H] +.
[0219] Step 2
[0220] To a mixture of 1H-indol-2-ylmethanol (1.1 g, 0.0075 mol) in DCM (20 mL) was added KOH (1.05 g, 0.019 mol) at 0 ℃ and the reaction mixture was stirred at 0 ℃ for 0.5 h. Ethenyldiphenylsulfanium trifluoromethanesulfonate (3.26 g, 0.0079 mol) was added. The reaction mixture was stirred at 20 ℃ for 12 h. The reaction mixture was concentrated under reduced pressure to give a residue which was purified by Flash Chromatography (PE / EA 100: 1→10: 1) to give 1H, 3H, 4H- [1, 4] oxazino [4, 3-a] indole (0.57 g, 41%) as a yellow solid.
[0221] MS (ESI) : mass calcd. for C11H11NO, 173.08, m / z found 174.1 [M+H] +.
[0222] Step 3
[0223] To a solution of 1H, 3H, 4H- [1, 4] oxazino [4, 3-a] indole (570 mg, 3.29 mmol) and TEA (399.6 mg, 3.95 mmol) in DCE (20 mL) was added TFAA (760.3 mg, 3.62 mmol) at 0 ℃ and the reaction mixture was stirred at 0 ℃ for 1 h. The mixture was diluted with water (100 mL) and extracted with DCM (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give a residue which was purified by Flash Chromatography (PE / EA 100: 1→2: 1) to give difluoromethyl 1H, 3H, 4H- [1, 4] oxazino [4, 3-a] indole-10-carbonyl fluoride (700 mg, 75%) as a yellow solid.
[0224] MS (ESI) : mass calcd. for C13H10F3NO2, 269.07, m / z found 270.0 [M+H] +.
[0225] Step 4
[0226] To a solution of difluoromethyl 1H, 3H, 4H- [1, 4] oxazino [4, 3-a] indole-10-carbonyl fluoride (700 mg, 2.59 mmol) in DMF (10 mL) were added NaH (373.0 mg, 15.54 mmol) and H2O (233.3 mg, 12.95 mmol) . The reaction mixture was stirred at 20℃ for 2 h. The mixture was diluted with water (100 mL) . and extracted with EA (50 mL) . The aqueous was adjusted to pH = 2 with 1N HCl and extracted with EA (50 mL x 2) . The combined organic layer was dried over Na2SO4, concentrated to get the residue. The residue was purified by reverse phase column (phase A: H2O; phase B: ACN, 5~100%) , fraction with MS signal of desired product was collected and concentrated to give 1H, 3H, 4H- [1, 4] oxazino [4, 3-a] indole-10-carboxylic acid (400 mg, 68%) as a yellow solid.
[0227] MS (ESI) : mass calcd. for C12H11NO3, 217.07, m / z found 218.1 [M+H] +.
[0228] Step 5
[0229] To a mixture of 1H, 3H, 4H- [1, 4] oxazino [4, 3-a] indole-10-carboxylic acid (50 mg, 0.23 mmol) , (3R) -1-azabicyclo [2.2.2] octan-3-amine (29.1 mg, 0.23 mmol) and DIEA (89.3 mg, 0.69 mmol) in DMF (5 mL) was added HATU (105.0 mg, 0.28 mmol) . After stirring at 20℃ for 6 h, the mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give a residue which was purified by prep-HPLC (Welch 10u C18 250 x 21.2 mm, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate : 25 ml / min, wavelength: 214 / 254 nm) to give N- [ (3R) -1-azabicyclo [2.2.2] octan-3-yl] -1H, 3H, 4H- [1, 4] oxazino [4, 3-a] indole-10-carboxamide (42.3 mg, 56%) as a white solid.
[0230] MS (ESI) : mass calcd. for C19H23N3O2, 325.18, m / z found 326.1 [M+H] +.
[0231] 1H NMR (400 MHz, DMSO-d6) δ 7.81- 7.78 (m, 1H) , 7.50 -7.47 (m, 1H) , 7.37 (d, J = 8.0 Hz, 1H) , 7.23- 7.19 (m, 2H) , 5.13 (s, 2H) , 4.13 (s, 4H) , 3.94 -3.92 (m, 1H) , 3.11- 2.85 (m, 2H) , 2.69 -2.65 (m, 4H) , 1.92- 1.80 (m, 2H) , 1.61 -1.55 (m, 2H) , 1.38- 1.32 (m, 1H) .
[0232] Step 6
[0233] To a mixture of 1H, 3H, 4H- [1, 4] oxazino [4, 3-a] indole-10-carboxylic acid (50 mg, 0.23 mmol) , (3S) -1-azabicyclo [2.2.2] octan-3-amine (29.1 mg, 0.23 mmol) and DIEA (89.3 mg, 0.69 mmol) in DMF (5 mL) was added HATU (105.0 mg, 0.28 mmol) . After stirring at 20℃ for 6 h, the mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give the crude product. The crude product was purified by prep-HPLC (Welch 10u C18 250 x 21.2 mm, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate : 25 ml / min, wavelength: 214 / 254 nm) to give N- [ (3S) -1-azabicyclo [2.2.2] octan-3-yl] -1H, 3H, 4H- [1, 4] oxazino [4, 3-a] indole-10-carboxamide (47.5 mg, 63%) as a white solid.
[0234] MS (ESI) : mass calcd. for C19H23N3O2, 325.18, m / z found 326.1 [M+H] +.
[0235] 1H NMR (400 MHz, DMSO-d6) δ 7.81- 7.78 (m, 1H) , 7.50 -7.46 (m, 1H) , 7.37 (d, J = 8.0 Hz, 1H) , 7.23- 7.19 (m, 2H) , 5.13 (s, 2H) , 4.13 (s, 4H) , 3.94 -3.92 (m, 1H) , 3.10- 2.84 (m, 2H) , 2.68 -2.61 (m, 4H) , 1.92- 1.81 (m, 2H) , 1.61 -1.52 (m, 2H) , 1.38- 1.32 (m, 1H) .
[0236] Example 4. Synthesis of I-8 to I-12:
[0237] Experimental procedure:
[0238] Step 1
[0239] To a solution of ethyl 1H-indole-2-carboxylate (20.0 g, 0.11 mol) in DMF (100 mL) was added sodium hydride (3.8 g, 0.16 mol) at 0℃. After stirring for 0.5 h, 2-bromoacetonitrile (25.4 g, 0.21 mol) was added and the reaction mixture temperature was stirred at room temperature for 6 h. The mixture was quenched with NH4Cl aqueous solution and extracted with EA (300 mL x 3) . The organic layer was washed with brine, dried with Na2SO4 and concentrated to give a residue which was purified by silica gel column chromatography (EA / PE=1 / 10) to afford ethyl 1- (cyanomethyl) indole-2-carboxylate (22 g, 91%) as a brown solid.
[0240] MS (ESI) : mass calcd. for C13H12N2O2, 228.09, m / z found 229.1 [M+H] +.
[0241] Step 2
[0242] To a solution of ethyl 1- (cyanomethyl) indole-2-carboxylate (10.0 g, 43.8 mmol) in THF (50 mL) was added LiAlH4 in THF (109.5 mL, 109.5 mmol) at 0 ℃ and the mixture was refluxed for 4 h. The mixture was quenched with water and filtered. The filtrate was concentrated to give crude 1H, 2H, 3H, 4H-pyrazino [1, 2-a] indole which was used for the next step without further purification.
[0243] MS (ESI) : mass calcd. C11H12N2, 172.10, m / z found 173.1 [M+H] +.
[0244] Step 3
[0245] A mixture of 1H, 2H, 3H, 4H-pyrazino [1, 2-a] indole (5.5 g, 32 mmol) , Boc2O (8.35 g, 38 mmol) and TEA (3.87 g, 38 mmol) in DCM (60 mL) was stirred at room temperature for 12 h. The mixture was diluted with water (200 mL) and extracted with DCM (100 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give a residue which was purified by flash chromatography (PE / EA=100 / 1 to 4 / 1) to give tert-butyl {1H, 3H, 4H-pyrazino [1, 2-a] indol-2-yl} formate (3.2 g, 35%) as a yellow solid.
[0246] MS (ESI) : mass calcd. for C16H20N2O2, 272.15, m / z found 273.2 [M+H] +.
[0247] Step 4
[0248] To a mixture of tert-butyl {1H, 3H, 4H-pyrazino [1, 2-a] indol-2-yl} formate (3.2 g, 12 mmol) and TEA (1.42 g, 14 mmol) in DCE (40 mL) was added TFAA (2.7 g, 12.8 mmol) at 0 ℃ and the reaction mixture was stirred at this temperature for 1 h. The mixture was diluted with water (200 mL) and extracted with DCM (100 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give a residue which was purified by Flash Chromatography (PE / EA=100 / 1 to 2 / 1) to give tert-butyl (10- { [ (difluoromethyl) -$l^ {2} -fluoranyl] carbonyl} -1H, 3H, 4H-pyrazino [1, 2-a] indol-2-yl) formate (3.5 g, 77%) as a yellow solid.
[0249] MS (ESI) : mass calcd. for C18H19F3N2O3, 368.13, m / z found 369.1 [M+H] +.
[0250] Step 5
[0251] A mixture of tert-butyl (10- { [ (difluoromethyl) -$l^ {2} -fluoranyl] carbonyl} -1H, 3H, 4H-pyrazino [1, 2-a] indol-2-yl) formate (3.5 g, 9.5 mmol) and NaOH (1.14 g, 28 mmol) in DMSO (20 mL) and H2O (20 mL) was stirred at 100 ℃ for 1 h. The mixture was then diluted with water (200 mL) and extracted with EA (100 mL) . The aqueous solution was acidified to pH = 2 with HCl (1N) and then extracted with EA (100 mL x 2) . The combined organic layer was dried over Na2SO4 and concentrated to give 2- (tert-butyl-$l^ {3} -oxy) -1H, 3H, 4H-pyrazino [1, 2-a] indole-10-carboxylic acid (1.7 g, crude) as a yellow solid which was directly used for the next step.
[0252] MS (ESI) : mass calcd. for C17H20N2O4, 316.14, m / z found 339.1 [M+Na] .
[0253] Step 6
[0254] To a mixture of 2- (tert-butyl-$l^ {3} -oxy) -1H, 3H, 4H-pyrazino [1, 2-a] indole-10-carboxylic acid (400 mg, 1.26 mmol) , (3R) -1-azabicyclo [2.2.2] octan-3-amine (159 mg, 1.26 mmol) and DIEA (489 mg, 3.78 mmol) in DMF (10 mL) was added HATU (575 mg, 1.51 mmol) and the reaction mixture was stirred at room temperature for 6 h. The reaction mixture was diluted with water (200 mL) and extracted with EA (100 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give a residue which was purified by Prep-HPLC (Xbridge prep c18 10um OBD 19*150mm / WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate: 30 ml / min, wavelength: 214 / 254 nm) to give (10- { [ (3R) -1-azabicyclo [2.2.2] octan-3-yl] carbamoyl} -1H, 3H, 4H-pyrazino [1, 2-a] indol-2-yl) tert-butyl formate (250 mg, 45%) as a white solid.
[0255] MS (ESI) : mass calcd. for C24H32N4O3, 424.25, m / z found 425.2 [M+H] +.
[0256] 1H NMR (400 MHz, DMSO-d6) δ 8.25 (s, 1H) , 7.82-7.78 (m, 1H) , 7.58 (d, J = 8.0 Hz, 1H) , 7.50-7.47 (m, 1H) , 7.23-7.18 (m, 2H) , 4.99 (s, 2H) , 4.17-4.14 (m, 2H) , 4.10-4.08 (m, 1H) , 3.88-3.85 (m, 2H) , 3.34-3.28 (m, 1H) , 3.04-3.02 (m, 1H) , 2.86- 2.84 (m, 4H) , 2.03-1.97 (m, 2H) , 1.75-1.71 (m, 2H) , 1.51-1.47 (m, 1H) , 1.44 (s, 9H) .
[0257] Step 7
[0258] To a solution of (10- { [ (3R) -1-azabicyclo [2.2.2] octan-3-yl] carbamoyl} -1H, 3H, 4H-pyrazino [1, 2-a] indol-2-yl) tert-butyl formate (200 mg, 0.47 mmol) in DCM (12 mL) was added TFA (4 mL) at 0 ℃ and the mixture was then stirred at room temperature for 2 h. The mixture was concentrated under reduced pressure to give a residue which was purified by prep-HPLC (Xbridge prep c18 10um OBD 19*150mm / WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate: 30 ml / min, wavelength: 214 / 254 nm) to give N- [ (3R) -1-azabicyclo [2.2.2] octan-3-yl] -1H, 2H, 3H, 4H-pyrazino [1, 2-a] indole-10-carboxamide formate (150 mg, 94%) as a yellow solid.
[0259] MS (ESI) : mass calcd. for C19H24N4O, 324.20, m / z found 325.2 [M+H] +.
[0260] 1H NMR (400 MHz, DMSO-d6) δ 9.29 (s, 1H) , 8.14 (s, 0.2H) , 7.88-7.83 (m, 2H) , 7.56-7.52 (m, 1H) , 7.28-7.23 (m, 2H) , 4.61 (s, 2H) , 4.33-4.20 (m, 3H) , 3.71-3.66 (m, 1H) , 3.61- 3.54 (m, 2H) , 3.39- 3.32 (m, 1H) , 3.26- 3.22 (m, 4H) , 2.26- 2.14 (m, 2H) , 1.94-1.90 (m, 2H) , 1.80-1.75 (m, 1H) .
[0261] Step 8
[0262] To a mixture of N- [ (3R) -1-azabicyclo [2.2.2] octan-3-yl] -1H, 2H, 3H, 4H-pyrazino [1, 2-a] indole-10-carboxamide (100 mg, 0.31 mmol) and TEA (94 mg, 0.92 mmol) in DCM (10 mL) was added acetyl chloride (24 mg, 0.31 mmol) at 0 ℃. The reaction mixture was stirred at room temperature for 2 h. The mixture was diluted with water (50 mL) and extracted with DCM (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure to give the crude product. The residue was purified by prep-HPLC (Xbridge prep c18 10um OBD 19*150mm / WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate: 30 ml / min, wavelength: 214 / 254 nm) to give 2-acetyl-N- [ (3R) -1-azabicyclo [2.2.2] octan-3-yl] -1H, 3H, 4H-pyrazino [1, 2-a] indole-10-carboxamide (22.8 mg, 20%) as a white solid.
[0263] MS (ESI) : mass calcd. for C21H26N4O2, 366.21, m / z found 367.2 [M+H] +.
[0264] 1H NMR (400 MHz, DMSO-d6) δ 7.81-7.77 (m, 1H) , 7.51-7.44 (m, 2H) , 7.23-7.18 (m, 2H) , 5.13-5.05 (m, 2H) , 4.24-4.12 (m, 2H) , 3.99-3.97 (m, 3H) , 3.15-3.10 (m, 1H) , 2.88-2.85 (m, 1H) , 2.69-2.66 (m, 4H) , 2.16-2.13 (m, 3H) , 1.93-1.86 (m, 2H) , 1.62-1.58 (m, 2H) , 1.37-1.35 (m, 1H) .
[0265] Step 9
[0266] To a mixture of 2- (tert-butyl-$l^ {3} -oxy) -1H, 3H, 4H-pyrazino [1, 2-a] indole-10-carboxylic acid (350 mg, 1.10 mmol) , (3S) -1-azabicyclo [2.2.2] octan-3-amine (139.2 mg, 1.10 mmol) and DIEA (428 mg, 3.31 mmol) in DMF (10 mL) was added HATU (503 mg, 1.32 mmol) . After stirring at room temperature for 6 h, the mixture was diluted with water (30 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give a residue which was purified by prep-HPLC (Xbridge prep c18 10um OBD 19*150mm / WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate: 30 ml / min, wavelength: 214 / 254 nm) to give (10- { [ (3S) -1-azabicyclo [2.2.2] octan-3-yl]carbamoyl} -1H, 3H, 4H-pyrazino [1, 2-a] indol-2-yl) tert-butyl formate (250 mg, 52%) as a white solid.
[0267] MS (ESI) : mass calcd. for C24H32N4O3, 424.25, m / z found 425.2 [M+H] +.
[0268] 1H NMR (400 MHz, DMSO-d6) δ 8.28 (s, 1H) , 7.82-7.78 (m, 1H) , 7.58 (d, J = 8.0 Hz, 1H) , 7.50-7.47 (m, 1H) , 7.23-7.18 (m, 2H) , 4.99 (s, 2H) , 4.17-4.14 (m, 2H) , 4.10-4.08 (m, 1H) , 3.88-3.85 (m, 2H) , 3.33-3.27 (m, 1H) , 3.03-3.01 (m, 1H) , 2.87-2.85 (m, 4H) , 2.03-1.96 (m, 2H) , 1.75-1.70 (m, 2H) , 1.50-1.47 (m, 1H) , 1.44 (s, 9H) .
[0269] Step 10
[0270] To a solution of (10- { [ (3S) -1-azabicyclo [2.2.2] octan-3-yl] carbamoyl} -1H, 3H, 4H-pyrazino [1, 2-a] indol-2-yl) tert-butyl formate (200 mg, 0.47 mmol) in DCM (12 mL) was added TFA (4 mL) at 0 ℃. After stirring at room temperature for 2h, the mixture was concentrated under reduced pressure to give a residue which was purified by prep-HPLC (Xbridge prep c18 10um OBD 19*150mm / WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate: 30 ml / min, wavelength: 214 / 254 nm) to give N- [ (3S) -1-azabicyclo [2.2.2] octan-3-yl] -1H, 2H, 3H, 4H-pyrazino [1, 2-a] indole-10-carboxamide (150 mg, 98%) as a yellow solid.
[0271] MS (ESI) : mass calcd. for C19H24N4O, 324.20, m / z found 325.2 [M+H] +.
[0272] 1H NMR (400 MHz, DMSO-d6) δ 7.79-7.75 (m, 1H) , 7.45-7.40 (m, 1H) , 7.30 (s, 1H) , 7.18-7.14 (m, 2H) , 4.27 (s, 2H) , 4.00-3.94 (m, 3H) , 3.56-3.54 (m, 1H) , 3.16-3.10 (m, 2H) , 2.91-2.85 (m, 1H) , 2.70-2.65 (m, 4H) , 1.92-1.85 (m, 2H) , 1.62-1.54 (m, 2H) , 1.40-1.34 (m, 1H) .
[0273] Step 11
[0274] To a mixture of N- [ (3S) -1-azabicyclo [2.2.2] octan-3-yl] -1H, 2H, 3H, 4H-pyrazino [1, 2-a] indole-10-carboxamide (100 mg, 0.31 mmol) and TEA (94 mg, 0.92 mmol) in DCM (10 mL) was added acetyl chloride (24 mg, 0.31 mmol) at 0 ℃ and the reaction mixture was stirred at room temperature for 2 h. The mixture was diluted with water (50 mL) and extracted with DCM (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure to give a residue was purified by prep-HPLC (Xbridge prep c18 10um OBD 19*150mm / WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate: 30 ml / min, wavelength: 214 / 254 nm) to give 2-acetyl-N- [ (3S) -1-azabicyclo [2.2.2] octan-3-yl] -1H, 3H, 4H-pyrazino [1, 2-a] indole-10-carboxamide formate (60.6 mg, 53%) as a white solid.
[0275] MS (ESI) : mass calcd. for C21H26N4O2, 366.21, m / z found 367.2 [M+H] +.
[0276] 1H NMR (400 MHz, DMSO-d6) δ 8.26 (s, 1H) , 7.83-7.79 (m, 1H) , 7.60-7.55 (m, 1H) , 7.51-7.48 (m, 1H) , 7.24-7.20 (m, 2H) , 5.13-5.05 (m, 2H) , 4.25-4.22 (m, 1H) , 4.13-4.07 (m, 2H) , 4.00-3.97 (m, 2H) , 3.31-3.25 (m, 1H) , 3.03-2.99 (m, 1H) , 2.85-2.83 (m, 4H) , 2.16-2.13 (m, 3H) , 2.04-1.95 (m, 2H) , 1.70-1.68 (m, 2H) , 1.51-1.48 (m, 1H) .
[0277] Example 5. Synthesis of I-13 &I-14:
[0278] Experimental procedure:
[0279] Step 1
[0280] To a solution of 2- (2-nitrophenyl) acetic acid (3.6 g, 0.02 mol) in EtOH (50 ml) stirred at 0 ℃ was added H2SO4 (4 mL) and the reaction mixture was stirred at 60 ℃ for 12 h. The reaction mixture was slowly poured into ice water (200 ml) and extracted with EA (100 mL x 3) . The organic layer was combined, washed with H2O (100 mL x 3) , and concentrated in vacuo to afford ethyl 2- (2-nitrophenyl) acetate (3.8 g, 91%) as a white solid.
[0281] MS (ESI) : mass calcd. for C10H11NO4, 209.07, m / z found 232.1 [M+Na] .
[0282] Step 2
[0283] To a solution of ethyl 2- (2-nitrophenyl) acetate (3.8 g, 0.018 mol) in EtOH (50 ml) was added Pd / C (100 mg) and the reaction mixture was stirred at 25 ℃ for 4 h under H2 balloon. The mixture was filtered through celite, and the filtrate was concentrated to afford ethyl 2- (2-aminophenyl) acetate (3.1 g, 95%) as a white solid.
[0284] MS (ESI) : mass calcd. for C10H13NO2, 179.09, m / z found 180.2 [M+H] +.
[0285] Step 3
[0286] To a mixture of ethyl 2- (2-aminophenyl) acetate (2.5 g, 0.014 mol) and DIEA (2.69 g, 0.021 mol) in THF (40 mL) was added 5-chloropentanoyl chloride (2.69 g, 0.021 mol) . After stirring at 20℃ for 2 h, the mixture was quenched with water (200 mL) and extracted with EA (200 mL x 3) . The organic layer was concentrated to afford the crude product which was purified by silica gel column chromatography (PE: EA = 3: 1) to give ethyl 2- [2- (5-chloropentanamido) phenyl] acetate (2.5 g, 58%) as a white solid.
[0287] MS (ESI) : mass calcd. for C15H20ClNO3, 297.11, m / z found 298.1 [M+H] +.
[0288] Step 4
[0289] To a mixture of ethyl 2- [2- (5-chloropentanamido) phenyl] acetate (2.5 g, 0.0084 mol) in THF (40 mL) was added t-BuOK (2.36 g, 0.021 mol) . After stirring at 20 ℃ for 2 h, the mixture was quenched with water (200 mL) and extracted with EA (200 mL x 3) . The organic layer was concentrated to afford a residue which was purified by silica gel column chromatography (PE: EA = 3: 1) to give ethyl 1H, 2H, 3H, 4H-pyrido [1, 2-a] indole-10-carboxylate (500 mg, 24%) as a white solid.
[0290] MS (ESI) : mass calcd. for C15H17NO2, 243.13, m / z found 244.1 [M+H] +.
[0291] Step 5
[0292] To a mixture of ethyl 1H, 2H, 3H, 4H-pyrido [1, 2-a] indole-10-carboxylate (500 mg, 2.06 mmol) in EtOH (15 mL) and H2O (5 mL) was added KOH (345.9 mg, 6.17 mmol) . The reaction mixture was stirred at 80 ℃ for 16 h. The reaction mixture was concentrated to remove EtOH. The mixture was adjusted to pH = 2 with 1M HCl. The mixture was diluted with water and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give 1H, 2H, 3H, 4H-pyrido [1, 2-a] indole-10-carboxylic acid (400 mg, 89%) as a white solid which was directly used for the next step.
[0293] MS (ESI) : mass calcd. for C13H13NO2, 215.09, m / z found 216.1 [M+H] +.
[0294] Step 6
[0295] To a mixture of 1H, 2H, 3H, 4H-pyrido [1, 2-a] indole-10-carboxylic acid (50 mg, 0.23 mmol) , (3R) -1-azabicyclo [2.2.2] octan-3-amine (29.3 mg, 0.23 mmol) and DIEA (90.1 mg, 0.70 mmol) in DMF (5 mL) was added HATU (106.0 mg, 0.28 mmol) . The reaction mixture was stirred at 20 ℃ for 6 h. The 1mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give the crude product which was purified by prep-HPLC (Xbridge prep c18 5um OBD 19*150mm, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate : 20 ml / min, wavelength: 214 / 254 nm) to give N- [ (3R) -1-azabicyclo [2.2.2] octan-3-yl] -1H, 2H, 3H, 4H-pyrido [1, 2-a] indole-10-carboxamide formate (28.7 mg, 38%) as a white solid.
[0296] MS (ESI) : mass calcd. for C20H25N3O, 323.20, m / z found 324.1 [M+H] +.
[0297] 1H NMR (400 MHz, DMSO-d6) δ 8.26 (s, 0.7 H) , 7.78-7.74 (m, 1H) , 7.48 (d, J = 4.0 Hz, 1H) , 7.43-7.40 (m, 1H) , 7.17-7.12 (m, 2H) , 4.14-4.05 (m, 3H) , 3.42-3.36 (m, 1H) , 3.17 (t, J = 8.0 Hz, 2H) , 3.12-3.05 (m, 1H) , 2.96-2.88 (m, 4H) , 2.09-2.00 (m, 4H) , 1.88-1.73 (m, 4H) , 1.59-1.53 (m, 1H) .
[0298] Step 7
[0299] To a mixture of 1H, 2H, 3H, 4H-pyrido [1, 2-a] indole-10-carboxylic acid (50 mg, 0.23 mmol) , (3S) -1-azabicyclo [2.2.2] octan-3-amine (29.3 mg, 0.23 mmol) and DIEA (90.1 mg, 0.70 mmol) in DMF (5 mL) was added HATU (106.0 mg, 0.28 mmol) . The reaction mixture was stirred at 20 ℃ for 6 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give the crude product which was purified by prep-HPLC (Xbridge prep c18 5um OBD 19*150mm, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate: 20 ml / min, wavelength: 214 / 254 nm) to give N- [ (3S) -1-azabicyclo [2.2.2] octan-3-yl] -1H, 2H, 3H, 4H-pyrido [1, 2-a] indole-10-carboxamide formate (35 mg, 46%) as a white solid.
[0300] MS (ESI) : mass calcd. for C20H25N3O, 323.20, m / z found 324.1 [M+H] +.
[0301] 1H NMR (400 MHz, DMSO-d6) δ 8.30 (s, 0.8 H) , 7.78-7.74 (m, 1H) , 7.48 (d, J = 8.0 Hz, 1H) , 7.44-7.40 (m, 1H) , 7.17-7.12 (m, 2H) , 4.14-4.07 (m, 3H) , 3.40-3.35 (m, 1H) , 3.17 (t, J = 8.0 Hz, 2H) , 3.12-3.05 (m, 1H) , 2.95-2.88 (m, 4H) , 2.08-1.99 (m, 4H) , 1.88-1.73 (m, 4H) , 1.59-1.53 (m, 1H) .
[0302] ‘
[0303] Example 6. Synthesis of I-15:
[0304] Experimental procedure:
[0305] Step 1
[0306] To a mixture of N- [ (3S) -1-azabicyclo [2.2.2] octan-3-yl] -1H, 2H, 3H, 4H-pyrazino [1, 2-a] indole-10-carboxamide (80 mg, 0.25 mmol) and paraformaldehyde (153.1 mg, 2.47 mmol) in methanol (5 mL) was added AcOH (14.8 mg, 0.25 mmol) . After stirring at 20 ℃ for 4 h, NaBH3CN (46.5 mg, 0.7398 mmol) was added and the reaction mixture was stirred at 20 ℃ for 12 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give the crude product which was purified by prep-HPLC (Xbridge prep c18 5um OBD 19*150mm, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate: 20 ml / min, wavelength: 214 / 254 nm) to give N- [ (3S) -1-azabicyclo [2.2.2] octan-3-yl] -2-methyl-1H, 3H, 4H-pyrazino [1, 2-a] indole-10-carboxamide (33.5 mg, 40%) as a white solid.
[0307] MS (ESI) : mass calcd. for C20H26N4O, 338.21, m / z found 339.3 [M+H] +.
[0308] 1H NMR (400 MHz, DMSO-d6) δ 7.77-7.73 (m, 1H) , 7.46-7.39 (m, 2H) , 7.20-7.16 (m, 2H) , 4.11 (t, J = 5.6 Hz, 2H) , 3.96-3.92 (m, 3H) , 3.14-3.08 (m, 1H) , 2.89-2.84 (m, 3H) , 2.72-2.64 (m, 4H) , 2.43 (s, 3H) , 1.91-1.81 (m, 2H) , 1.62-1.55 (m, 2H) , 1.38-1.32 (m, 1H) .
[0309] Example 7. Synthesis of I-16:
[0310] Experimental procedure:
[0311] Step 1
[0312] To a mixture of 5- (benzyloxy) -1H-indole (500 mg, 2.24 mmol) , bis(acetonitrile) dichloropalladium (II) (58.1 mg, 0.22 mmol) , norbornene (1054.2 mg, 11.20 mmol) and Cs2CO3 (1459.3 mg, 4.48 mmol) in DMA (10 mL) and H2O (0.1 mL) was added 1, 3-dibromopropane (1130.3 mg, 5.60 mmol) . After stirring at 80 ℃ for 12 h, the mixture was filtered through celite, the filtrate was diluted with water (200 mL) and extracted with EA (100 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure to give the crude product which was purified by flash chromatography (PE / EA, 100 / 1 to10 / 1) to give 7- (benzyloxy) -1H, 2H, 3H-benzo [b] pyrrolizine (200 mg, 31%) as a yellow solid.
[0313] MS (ESI) : mass calcd. for C18H17NO, 263.13, m / z found 264.1 [M+H] +.
[0314] Step 2
[0315] To a solution of 7- (benzyloxy) -1H, 2H, 3H-benzo [b] pyrrolizine (200 mg, 0.76 mmol) and TEA (92.2 mg, 0.91 mmol) in DCE (10 mL) was added TFAA (175.5 mg, 0.84 mol) at 0 ℃. The reaction mixture was stirred at 0 ℃ for 1 h. The mixture was diluted with water (200 mL) and extracted with DCM (100 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure to give the crude product which was purified by flash chromatography (PE / EA, 100 / 1 to 2 / 1) to give difluoromethyl 7- (benzyloxy) -1H, 2H, 3H-benzo [b] pyrrolizine-9-carbonyl fluoride (200 mg, 69%) as a yellow solid.
[0316] MS (ESI) : mass calcd. for C20H16F3NO2, 359.11, m / z found 360.1 [M+H] +.
[0317] Step 3
[0318] A mixture of difluoromethyl 7- (benzyloxy) -1H, 2H, 3H-benzo [b] pyrrolizine-9-carbonyl fluoride (200 mg, 0.56 mmol) and NaOH (44.4 mg, 1.1 mmol) in DMSO (5 mL) and H2O (5 mL) was stirred at 100℃ for 1 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL) . The aqueous phase was adjusted to pH = 2 with 1N HCl and extracted with EA (50 mL x 2) . The combined organic layer was dried over Na2SO4, concentrated to give 7- (benzyloxy) -1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (100 mg, 54%) as a yellow solid.
[0319] MS (ESI) : mass calcd. for C19H17NO3, 307.12, m / z found 308.0 [M+H] +.
[0320] Step 4
[0321] To a mixture of 7- (benzyloxy) -1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (100 mg, 0.33 mmol) , (3S) -1-azabicyclo [2.2.2] octan-3-amine (41.1 mg, 0.33 mmol) and DIEA (126.2 mg, 0.98 mmol) in DMF (5 mL) was added HATU (148.5 mg, 0.39 mmol) . The reaction mixture was stirred at room temperature for 6 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure to give N- [ (3S) -1-azabicyclo [2.2.2] octan-3-yl] -7- (benzyloxy) -1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxamide (100 mg, 70%) as a yellow solid.
[0322] MS (ESI) : mass calcd. for C26H29N3O2, 415.23, m / z found 416.2 [M+H] +.
[0323] Step 5
[0324] To a mixture of N- [ (3S) -1-azabicyclo [2.2.2] octan-3-yl] -7- (benzyloxy) -1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxamide (100 mg, 0.24 mmol) in EtOH (10 mL) were added Pd / C (25.6 mg, 0.24 mmol) and ammonium formate (30.4 mg, 0.48 mmol) under N2. The reaction mixture was stirred at 20 ℃ under N2 for 2 h. The mixture was filtered through celite, and the filtrate was concentrated under reduced pressure to give the crude product which was purified by prep-HPLC (Xbridge prep c18 10um OBD 19*150mm / WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate: 30 ml / min, wavelength: 214 / 254 nm) to give N- [ (3S) -1-azabicyclo [2.2.2] octan-3-yl] -7-hydroxy-1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxamide formate (32.4 mg, 41%) as a grey solid.
[0325] MS (ESI) : mass calcd. for C19H23N3O2, 325.18, m / z found 326.1 [M+H] +.
[0326] 1H NMR (400 MHz, DMSO-d6) δ 8.31 (s, 1H) , 7.27 (d, J = 2.0 Hz, 1H) , 7.14 (d, J = 8.0 Hz, 1H) , 6.99 (d, J = 6.4 Hz, 1H) , 6.60 (dd, J = 8.4, 2.0 Hz, 1H) , 4.05 4.02 (m, 3H) , 3.34-3.26 (m, 1H) , 3.22-3.16 (m, 2H) , 3.05-3.01 (m, 1H) , 2.88-2.80 (m, 4H) , 2.59-2.53 (m, 2H) , 2.02-1.94 (m, 2H) , 1.71-1.69 (m, 2H) , 1.54-1.51 (m, 1H) .
[0327] Example 8. Synthesis of I-17 &I-18:
[0328] Experimental procedure:
[0329] Step 1
[0330] To a mixture of 1H-indole (10 g, 0.085 mol) , bis (acetonitrile) dichloropalladium (II) (2.22 g, 0.0085 mol) , norbornene (40.2 g, 0.43 mol) and Cs2CO3 (55.65 g, 0.17 mol) in DMA (200 mL) and H2O (2 mL) was added 1, 3-dibromopropane (43.1 g, 0.21 mol) . The reaction mixture was stirred at 80 ℃ for 12 h. The mixture was filtered through celite, the filtrate diluted with water (200 mL) and extracted with EA (100 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give the crude product which was purified by flash chromatography (PE / EA, 100 / 1 to 10 / 1) to give 1H, 2H, 3H-benzo [b] pyrrolizine (500 mg, 3.4%) as a yellow solid.
[0331] MS (ESI) : mass calcd. for C11H11N, 157.09, m / z found 158.1 [M+H] +.
[0332] Step 2
[0333] To a solution of 1H, 2H, 3H-benzo [b] pyrrolizine (500 mg, 3.18 mmol) and TEA (386.2 mg, 3.82 mmol) in DCE (10 mL) was added ethyl 2-chloro-2-oxoacetate (477.7 mg, 3.50 mol) at 0 ℃. The reaction mixture was stirred at 0 ℃ for 2 h. The mixture was diluted with water (100 mL) and extracted with DCM (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give ethyl 2- {1H, 2H, 3H-benzo [b] pyrrolizin-9-yl} -2-oxoacetate (180 mg, 18%) as a yellow solid.
[0334] MS (ESI) : mass calcd. for C15H15NO3, 257.11, m / z found 258.1 [M+H] +.
[0335] Step 3
[0336] To a mixture of ethyl 2- {1H, 2H, 3H-benzo [b] pyrrolizin-9-yl} -2-oxoacetate (300 mg, 1.30 mmol) in MeOH (9 mL) and H2O (3 mL) was added NaOH (88.8 mg, 2.22 mmol) . The reaction mixture was stirred at 20 ℃ for 1 h. The reaction mixture was concentrated to remove MeOH and then adjusted to pH= 2 with 1M HCl. The mixture was diluted with water and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give 1H, 2H, 3H-benzo [b] pyrrolizin-9-yl (oxo) acetic acid (90 mg, 50%) as a yellow solid.
[0337] MS (ESI) : mass calcd. for C13H11NO3, 229.07, m / z found 230.1 [M+H] +.
[0338] Step 4
[0339] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizin-9-yl (oxo) acetic acid (45 mg, 0.20 mmol) , (3R) -1-azabicyclo [2.2.2] octan-3-amine (24.8 mg, 0.20 mmol) and DIEA (76.1 mg, 0.59 mmol) in DMF (5 mL) was added HATU (89.6 mg, 0.24 mmol) . The reaction mixture was stirred at 20 ℃ for 6 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure to give the crude product which was purified by prep-HPLC (Xbridge prep c18 10um OBD 19*150mm / WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate: 30 ml / min, wavelength: 214 / 254 nm) to give N- [ (3R) -1-azabicyclo [2.2.2] octan-3-yl] -2- {1H, 2H, 3H-benzo [b] pyrrolizin-9-yl} -2-oxoacetamide (25.4 mg, 37%) as a white solid.
[0340] MS (ESI) : mass calcd. for C20H23N3O2, 337.18, m / z found 338.1 [M+H] +.
[0341] 1H NMR (400 MHz, DMSO-d6) δ 8.81 (d, J = 8.0 Hz, 1H) , 8.15-8.13 (m, 1H) , 7.47 -7.45 (m, 1H) , 7.26-7.21 (m, 2H) , 4.19 (t, J = 8.0 Hz, 2H) , 3.96-3.94 (m, 1H) , 3.22-3.09 (m, 3H) , 2.87-2.84 (m, 1H) , 2.78-2.66 (m, 4H) , 2.65-2.57 (m, 2H) , 1.91-1.89 (m, 1H) , 1.78-1.75 (m, 1H) , 1.66-1.62 (m, 2H) , 1.40-1.34 (m, 1H) .
[0342] Step 5
[0343] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizin-9-yl (oxo) acetic acid (45 mg, 0.20 mmol) , (3S) -1-azabicyclo [2.2.2] octan-3-amine (24.8 mg, 0.20 mmol) and DIEA (76.1 mg, 0.59 mmol) in DMF (5 mL) was added HATU (89.6 mg, 0.24 mmol) . After stirring at 20 ℃for 6 h, the mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give the crude product which was purified by prep-HPLC (Xbridge prep c18 10um OBD 19*150mm / WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate: 30 ml / min, wavelength: 214 / 254 nm) to give N- [ (3S) -1-azabicyclo [2.2.2] octan-3-yl] -2- {1H, 2H, 3H-benzo [b] pyrrolizin-9-yl} -2-oxoacetamide formate (25.0 mg, 32%) as a white solid.
[0344] MS (ESI) : mass calcd. for C20H23N3O2, 337.18, m / z found 338.1 [M+H] +.
[0345] 1H NMR (400 MHz, DMSO-d6) δ 8.81 (d, J = 8.0 Hz, 1H) , 8.28 (s, 1H) , 8.15-8.13 (m, 1H) , 7.47-7.44 (m, 1H) , 7.26-7.21 (m, 2H) , 4.19 (t, J = 8.0 Hz, 2H) , 3.96-3.94 (m, 1H) , 3.22-3.09 (m, 3H) , 2.90-2.84 (m, 1H) , 2.79-2.66 (m, 4H) , 2.62-2.55 (m, 2H) , 1.92-1.89 (m, 1H) , 1.78-1.75 (m, 1H) , 1.66-1.62 (m, 2H) , 1.41-1.35 (m, 1H) .
[0346] Example 9. Synthesis of I-19:
[0347] Experimental procedure:
[0348] Step 1
[0349] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (50 mg, 0.25 mmol) , endo-9-methyl-9-azabicyclo [3.3.1] nonan-3-amine (38.3 mg, 0.25 mmol) and DIEA (96.4 mg, 0.75 mmol) in DMF (5 mL) was added HATU (113.4 mg, 0.30 mmol) . The reaction mixture was stirred at 20 ℃ for 6 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give the crude product, which was purified by prep-HPLC (Xbridge prep c18 5um OBD 19*150mm, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate : 20 ml / min, wavelength: 214 / 254 nm) to give N- ( (1R, 3r, 5S) -9-methyl-9-azabicyclo [3.3.1] nonan-3-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide formate (46.8 mg, 56%) as a white solid.
[0350] MS (ESI) : mass calcd. for C21H27N3O, 337.22, m / z found 338.2 [M+H] +.
[0351] 1H NMR (400 MHz, DMSO-d6) δ 8.21 (s, 0.8 H) , 7.93-7.91 (m, 1H) , 7.36-7.34 (m, 1H) , 7.14-7.07 (m, 2H) , 6.87 (d, J = 8.4 Hz, 1H) , 4.43-4.35 (m, 1H) , 4.11 (t, J = 7.2 Hz, 2H) , 3.25-3.17 (m, 4H) , 2.61-2.56 (m, 2H) , 2.54 (s, 3H) , 2.31-2.24 (m, 2H) , 2.15-2.07 (m, 1H) , 1.99-1.91 (m, 2H) , 1.61-1.54 (m, 2H) , 1.47-1.44 (m, 1H) , 1.11-1.07 (m, 2H) .
[0352] Example 10. Synthesis of I-20:
[0353] Experimental procedure:
[0354] Step 1
[0355] To a mixture of 7-fluoro-1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (50 mg, 0.23 mmol) in dimethylformamide (5 mL) were added HATU (130 mg, 0.34 mmol) and DIEA (88 mg, 0.68 mmol) at 0 ℃ under N2 protection. After stirring for 30 minutes, 9-methyl-9-azabicyclo [3.3.1] nonan-3-amine (35 mg, 0.23 mmol) was added and the mixture was then stirred at 50 ℃ for 2 hours. The mixture was extracted with EA (10 mL×3) . The combined organic layer was washed with brine (10 mL × 2) , dried over Na2SO4 and concentrated under reduced pressure to afford crude product which was purified by Prep-HPLC (Xbridge prep c18 10um OBD 19*150mm / WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) , B (Acetonitrile) , 20~100%of B in A, 10.5 min, Flow rate: 30ml / min, wavelength: 214 / 254 nm) to give 7-fluoro-N- {9-methyl-9-azabicyclo [3.3.1] nonan-3-yl} -1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxamide formate (26.9 mg, 33.2%) as white solid.
[0356] MS (ESI) : mass calcd. for C21H26FN3O, 355.21, m / z found 356.2 [M+H] +.
[0357] 1H NMR (400 MHz, DMSO) δ 8.25 (s, 1H) , 7.64 (dd, J = 12.0, 4.0 Hz, 1H) , 7.38 (dd, J = 8.0, 4.0 Hz, 1H) , 7.00-6.91 (m, 2H) , 4.72-4.64 (m, 1H) , 4.11 (t, J = 8.0 Hz, 2H) , 3.25-3.22 (m, 2H) , 3.02-3.01 (m, 2H) , 2.61-2.54 (m, 4H) , 2.08-1.59 (m, 11H) .
[0358] Example 11. Synthesis of I-21:
[0359] Experimental procedure:
[0360] Step 1
[0361] To a mixture of 7-fluoro-1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (50 mg, 0.23 mmol) , 9-methyl-9-azabicyclo [3.3.1] nonan-3-amine (35.2 mg, 0.23 mmol) and DIEA (88.4 mg, 0.68 mmol) in DMF (5 mL) was added HATU (104.1 mg, 0.27 mmol) . After stirring at room temperature for 6 h, the mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give the crude product, which was purified by prep-HPLC (Xbridge prep c18 5um OBD 19*150mm, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate : 20 ml / min, wavelength: 214 / 254 nm) to give 7-fluoro-N- ( (1R, 3R, 5S) -9-methyl-9-azabicyclo [3.3.1] nonan-3-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide formate (32.0 mg, 39%) as a white solid.
[0362] MS (ESI) : mass calcd. for C21H26FN3O, 355.21, m / z found 356.2 [M+H] +.
[0363] 1H NMR (400 MHz, DMSO-d6) δ 8.22 (s, 1H) , 7.64 (dd, J = 10.4, 2.4 Hz, 1H) , 7.37 (dd, J = 8.8, 4.8 Hz, 1H) , 6.99-6.94 (m, 1H) , 6.83 (d, J = 8.8 Hz, 1H) , 4.37-4.32 (m, 1H) , 4.11 (t, J = 7.2 Hz, 2H) , 3.24 (t, J = 7.6 Hz, 2H) , 3.10 (d, J = 10.8 Hz, 2H) , 2.67-2.54 (m, 3H) , 2.50-2.48 (m, 2H) , 2.28-2.20 (m, 2H) , 2.14-2.08 (m, 1H) , 1.97-1.90 (m, 2H) , 1.57-1.43 (m, 3H) , 1.02 (d, J = 13.2 Hz, 2H) .
[0364] Example 12. Synthesis of I-22:
[0365] Experimental procedure:
[0366] Step 1
[0367] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (440 mg, 2.18 mmol) in DCM (5 mL) was added SOCl2 (520 mg, 4.37 mmol) and a drop of DMF at 0 ℃. The reaction mixture was stirred at room temperature for 2 h under N2. The mixture was concentrated under reduced pressure to give the crude product which was redissolved in DCM (5 mL) . Pyridine (864 mg, 10.93 mmol) and endo-tert-butyl (1R, 3r, 5S) -3-hydroxy-9-azabicyclo [3.3.1] nonane-9-carboxylate (220 mg, 0.91 mmol) were added subsequently at room temperature. The reaction mixture was stirred at 50 ℃ for 16 h. The mixture was concentrated under reduced pressure to give the crude product which was purified by silica gel column chromatography (mobile phase A: PE, B: EA; 0 ~ 35%of B in A) to give (1R, 3r, 5S) -9- (tert-butoxycarbonyl) -9-azabicyclo [3.3.1] nonan-3-yl 2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxylate (250 mg, 26%) as an off-white solid.
[0368] MS (ESI) : mass calcd. for C25H32N2O4, 424.24, m / z found 447.2 [M+Na] +.
[0369] Step 2
[0370] To a mixture of endo- (1R, 3r, 5S) -9- (tert-butoxycarbonyl) -9-azabicyclo [3.3.1] nonan-3-yl 2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxylate (250 mg, 0.58 mmol) in DCM (6 mL) was added TFA (2 mL) at 0 ℃. The reaction mixture was stirred at room temperature for 1 h. The mixture was basified to pH 7 with NaHCO3 aq. solution and extracted with EA (20 mL x 3) . The organic layer was washed with brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure to give endo- (1R, 3r, 5S) -9-azabicyclo [3.3.1] nonan-3-yl 2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxylate (160 mg, 83%) as an off-white solid.
[0371] MS (ESI) : mass calcd. for C20H24N2O2, 324.18, m / z found 325.2 [M+H] +.
[0372] Step 3
[0373] To a mixture of endo- (1R, 3r, 5S) -9-azabicyclo [3.3.1] nonan-3-yl 2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxylate (160 mg, 0.49 mmol) and formaldehyde aqueous solution (37%, 80 mg, 0.98 mmol) in DCM (5 mL) was added NaBH (OAc) 3 (313 mg, 1.47 mmol) at room temperature. The reaction mixture was stirred for 16 h. After reaction, the mixture was quenched with Na2S2O3 aq. solution (20 mL) and extracted with EA (20 mL x 3) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give the crude product which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm 10um; mobile phase A: water (0.1%FA) , B: Acetonitrile, 22 ~ 52%B in 10 min; flow rate: 30 mL / min; wavelength: 214 / 254 nm) to give endo- (1R, 3r, 5S) -9-methyl-9-azabicyclo [3.3.1] nonan-3-yl 2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxylate formate (93.8 mg, 56%) as a white solid.
[0374] MS (ESI) : mass calcd. for C21H26N2O2, 338.20, m / z found 339.2 [M+H] +.
[0375] 1H NMR (400 MHz, CDCl3) δ 8.63 (s, 0.67 H) , 8.07-8.00 (m, 1H) , 7.31-7.27 (m, 1H) , 7.25-7.19 (m, 2H) , 5.33-5.25 (m, 1H) , 4.15 (t, J = 8.0 Hz, 2H) , 3.42 (t, J = 4.0 Hz, 2H) , 3.31 (t, J = 8.0 Hz, 2H) , 2.91-2.75 (m, 5H) , 2.74-2.60 (m, 3H) , 2.33-2.19 (m, 2H) , 2.05 (d, J = 16.0 Hz, 2H) , 1.66 (dd, J = 16.0, 4.0 Hz, 2H) , 1.58-1.49 (m, 1H) .
[0376] Example 13. Synthesis of I-23:
[0377] Experimental procedure:
[0378] Step 1
[0379] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (30 mg, 0.15 mmol) , 1-azabicyclo [2.2.1] heptan-3-amine (16.7 mg, 0.15 mmol) and DIEA (57.8 mg, 0.45 mmol) in DMF (5 mL) was added HATU (68.0 mg, 0.18 mmol) and the reaction mixture was stirred at room temperature for 6 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The combined organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give the crude product, which was purified by prep-HPLC (Xbridge prep c18 10um OBD 19*150mm / WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate: 30 ml / min, wavelength: 214 / 254 nm) to give N- (1-azabicyclo [2.2.1] heptan-3-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide (15.7 mg, 36%) as a yellow solid.
[0380] MS (ESI) : mass calcd. for C18H21N3O, 295.17, m / z found 296.1 [M+H] +.
[0381] 1H NMR (400 MHz, MeOD) δ 8.49 (s, 1H) , 7.89-7.87 (m, 1H) , 7.35-7.32 (m, 1H) , 7.20-7.14 (m, 2H) , 4.59-4.12 (m, 3H) , 3.84-3.62 (m, 1H) , 3.48-3.30 (m, 2H) , 3.28-3.22 (m, 4H) , 3.15-3.04 (m, 2H) , 2.73-2.64 (m, 2H) , 2.25-1.76 (m, 2H) .
[0382] Example 14. Synthesis of I-24:
[0383] Experimental procedure:
[0384] Step 1
[0385] To a mixture of 7-fluoro-1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (30 mg, 0.14 mmol) , 1-azabicyclo [2.2.1] heptan-3-amine (15.4 mg, 0.14 mmol) and DIEA (53.1 mg, 0.41 mmol) in DMF (5 mL) was added HATU (62.5 mg, 0.16 mmol) . The reaction mixture was stirred at room temperature for 6 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give the crude product, which was purified by prep-HPLC (Xbridge prep c18 10um OBD 19*150mm / WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate: 30 ml / min, wavelength: 214 / 254 nm) to give N- (1-azabicyclo [2.2.1] heptan-3-yl) -7-fluoro-2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide (14.4 mg, 34%) as a yellow solid.
[0386] MS (ESI) : mass calcd. for C18H20FN3O, 313.16, m / z found 314.1 [M+H] +.
[0387] 1H NMR (400 MHz, MeOD) δ 8.49 (s, 1H) , 7.59-7.57 (m, 1H) , 7.33-7.29 (m, 1H) , 6.97-6.91 (m, 1H) , 4.58-4.13 (m, 3H) , 3.83-3.60 (m, 1H) , 3.43-3.33 (m, 3H) , 3.30-3.24 (m, 3H) , 3.14-3.03 (m, 2H) , 2.73-2.65 (m, 2H) , 2.19-1.78 (m, 2H) .
[0388] Example 15. Synthesis of I-25:
[0389] Experimental procedure:
[0390] Step 1
[0391] To a mixture of 7-fluoro-2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxylic acid (86 mg, 0.39 mmol) and DIEA (230 mg, 1.78 mmol) in DMF (2 mL) was added HATU (142 mg, 0.37 mmol) in portions andthe mixture was stirred at 25 ℃ for 30 min. Hexahydropyrrolizin-7a-ylmethanamine (50 mg, 0.35 mmol) was added at 0 ℃ and the mixture was stirred at 25 ℃ for 1 h. The mixture was diluted with water (50 mL) and extracted with EA (50 mL x 3) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure. The residue was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm 10um; mobile phase A: water (0.1%FA) , B: Acetonitrile, 15 ~ 45%B in 10 min; flow rate: 30 mL / min; wavelength: 214 / 254 nm) to give 7-fluoro-N- ( (tetrahydro-1H-pyrrolizin-7a (5H) -yl) methyl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide formate (97.3 mg, 79%) as a white solid.
[0392] MS (ESI) : mass calcd. for C20H24FN3O, 341.19, m / z found 342.2 [M+H] +.
[0393] 1H NMR (400 MHz, DMSO) δ 8.31 (s, 1H) , 7.72 (dd, J = 10.8, 2.8 Hz, 1H) , 7.39 (dd, J = 8.8, 4.8 Hz, 1H) , 7.32-7.23 (m, 1H) , 7.02-6.95 (m, 1H) , 4.13 (t, J = 7.2 Hz, 2H) , 3.41 (d, J = 6.0 Hz, 2H) , 3.26 (t, J = 7.6 Hz, 2H) , 3.22-3.15 (m, 2H) , 2.85-2.75 (m, 2H) , 2.65-2.55 (m, 2H) , 1.99-1.82 (m, 4H) , 1.82-1.61 (m, 4H) .
[0394] Example 16. Synthesis of I-26:
[0395] Experimental procedure:
[0396] Step 1
[0397] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (100 mg, 0.50 mmol) , hexahydropyrrolizin-7a-ylmethanol (70.2 mg, 0.50 mmol) , 2-chloro-1-methylpyridinium iodide (CMPI) (165.1 mg, 0.65 mmol) and Et3N (75.4 mg, 0.75 mmol) in DMF (10 mL) was added 4-DMAP (60.7 mg, 0.50 mmol) and the reaction mixture was stirred at room temperature for 16 h. After reaction, the mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give a residue which was purified by prep-HPLC (Xbridge prep c18 10um OBD 19*150mm / WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate: 30 ml / min, wavelength: 214 / 254 nm) to give (tetrahydro-1H-pyrrolizin-7a (5H) -yl) methyl 2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxylate formate (7 mg, 4%) as a white solid.
[0398] MS (ESI) : mass calcd. for C20H24N2O2, 324.18, m / z found 325.2 [M+H] +.
[0399] 1H NMR (400 MHz, DMSO-d6) δ 8.39 (s, 0.3H) , 7.96-7.93 (m, 1H) , 7.42-7.40 (m, 1H) , 7.19-7.15 (m, 2H) , 4.16 (t, J = 8.0 Hz, 2H) , 3.91 (s, 2H) , 3.21 (t, J = 8.0 Hz, 2H) , 2.96 -2.91 (m, 2H) , 2.64-2.52 (m, 4H) , 1.92-1.86 (m, 2H) , 1.85-1.69 (m, 4H) , 1.62-1.56 (m, 2H) .
[0400] Example 17. Synthesis of I-27:
[0401] Experimental procedure:
[0402] Step 1
[0403] To a mixture of 1-azabicyclo [2.2.2] octane-3-carbonitrile (190 mg, 1.40 mmol) in EtOH (20 mL) were added NH2OH. HCl (193.9 mg, 2.79 mmol) and K2CO3 (578.5 mg, 4.19 mmol) . The reaction mixture was stirred at 80 ℃ for 12 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give N-hydroxyquinuclidine-3-carboximidamide (100 mg, crude) as a yellow solid which was used directly for the next step.
[0404] MS (ESI) : mass calcd. for C8H15N3O, 169.12, m / z found 170.1 [M+H] +.
[0405] Step 2
[0406] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (118.9 mg, 0.59 mmol) in DMF (10 mL) were added HBTU (246.5 mg, 0.65 mmol) and DIEA (229.1 mg, 1.77 mmol) . The mixture was stirred at room temperature for 1 h. N-hydroxy-1-azabicyclo [2.2.2] octane-3-carboximidamide (100 mg, 0.59 mmol) was added and the reaction mixture was stirred at 120 ℃ for 8 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give the crude product, which was purified by prep-HPLC (Xbridge prep c18 5um OBD 19*150mm, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate : 20 ml / min, wavelength: 214 / 254 nm) to give 5- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -3- (quinuclidin-3-yl) -1, 2, 4-oxadiazole trifluoroacetate (13.3 mg, 7%) as a yellow solid.
[0407] MS (ESI) : mass calcd. for C20H22N4O, 334.18, m / z found 335.1 [M+H] +.
[0408] 1H NMR (400 MHz, DMSO-d6) δ 9.61 (s, 0.8H) , 8.06-8.04 (m, 1H) , 7.53-7.50 (m, 1H) , 7.29-7.24 (m, 2H) , 4.25 (t, J = 7.2 Hz, 2H) , 3.80-3.74 (m, 1H) , 3.68-3.62 (m, 2H) , 3.37-3.30 (m, 6H) , 2.72-2.65 (m, 2H) , 2.56-2.54 (m, 1H) , 2.09-1.97 (m, 2H) , 1.87-1.75 (m, 2H) .
[0409] Example 18. Synthesis of I-28:
[0410] Experimental procedure:
[0411] Step 1
[0412] To a solution of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (600 mg, 2.99 mmol) in DMF (12 mL) were added DIEA (3.85 g, 29.82 mmol) and HATU (1.70 g, 4.47 mmol) at room temperature. After stirring for 30 minutes, NH4Cl (0.96 g, 17.89 mmol) was added, and the reaction mixture was stirred at 50 ℃ for 1 h. The mixture was concentrated to give a residue which was purified by silica gel column chromatography (DCM / MeOH=20: 1) to give 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxamide (500 mg, 79%) as a white solid.
[0413] MS (ESI) : mass calcd. for C12H12N2O, 200.09, m / z found 201.1 [M+H] +.
[0414] Step 2
[0415] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxamide (500 mg, 2.50 mmol) and pyridine (1.97g, 25 mmol) in DCM (50 mL) was added TFAA (1.84 g, 8.75 mmol) dropwise at 0 ℃. After stirring at room temperature for 0.5 h, the reaction mixture was quenched with water and extracted with DCM (20 mL × 3) . The combined organic layer was washed with brine (10 mL × 2) , dried over Na2SO4 and concentrated under reduced pressure to afford the crude product which was purified by silica gel column chromatography (PE / EA =1: 1) to afford 1H, 2H, 3H-benzo [b] pyrrolizine-9-carbonitrile (350 mg, 73%) as a white solid.
[0416] MS (ESI) : mass calcd. for C12H10N2, 182.08, m / z found 183.1 [M+H] +.
[0417] Step 3
[0418] To a solution of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carbonitrile (350 mg, 1.92 mmol) in EtOH (35 mL) was added NH2OH / H2O (3.5 mL) dropwise at room temperature and the reaction mixture was stirred at 80 ℃ for 8 hours. The mixture was concentrated under reduced pressure to afford crude product (400 mg, crude) as a white solid.
[0419] MS (ESI) : mass calcd. for C12H13N3O, 215.11, m / z found 216.1 [M+H] +.
[0420] Step 4
[0421] To a solution of (3S) -1-azabicyclo [2.2.2] octane-3-carboxylic acid (180 mg, 1.16 mmol) in dimethylformamide (8 mL) were added 2- (1H-benzotriazole-1-yl) -1, 1, 3, 3-tetramethyluronium tetrafluoroborate (410 mg, 1.28 mmol) and DIEA (450 mg, 3.48 mmol) at room temperature. After stirring for 1 h, N-hydroxy-1H, 2H, 3H-benzo [b] pyrrolizine-9-carboximidamide (250 mg, 1.16 mmol) was added and the reaction mixture was stirred at 50 ℃ for 16 h. The reaction mixture was quenched with water and extracted with EA (20 mL× 3) . The combined organic layer was washed with brine (20 mL × 2) , dried over Na2SO4 and concentrated under reduced pressure to afford the crude product which was purified by prep-HPLC (Welch 10u C18 250 x 21.2 mm, Mobile Phase A: water (0.1%NH3) , B (Acetonitrile) , 70~100%of B in A, 9 min, Flow rate: 30ml / min, wavelength: 214 / 254 nm) to give (3R) -3- (3- {1H, 2H, 3H-benzo [b] pyrrolizin-9-yl} -1, 2, 4-oxadiazol-5-yl) -1-azabicyclo [2.2.2] octane (33 mg, 8%) as a pink solid.
[0422] MS (ESI) : mass calcd. for C20H22N4O, 334.18, m / z found 335.2 [M+H] +.
[0423] 1H NMR (400 MHz, DMSO-d6) δ 8.04-7.94 (m, 1H) , 7.50-7.39 (m, 1H) , 7.24-7.11 (m, 2H) , 4.18 (t, J = 8.0 Hz, 2H) , 3.30-3.26 (m, 5H) , 2.89-2.79 (m, 4H) , 2.67-2.59 (m, 2H) , 2.22-2.20 (m, 1H) , 1.79-1.52 (m, 3H) , 1.48 -1.39 (m, 1H) .
[0424] Example 19. Synthesis of I-29 &I-30:
[0425] Experimental procedure:
[0426] Step 1
[0427] [Corrected under Rule 26, 11.12.2024]The product of 3- (3- {1H, 2H, 3H-benzo [b] pyrrolizin-9-yl} -1, 2, 4-oxadiazol-5-yl) -1-azabicyclo [2.2.2] octane (30 mg) was purified by SFC (CHIRALCEL AD, 250mm x 30 mm I.D, 10μm, Mobile phase: CO2 / MeOH [0.2%NH3 (7M Solution in MeOH) ] = 50 / 50, Flow rate : 80 g / min, Wave length: UV 214nm, Temperature: 35℃) to give the crude product which was purified by Pre-HPLC (WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%TFA) , B (Acetonitrile) , 35~100%of B in A, 9.5 min, Flow rate: 25ml / min, wavelength: 214 / 254 nm) to give (3R) -3- (3- {1H, 2H, 3H-benzo [b] pyrrolizin-9-yl} -1, 2, 4-oxadiazol-5-yl) -1-azabicyclo [2.2.2] octane (6 mg, 20%) as white solid and purified by Pre-HPLC (WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%TFA) , B (Acetonitrile) , 35~100%of B in A, 9.5 min, Flow rate: 25ml / min, wavelength: 214 / 254 nm) to give (5S) -3, 3-difluoro-5- (3- {7-fluoro-1H, 2H, 3H-benzo [b] pyrrolizin-9-yl} -1, 2, 4-oxadiazol-5-yl) piperidine (7 mg, 23.3%) as white solid.
[0428] I-29
[0429] MS (ESI) : mass calcd. for C20H22N4O, 334.18, m / z found 335.2 [M+H] +.
[0430] 1H NMR (400 MHz, DMSO) δ 9.63 (s, 1H) , 8.00-7.97 (m, 1H) , 7.48 -7.44 (m, 1H) , 7.23-7.17 (m, 2H) , 4.20 (t, J = 8.0 Hz, 2H) , 4.01-3.63 (m, 3H) , 3.38-3.35 (m, 1H) , 3.32-3.26 (m, 4H) , 2.71-2.60 (m, 2H) , 2.55-2.50 (m, 2H) , 2.10-2.08 (m, 1H) , 2.02-1.94 (m, 1H) , 1.84-1.81 (m, 2H) .
[0431] I-30
[0432] MS (ESI) : mass calcd. for C20H22N4O, 334.18, m / z found 335.2 [M+H] +.
[0433] 1H NMR (400 MHz, DMSO) δ 9.63 (s, 1H) , 8.00-7.97 (m, 1H) , 7.48-7.44 (m, 1H) , 7.23-7.17 (m, 2H) , 4.20 (t, J = 8.0 Hz, 2H) , 4.01-3.63 (m, 3H) , 3.38-3.35 (m, 1H) , 3.32 3.26 (m, 4H) , 2.71-2.60 (m, 2H) , 2.55-2.50 (m, 2H) , 2.10-2.08 (m, 1H) , 2.02-1.94 (m, 1H) , 1.84-1.81 (m, 2H) .
[0434] Example 20. Synthesis of I-31:
[0435] Experimental procedure:
[0436] Step 1
[0437] To a mixture of 1H, 3H, 4H- [1, 4] oxazino [4, 3-a] indole (450 mg, 2.60 mmol) in DMF (10 mL) was added [ (chlorosulfonyl) imino] methanone (441.2 mg, 3.12 mmol) at -20℃ and the reaction mixture was then stirred at room temperature for 8 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give 1H, 3H, 4H- [1, 4] oxazino [4, 3-a] indole-10-carbonitrile (400 mg, 70%) as a yellow solid which was used for the next step directly.
[0438] MS (ESI) : mass calcd. for C12H10N2O, 198.08, m / z found 199.1 [M+H] +.
[0439] Step 2
[0440] To a solution of 1H, 3H, 4H- [1, 4] oxazino [4, 3-a] indole-10-carbonitrile (350 mg, 1.77 mmol) in EtOH (10 mL) was added NH2OH / H2O (116.6 mg, 3.53 mmol) and the reaction mixture was heated to 80℃ and stirred for 4 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The combined organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give N-hydroxy-1H, 3H, 4H- [1, 4] oxazino [4, 3-a] indole-10-carboximidamide (350 mg, 69%) as a yellow solid which was used for the next step directly.
[0441] MS (ESI) : mass calcd. for C12H13N3O2, 231.10, m / z found 232.1 [M+H] +.
[0442] Step 3
[0443] To a mixture of 1-azabicyclo [2.2.2] octane-3-carboxylic acid (67.1 mg, 0.43 mmol) in DMF (10 mL) were added HBTU (196.8 mg, 0.52 mmol) and DIEA (167.7 mg, 1.30 mmol) . The mixture was stirred at room temperature for 1 h. N-hydroxy-1H, 3H, 4H- [1, 4] oxazino [4, 3-a] indole-10-carboximidamide (100 mg, 0.43 mmol) was then added and the reaction mixture was heated to 90 ℃ and stirred for 5 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give the crude product, which was purified by prep-HPLC (Xbridge prep c18 5um OBD 19*150mm, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate : 20 ml / min, wavelength: 214 / 254 nm) to give 10- (5- (quinuclidin-3-yl) -1, 2, 4-oxadiazol-3-yl) -3, 4-dihydro-1H- [1, 4] oxazino [4, 3-a] indole formate (9.7 mg, 6%) as a white solid.
[0444] MS (ESI) : mass calcd. for C20H22N4O2, 350.17, m / z found 351.1 [M+H] +.
[0445] 1H NMR (400 MHz, DMSO-d6) δ 8.28 (s, 0.5H) , 8.09-8.07 (m, 1H) , 7.56-7.54 (m, 1H) , 7.30-7.24 (m, 2H) , 5.27 (s, 2H) , 4.21-4.09 (m, 4H) , 3.37-3.32 (m, 1H) , 3.28-3.26 (m, 2H) , 2.89-2.74 (m, 4H) , 2.20-2.19 (m, 1H) , 1.73-1.42 (m, 4H) .
[0446] Example 21. Synthesis of I-32:
[0447] Experimental procedure:
[0448] Step 1
[0449] To a solution of ethyl 5-fluoro-1H-indole-2-carboxylate (10.0 g, 48 mmol) in THF (200 mL) was added LiAlH4 (2.2 g, 57.9 mmol) at 0 ℃ and the reaction1 mixture was stirred at room temperature for 3 h. The reaction mixture was quenched with H2O (6 mL) and 15%NaOH (9 mL) . The mixture was filtered, the filtrate was diluted with water (500 mL) and extracted with EA (300 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give a residue which was purified by flash chromatography (PE / EA =100 / 1 to 1 / 1) to give (5-fluoro-1H-indol-2-yl) methanol (7 g, 87%) as a yellow solid.
[0450] MS (ESI) : mass calcd. for C9H8FNO, 165.06, m / z found 166.1 [M+H] +.
[0451] Step 2
[0452] To a solution of (5-fluoro-1H-indol-2-yl) methanol (2.0 g, 12.1 mmol) in DCM (40 mL) was added KOH (1.7 g, 30.2 mmol) at 0 ℃ and the mixture was stirred at this temperature for 0.5 h. Ethenyldiphenylsulfanium trifluoromethanesulfonate (5.26 g, 14.5 mmol) was added and the reaction mixture was warmed up and stirred at room temperature for 16 h. The reaction mixture was concentrated under reduced pressure to give the crude product which was purified by flash chromatography (PE / EA=100 / 1 to 10 / 1) to give 8-fluoro-1H, 3H, 4H- [1, 4] oxazino [4, 3-a] indole (1.2 g, 49%) as a yellow solid.
[0453] MS (ESI) : mass calcd. for C11H10FNO, 191.07, m / z found 192.1 [M+H] +.
[0454] Step 3
[0455] To a solution of 8-fluoro-1H, 3H, 4H- [1, 4] oxazino [4, 3-a] indole (550 mg, 2.88 mmol) in DMF (10 mL) was added [ (chlorosulfonyl) imino] methanone (407 mg, 2.88 mmol) at -20 ℃. The reaction mixture was warmed up to room temperature and stirred for 8 h. The reaction mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure to give a residue which was purified by silica gel column chromatography (PE / EA=100 / 1 to 5 / 1) to give 8-fluoro-1H, 3H, 4H- [1, 4] oxazino [4, 3-a] indole-10-carbonitrile (500 mg, 69%) as a yellow solid.
[0456] MS (ESI) : mass calcd. for C12H9FN2O, 216.07, m / z found 217.1 [M+H] +.
[0457] Step 4
[0458] To a solution of 8-fluoro-1H, 3H, 4H- [1, 4] oxazino [4, 3-a] indole-10-carbonitrile (450 mg, 2.08 mmol) in EtOH (10 mL) was added NH2OH / H2O (137 mg, 4.16 mmol) and the reaction mixture was stirred at 80 ℃ for 4 h. The reaction mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure to give 8-fluoro-N-hydroxy-1H, 3H, 4H- [1, 4] oxazino [4, 3-a] indole-10-carboximidamide (450 mg, crude) as a yellow solid.
[0459] MS (ESI) : mass calcd. for C12H12FN3O2, 249.09, m / z found 250.1 [M+H] +.
[0460] Step 5
[0461] To a solution of 1-azabicyclo [2.2.2] octane-3-carboxylic acid (62 mg, 0.40 mmol) in DMF (10 mL) were added HBTU (183 mg, 0.48 mmol) and DIEA (156 mg, 1.20 mmol) . The mixture was stirred at room temperature for 1 h. 8-fluoro-N-hydroxy-1H, 3H, 4H- [1, 4] oxazino [4, 3-a] indole-10-carboximidamide (100 mg, 0.40 mmol) was added and the reaction mixture was stirred at 90 ℃ for 5 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give the crude product which was purified by Prep-HPLC (Xbridge prep c18 5um OBD 19*150mm, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate : 20 ml / min, wavelength: 214 / 254 nm) to give 8-fluoro-10- (5- (quinuclidin-3-yl) -1, 2, 4-oxadiazol-3-yl) -3, 4-dihydro-1H- [1, 4] oxazino [4, 3-a] indole formate (10.2 mg, 7%) as a white solid.
[0462] MS (ESI) : mass calcd. for C20H21FN4O2, 368.16, m / z found 369.1 [M+H] +.
[0463] 1H NMR (400 MHz, DMSO-d6) δ 8.26 (s, 1H) , 7.76-7.73 (m, 1H) , 7.61-7.58 (m, 1H) , 7.17-7.12 (m, 1H) , 5.25 (s, 2H) , 4.22-4.18 (m, 4H) , 3.38-3.32 (m, 1H) , 3.28-3.26 (m, 2H) , 2.84-2.80 (m, 4H) , 2.21-2.19 (m, 1H) , 1.74-1.42 (m, 4H) .
[0464] Example 22. Synthesis of I-33:
[0465] Experimental procedure:
[0466] Step 1
[0467] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (50 mg, 0.25 mmol) , exo- (1R, 3S, 5S) -9-methyl-9-azabicyclo [3.3.1] nonan-3-amine (38.3 mg, 0.25 mmol) and DIEA (96.4 mg, 0.75 mmol) in DMF (5 mL) was added HATU (113.4 mg, 0.30 mmol) . After stirring at room temperature for 6 h, the reaction mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give the crude product which was purified by prep-HPLC (Xbridge prep c18 5um OBD 19*150mm, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate : 20 ml / min, wavelength: 214 / 254 nm) to give N- ( (1R, 3s, 5S) -9-methyl-9-azabicyclo [3.3.1] nonan-3-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide formate (28.6 mg, 34%) as a white solid.
[0468] MS (ESI) : mass calcd. for C21H27N3O, 337.22, m / z found 338.2 [M+H] +.
[0469] 1H NMR (400 MHz, DMSO-d6) δ 8.29 (s, 1H) , 7.92-7.90 (m, 1H) , 7.37-7.34 (m, 1H) , 7.14-7.07 (m, 2H) , 6.89 (d, J = 8.0 Hz, 1H) , 4.73-4.67 (m, 1H) , 4.11 (t, J = 7.2 Hz, 2H) , 3.22 (t, J = 7.2 Hz, 2H) , 3.01 (s, 2H) , 2.62-2.54 (m, 5H) , 2.08-1.97 (m, 4H) , 1.89-1.57 (m, 6H) .
[0470] Example 23. Synthesis of I-34:
[0471] Experimental procedure:
[0472] Step 1
[0473] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (200 mg, 0.99 mmol) in DCM (5 mL) at 0 ℃ was added SOCl2 (236 mg, 1.98 mmol) followed by a drop of DMF dropwise. The reaction mixture was stirred at room temperature for 2 h under N2. The mixture was concentrated under reduced pressure to give a crude product which was re-dissolved in DCM (5 mL) . Pyridine (393 mg, 4.96 mmol) and tert-butyl (1R, 3s, 5S) -3-hydroxy-9-azabicyclo [3.3.1] nonane-9-carboxylate (96 mg, 0.39 mmol) were added at room temperature and the mixture was stirred at 50 ℃ for 16 h. The mixture was concentrated under reduced pressure to give the crude product which was purified by flash chromatography (mobile phase A: PE, B: EA; 0 ~ 25%of B in A) to give (1R, 3s, 5S) -9- (tert-butoxycarbonyl) -9-azabicyclo [3.3.1] nonan-3-yl 2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxylate (214 mg, 48%) as a yellow solid.
[0474] MS (ESI) : mass calcd. for C25H32N2O4, 424.24, m / z found 447.2 [M+Na] +.
[0475] Step 2
[0476] To a mixture of (1R, 3s, 5S) -9- (tert-butoxycarbonyl) -9-azabicyclo [3.3.1] nonan-3-yl 2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxylate (214 mg, 0.50 mmol) in DCM (6 mL) at 0 ℃ was added TFA (2 mL) . The reaction mixture was warmed to room temperature and stirred for 1 h. The mixture was neutralized with NaHCO3 (aq. ) and extracted with EA (20 mL x 3) . The organic layer was washed with brine, dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give (1R, 3s, 5S) -9-azabicyclo [3.3.1] nonan-3-yl 2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxylate (159 mg, 97%) as an off-white solid.
[0477] MS (ESI) : mass calcd. for C20H24N2O2, 324.18, m / z found 325.2 [M+H] +.
[0478] Step 3
[0479] To a mixture of (1R, 5S) -9-azabicyclo [3.3.1] nonan-3-yl 2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxylate (169 mg, 0.52 mmol) and formaldehyde aqueous solution (37%, 85 mg, 1.04 mmol) in DCM (5 mL) was added NaBH (OAc) 3 (331 mg, 1.56 mmol) at room temperature. The reaction mixture was stirred for 16 h. The mixture was quenched with Na2S2O3 aq. (20 mL) and extracted with EA (20 mL x 3) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give the crude product which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm 10um; mobile phase A: water (0.1%FA) , B: Acetonitrile, 23 ~ 33%B in 10 min; flow rate: 30 mL / min; wavelength: 214 / 254 nm) to give (1R, 3s, 5S) -9-methyl-9-azabicyclo [3.3.1] nonan-3-yl 2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxylate formate (125.6 mg, 71%) as an off-white solid.
[0480] MS (ESI) : mass calcd. for C21H26N2O2, 338.20, m / z found 339.2 [M+H] +.
[0481] 1H NMR (400 MHz, CDCl3) δ 8.60 (s, 0.86H) , 8.10-7.99 (m, 1H) , 7.30-7.27 (m, 1H) , 7.25-7.18 (m, 2H) , 5.89-5.74 (m, 1H) , 4.14 (t, J = 8.0 Hz, 2H) , 3.55-3.47 (m, 2H) , 3.30 (t, J = 8.0 Hz, 2H) , 2.85 (s, 3H) , 2.73-2.62 (m, 2H) , 2.48-2.23 (m, 6H) , 2.00-1.74 (m, 4H) .
[0482] Example 24. Synthesis of I-35:
[0483] Experimental procedure:
[0484] Step 1
[0485] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (100 mg, 0.50 mmol) in dichloromethane (10 mL) and DMF (0.5 mL) was added SOCl2 (118.3 mg, 0.99 mmol) . The reaction mixture was stirred at room temperature for 3 h. The mixture was concentrated under reduced pressure to give 1H, 2H, 3H-benzo [b] pyrrolizine-9-carbonyl chloride (110 mg, crude) as a yellow solid which was used directly for the next step.
[0486] Step 2
[0487] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carbonyl chloride (100 mg, 0.46 mmol) in DCM (10 mL) were added pyridine (108.0 mg, 1.37 mmol) and 1-azabicyclo [2.2.2] octan-4-ol (57.9 mg, 0.46 mmol) . After stirring at room temperature for 16 h, the mixture was diluted with water (100 mL) and extracted with DCM (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give a residue which was purified by prep-HPLC (Xbridge prep c18 5um OBD 19*150mm, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate : 20 ml / min, wavelength: 214 / 254 nm) to give quinuclidin-4-yl 2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxylate trifluoroacetate (12.9 mg, 9%) as a grey solid.
[0488] MS (ESI) : mass calcd. for C19H22N2O2, 310.17, m / z found 311.2 [M+H] +.
[0489] 1H NMR (400 MHz, DMSO-d6) δ 9.62 (s, 0.80 H) , 7.88-7.86 (m, 1H) , 7.44-7.41 (m, 1H) , 7.20-7.15 (m, 2H) , 4.16 (t, J = 7.2 Hz, 2H) , 3.52-3.48 (m, 6H) , 3.18 (t, J = 7.6 Hz, 2H) , 2.67-2.55 (m, 2H) , 2.41-2.33 (m, 6H) .
[0490] Example 25. Synthesis of I-36:
[0491] Experimental procedure:
[0492] Step 1
[0493] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (50 mg, 0.25 mmol) , 1-azabicyclo [2.2.2] octan-4-amine (31.4 mg, 0.25 mmol) and DIEA (96.4 mg, 0.75 mmol) in DMF (5 mL) was added HATU (113.4 mg, 0.30 mmol) . After stirring at room temperature for 6 h, the mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure to give the crude product, which was purified by prep-HPLC (Xbridge prep c18 10um OBD 19*150mm / WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate: 30 ml / min, wavelength: 214 / 254 nm) to give N- (quinuclidin-4-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide formate (20.7 mg, 27%) as a yellow solid.
[0494] MS (ESI) : mass calcd. for C19H23N3O, 309.18, m / z found 310.1 [M+H] +.
[0495] 1H NMR (400 MHz, DMSO-d6) δ 8.31 (s, 1H) , 7.87-7.85 (m, 1H) , 7.36-7.34 (m, 1H) , 7.13-7.06 (m, 2H) , 6.50 (s, 1H) , 4.10 (t, J = 7.2 Hz, 2H) , 3.20 (t, J = 7.6 Hz, 2H) , 3.01 -2.97 (m, 6H) , 2.61-2.54 (m, 2H) , 2.02-1.98 (m, 6H) .
[0496] Example 26. Synthesis of I-37:
[0497] Experimental procedure:
[0498] Step 1
[0499] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (100 mg, 0.50 mmol) in dichloromethane (10 mL) and DMF (0.5 mL) was added SOCl2 (118.3 mg, 0.99 mmol) . The reaction mixture was stirred at 20 ℃ for 3 h. The mixture was concentrated under reduced pressure to give 1H, 2H, 3H-benzo [b] pyrrolizine-9-carbonyl chloride (110 mg, crude) as a yellow solid which was used directly for the next step.
[0500] Step 2
[0501] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carbonyl chloride (100 mg, 0.46 mmol) in DCM (10 mL) were added pyridine (108.0 mg, 1.37 mmol) and (3S) -1-azabicyclo [2.2.2] octan-3-ol (57.9 mg, 0.46 mmol) . The reaction mixture was stirred at 20 ℃ for 16 h. The mixture was diluted with water (100 mL) and extracted with DCM (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give a residue which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate: 30 ml / min, wavelength: 214 / 254 nm) to give (S) -quinuclidin-3-yl 2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxylate formate (17.4 mg, 12%) as a white solid.
[0502] MS (ESI) : mass calcd. for C19H22N2O2, 310.17, m / z found 311.2 [M+H] +.
[0503] 1H NMR (400 MHz, DMSO-d6) δ 8.25 (s, 0.70 H) , 7.97-7.93 (m, 1H) , 7.43-7.40 (m, 1H) , 7.20-7.15 (m, 2H) , 4.94-4.92 (m, 1H) , 4.16 (t, J = 7.2 Hz, 2H) , 3.29-3.18 (m, 2H) , 2.88-2.85 (m, 2H) , 2.75-2.57 (m, 6H) , 1.91-1.89 (m, 1H) , 1.70-1.47 (m, 4H) .
[0504] Example 27. Synthesis of I-38:
[0505] Experimental procedure:
[0506] Step 1
[0507] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (100 mg, 0.50 mmol) in dichloromethane (10 mL) and DMF (0.5 mL) was added SOCl2 (118.3 mg, 0.99 mmol) . The reaction mixture was stirred at room temperature for 2 h. The mixture was concentrated under reduced pressure to give 1H, 2H, 3H-benzo [b] pyrrolizine-9-carbonyl chloride (100 mg, crude) as a yellow solid which was used directly for the next step.
[0508] Step 2
[0509] To a solution of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carbonyl chloride (60 mg, 0.27 mmol) in DCM (5 mL) were added pyridine (64.8 mg, 0.82 mmol) and 1-azabicyclo [2.2.1] heptan-3-ol (30.9 mg, 0.27 mmol) . The reaction mixture was stirred at room temperature for 16 h. The mixture was diluted with water (100 mL) and extracted with DCM (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give a residue which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate: 30 ml / min, wavelength: 214 / 254 nm) to give 1-azabicyclo [2.2.1] heptan-3-yl 2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxylate formate (17.5 mg, 21%) as a yellow solid.
[0510] MS (ESI) : mass calcd. for C18H20N2O2, 296.15, m / z found 297.2 [M+H] +.
[0511] 1H NMR (400 MHz, DMSO-d6) δ 8.27 (s, 1H) , 7.94-7.92 (m, 1H) , 7.43-7.40 (m, 1H) , 7.20-7.15 (m, 2H) , 5.17-5.14 (m, 1H) , 4.18-4.13 (m, 2H) , 3.25-3.10 (m, 3H) , 2.85-2.81 (m, 2H) , 2.64-2.57 (m, 4H) , 2.42-2.38 (m, 1H) , 2.33-2.24 (m, 1H) , 1.90-1.86 (m, 1H) , 1.52-1.48 (m, 1H) .
[0512] Example 28. Synthesis of I-39:
[0513] Experimental procedure:
[0514] Step 1
[0515] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (54 mg, 0.26 mmol) and DIEA (157 mg, 1.21 mmol) in DMF (2 mL) was added HATU (97 mg, 0.25 mmol) in portion at 25 ℃ and the mixture was stirred for 30 min. (1R, 3S, 4S) -1-azabicyclo [2.2.1] heptan-3-amine hydrochloride (45 mg, 0.24 mmol) was added at 0 ℃ and the mixture was then stirred at 25 ℃ for 1 h. The mixture was diluted with water (20 mL) and extracted with EtOAc (20 mL x 3) . The combined organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure. The residue was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm 10um; mobile phase A: water (0.1%FA) , B: Acetonitrile, 10 ~ 45%B in 10 min; flow rate: 30 mL / min; wavelength: 214 / 254 nm) to give N- ( (1R, 3S, 4S) -1-azabicyclo [2.2.1] heptan-3-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide formate (53.7 mg, 74%) as a white solid.
[0516] MS (ESI) : mass calcd. for C18H21N3O, 295.17, m / z found 296.2 [M+H] +.
[0517] 1H NMR (400 MHz, DMSO) δ 8.17 (s, 0.23H) , 7.92-7.83 (m, 1H) , 7.47-7.32 (m, 2H) , 7.18-7.07 (m, 2H) , 4.49-4.38 (m, 1H) , 4.13 (t, J = 6.8 Hz, 2H) , 3.51 (t, J = 11.2 Hz, 1H) , 3.25 (t, J = 7.2 Hz, 2H) , 3.21-3.06 (m, 3H) , 3.03-2.94 (m, 2H) , 2.87-2.77 (m, 1H) , 2.64-2.55 (m, 2H) , 2.02-1.89 (m, 1H) , 1.85-1.77 (m, 1H) .
[0518] Example 29. Synthesis of I-40:
[0519] Experimental procedure:
[0520] Step 1
[0521] To a stirred solution of (5-methyl-1H-imidazol-4-yl) methanol (500 mg, 4.4591 mmol) in anhydrous DMF (13 mL) was added DIEA (1729.02 mg, 13.37 mmol) followed by SEMCl (892.11 mg, 5.35 mmol) . The resultant solution was heated to 80 ℃ for 3 h then cooled to room temperature. The reaction mixture was poured into brine (15 mL) and diluted with H2O (6 mL) and EA (40 mL) . The organic phase was washed with brine (20 mL x 4) , dried over Na2SO4 and concentrated under reduced pressure. Purification of the crude orange oil by flash chromatography on silica gel (DCM / MeOH / NH4OH, 95: 4: 1) provided (5-methyl-1-{[2- (trimethylsilyl) ethoxy] methyl} imidazol-4-yl) methanol (450 mg, 39.4%) .
[0522] MS (ESI) : mass calcd. for C11H22N2O2Si, 242.15, m / z found 243.2 [M+H] +.
[0523] Step 2
[0524] To a solution of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (130 mg, 0.646 mmol) in DCM (5mL) were added oxalyl chloride (246.03 mg, 1.9383 mmol) and DMF (9.44 mg, 0.1292 mmol) at 0 ℃ under N2. Then the mixture was stirred at room temperature under N2 for l h. The mixture was concentrated to get the crude product. To the solution of the above crude product in DCM (5 mL) were added (5-methyl-1- { [2-(trimethylsilyl) ethoxy] methyl} imidazol-4-yl) methanol (234.91 mg, 0.969 mmol) and TEA (130.76 mg, 1.2922 mmol) , then the mixture was stirred at 50 ℃ for 16 h under N2. The mixture was diluted with EtOAc and the precipitate was removed by filtering. The filtrate was washed with water, brine, dried over Na2SO4 and concentrated under reduced pressure to afford the crude product which was purified by silica gel chromatography column (DCM / MeOH =5: 1) to afford (5-methyl-1- { [2- (trimethylsilyl) ethoxy] methyl} imidazol-4-yl) methyl 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylate (130 mg, 47%) as red oil.
[0525] MS (ESI) : mass calcd. for C23H31N3O3Si, 425.21, m / z found 426.2 [M+H] +.
[0526] Step 3
[0527] To a solution of (5-methyl-1- { [2- (trimethylsilyl) ethoxy] methyl} imidazol-4-yl) methyl 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylate (130 mg, 0.3047 mmol) in DCM (1mL) was added TFA (2 ml) dropwise at 0 ℃ under N2 and the mixture was stirred at room temperature under N2 for 2 h. The mixture was concentrated under reduced pressure to afford a residue which was purified by prep-HPLC (Xbridge prep c18 10um OBD 19*150mm / WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) , B (Acetonitrile) , 20~50%of B in A, 10 min, Flow rate: 30ml / min, wavelength: 214 / 254 nm) to afford (5-methyl-1H-imidazol-4-yl) methyl 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylate formate (16.8 mg, 18%) as a white solid.
[0528] MS (ESI) : mass calcd. for C17H17N3O2, 295.13, m / z found 296.1 [M+H] +.
[0529] 1H NMR (400 MHz, DMSO) δ 8.17 (s, 1H) , 7.90-7.87 (m, 1H) , 7.50 (s, 1H) , 7.44-7.34 (m, 1H) , 7.21-7.08 (m, 2H) , 5.14 (s, 2H) , 4.14 (t, J = 8.0 Hz, 2H) , 3.14 (t, J = 8.0 Hz, 2H) , 2.60-2.54 (m, 2H) , 2.22 (s, 3H) .
[0530] Example 30. Synthesis of I-41:
[0531] Experimental procedure:
[0532] Step 1
[0533] To a solution of 5-methyl-1H-imidazole-4-carbaldehyde (1 g, 0.0091 mol) in DMF (20 mL) at 0 ℃ was added NaH (0.33 g, 0.014 mol) and the reaction mixture was stirred at 0 ℃ for 2 h. SEMCl (1.52 g, 9.1 mmol) was added, the reaction mixture was warmed to room temperature and stirred for 4 h. The mixture was diluted with water (200 mL) and extracted with EA (100 mL x 2) . The organic layer was concentrated to afford the crude product which was purified by silica gel column chromatography (PE: EA = 1: 1) to give 5-methyl-1- ( (2- (trimethylsilyl) ethoxy) methyl) -1H-imidazole-4-carbaldehyde (1 g, 43%) as a yellow solid.
[0534] MS (ESI) : mass calcd. for C11H20N2O2Si, 240.13, m / z found 241.1 [M+H] +.
[0535] Step 2
[0536] To a mixture of 1- [ (2-methoxyethyl) trimethyl-$l^ {5} -silyl] -5-methylimidazole-4-carbaldehyde (450 mg, 1.86 mmol) in H2O (10 mL) were added NH2OH. HCl (194.3 mg, 2.80 mmol) and Na2CO3 (592.8 mg, 5.59 mmol) . The reaction mixture was stirred at room temperature for 16 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure to give (E) -5-methyl-1- ( (2- (trimethylsilyl) ethoxy) methyl) -1H-imidazole-4-carbaldehyde oxime (450 mg, 75%) as a yellow solid which was used directly for the next step.
[0537] MS (ESI) : mass calcd. for C11H21N3O2Si, 255.14, m / z found 256.2 [M+H] +.
[0538] Step 3
[0539] To a mixture of (E) -N- ( {1- [ (2-methoxyethyl) trimethyl-$l^ {5} -silyl] -5-methylimidazol-4-yl} methylidene) hydroxylamine (400 mg, 1.56 mmol) in EtOH (10 mL) were added Raney-Ni (91.6 mg, 1.56 mmol) and NH3. H2O (54.7 mg, 1.56 mmol) . The reaction mixture was stirred at room temperature under H2 balloon for 6 h. After filtration, the filtrate was collected and concentrated in vacuo to give (5-methyl-1- ( (2-(trimethylsilyl) ethoxy) methyl) -1H-imidazol-4-yl) methanamine (200 mg, crude) as a yellow solid which was used directly for the next step.
[0540] MS (ESI) : mass calcd. for C11H23N3OSi, 241.16, m / z found 242.1 [M+H] +.
[0541] Step 4
[0542] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (120 mg, 0.60 mmol) , {1- [ (2-methoxyethyl) trimethyl-$l^ {5} -silyl] -5-methylimidazol-4-yl} methanamine (173.5 mg, 0.72 mmol) and DIEA (231.2 mg, 1.79 mmol) in DMF (10 mL) was added HATU (272.1 mg, 0.72 mmol) . After stirring at room temperature for 6 h, the mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure to give N- ( (5-methyl-1-( (2- (trimethylsilyl) ethoxy) methyl) -1H-imidazol-4-yl) methyl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide (100 mg, 32%) as a yellow solid which was used directly for the next step.
[0543] MS (ESI) : mass calcd. for C23H32N4O2Si, 424.23, m / z found 425.2 [M+H] +.
[0544] Step 5
[0545] A mixture of N- ( {1- [ (2-methoxyethyl) trimethyl-$l^ {5} -silyl] -5-methylimidazol-4-yl} methyl) -1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxamide (100 mg, 0.24 mmol) in DCM / TFA=3 / 1 (12 mL) was stirred at room temperature for 6 h. The mixture was concentrated under reduced pressure to give the crude product, which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate: 30 ml / min, wavelength: 214 / 254 nm) to give N- ( (5-methyl-1H-imidazol-4-yl) methyl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide (7.8 mg, 11%) as a white solid.
[0546] MS (ESI) : mass calcd. for C17H18N4O, 294.15, m / z found 295.2 [M+H] +.
[0547] 1H NMR (400 MHz, DMSO-d6) δ 11.42 (s, 1H) , 7.96-7.94 (m, 1H) , 7.45-7.08 (m, 5H) , 4.37-4.31 (m, 2H) , 4.10 (t, J = 7.2 Hz, 2H) , 3.21-3.19 (m, 2H) , 2.61-2.54 (m, 2H) , 2.19-2.12 (m, 3H) .
[0548] Example 31. Synthesis of I-42:
[0549] Experimental procedure:
[0550] Step 1
[0551] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (142 mg, 0.70 mmol) and DIEA (414 mg, 3.20 mmol) in DMF (2 mL) was added HATU (256 mg, 0.67 mmol) in portions at room temperature. The mixture was stirred at room temperature for 30 min. To the mixture was added hexahydropyrrolizin-7a-ylmethanamine (90 mg, 0.64 mmol) at 0 ℃ and the mixture was stirred at 25 ℃ for 1 h. The mixture was diluted with water (50 mL) and extracted with EA (50 mL x 3) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give a residue which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm 10um; mobile phase A: water (0.1%FA) , B: Acetonitrile, 20 ~ 50%B in 10 min; flow rate: 30 mL / min; wavelength: 214 / 254 nm) to give N- (hexahydropyrrolizin-7a-ylmethyl) -1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxamide formate (134.3 mg, 64%) as a white solid.
[0552] MS (ESI) : mass calcd. for C20H25N3O, 323.20, m / z found 324.2 [M+H] +.
[0553] 1H NMR (400 MHz, DMSO-d6) δ 8.35 (s, 1H) , 8.01-7.96 (m, 1H) , 7.41-7.34 (m, 1H) , 7.34-7.26 (t, J = 4.0 Hz, 1H) , 7.19-7.06 (m, 2H) , 4.12 (t, J = 8.0 Hz, 2H) , 3.44 (d, J =4.0 Hz, 2H) , 3.30-3.15 (m, 4H) , 2.90-2.74 (m, 2H) , 2.66-2.25 (m, 2H) , 2.00-1.62 (m, 8H) .
[0554] Example 32. Synthesis of I-43:
[0555] Experimental procedure:
[0556] Step 1
[0557] To a mixture of [ (2R, 7aS) -2-fluoro-hexahydropyrrolizin-7a-yl] methanol (2.0 g, 12.6 mmol) , Et3N (3.82 g, 37.8 mmol) in DCM was added MsCl (1.88 g, 16.3 mmol) dropwise at 0 ℃ under N2. The reaction mixture was stirred at room temperature under N2 for 2 h. The mixture was diluted with water and extracted with DCM. The organic layer was washed with water, brine, dried over Na2SO4, filtered and concentrated to give (2R, 7aS) -7a-(chloromethyl) -2-fluorohexahydro-1H-pyrrolizine (2.2 g, crude) which was used in next step without further purification.
[0558] MS (ESI) : mass calcd. for C8H13ClFN, 177.07, m / z found 178.1 [M+H] +.
[0559] Step 2
[0560] To a solution of (2R, 7aS) -7a- (chloromethyl) -2-fluoro-hexahydropyrrolizine (2 g, 11.3 mmol) in DMF (40 mL) was added NaN3 (3.67 g, 56.5 mmol) at room temperature under N2protection and the reaction mixture was stirred at 80 ℃ for 16 h. The mixture was diluted with EA and filtered. The filtrate was washed with water, brine and dried over Na2SO4. The organic layer was concentrated to give a residue which was purified by silica gel column chromatography (PE / EA = 2: 1) to afford (2R, 7aS) -7a- (azidomethyl) -2-fluoro-hexahydropyrrolizine (1.6 g, 77%) as yellow oil.
[0561] MS (ESI) : mass calcd. for C8H13FN4, 184.11, m / z found 185.1 [M+H] +.
[0562] Step 3
[0563] To a solution of (2R, 7aS) -7a- (azidomethyl) -2-fluoro-hexahydropyrrolizine (200 mg, 1.09 mmol) in MeOH (10 mL) was added Pd / C (40 mg) and the reaction mixture was stirred at room temperature under H2 for 4 h. The reaction mixture was filtered, and the filtrate was concentrated in vacuo to give ( (2R, 7aS) -2-fluorotetrahydro-1H-pyrrolizin-7a (5H) -yl) methanamine (200 mg, crude) which was used in the next step directly.
[0564] MS (ESI) : mass calcd. for C8H15FN2, 158.12, m / z found 159.2 [M+H] +.
[0565] Step 4
[0566] To a solution of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (100 mg, 0.50 mmol) in DCM (5mL) was added oxalyl chloride (189 mg, 1.49 mmol) and one drop of DMF at 0 ℃ under N2. Then the mixture was stirred at room temperature for l h. The reaction mixture was concentrated and redissolved in DCM and the solution was added to a mixture of [ (2R, 7aS) -2-fluoro-hexahydropyrrolizin-7a-yl] methanamine (149 mg, 0.94 mmol) and TEA (286 mg, 2.83 mmol) . The rreaction mixture was stirred at 50 ℃ for 4 h under N2 protection. The mixture was then quenched with water and extracted with DCM and the combined organic layer was washed with brine, dried over Na2SO4 and concentrated under reduced pressure to give a residue which was purified by prep-HPLC (Xbridge prep c18 10um OBD 19*150mm / WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) , B (Acetonitrile) , 20~100%of B in A, 11.5 min, Flow rate: 30ml / min, wavelength: 214 / 254 nm) to N- { [ (2R, 7aS) -2-fluoro-hexahydropyrrolizin-7a-yl] methyl} -1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxamide (38 mg, 23%) as a white solid.
[0567] MS (ESI) : mass calcd. for C20H24FN3O, 341.19, m / z found 342.2 [M+H] +.
[0568] 1H NMR (400 MHz, DMSO-d6) δ 7.87-7.85 (m, 1H) , 7.36-7.34 (m, 1H) , 7.17-7.03 (m, 2H) , 6.44 (s, 1H) , 4.87-4.74 (m, 1H) , 4.10 (t, J = 8.0 Hz, 2H) , 3.25-3.16 (m, 3H) , 3.12-2.81 (m, 4H) , 2.76-2.65 (m, 1H) , 2.64-2.53 (m, 3H) , 2.40-2.23 (m, 2H) , 2.13-2.07 (m, 1H) , 1.93-1.85 (m, 1H) , 1.39-1.31 (m, 1H) .
[0569] Example 33. Synthesis of I-44:
[0570] Experimental procedure:
[0571] Step 1
[0572] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (100 mg, 0.50 mmol) , [ (2R, 7aS) -2-fluoro-hexahydropyrrolizin-7a-yl] methanol (79.1 mg, 0.50 mmol) , CMPI (165.1 mg, 0.65 mmol) and Et3N (75.4 mg, 0.75 mmol) in DMF (10 mL) was added 4-DMAP (60.7 mg, 0.50 mmol) . The reaction mixture was stirred at 20 ℃ for 16 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The combined organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give the crude product which was purified by prep-HPLC (Xbridge prep c18 10um OBD 19*150mm / WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate: 30 ml / min, wavelength: 214 / 254 nm) to give ( (2R, 7aS) -2-fluorotetrahydro-1H-pyrrolizin-7a (5H) -yl) methyl 2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxylate formate (14.6 mg, 9%) as a white solid.
[0573] MS (ESI) : mass calcd. for C20H23FN2O2, 342.17, m / z found 343.1 [M+H] +.
[0574] 1H NMR (400 MHz, DMSO-d6) δ 8.39 (s, 0.2H) , 7.96-7.92 (m, 1H) , 7.43-7.39 (m, 1H) , 7.20-7.15 (m, 2H) , 5.34-5.21 (m, 1H) , 4.16 (t, J = 8.0 Hz, 2H) , 4.00-3.88 (m, 2H) , 3.21 (t, J = 8.0 Hz, 2H) , 3.11-3.09 (m, 2H) , 3.04 -3.02 (m, 1H) , 2.86-2.80 (m, 1H) , 2.67-2.57 (m, 2H) , 2.14-2.05 (m, 2H) , 2.01-1.98 (m, 1H) , 1.88-1.71 (m, 3H) .
[0575] Example 34. Synthesis of I-45:
[0576] Experimental procedure:
[0577] Step 1
[0578] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (40 mg, 0.20 mmol) , 1, 1-difluoro-6-azaspiro [2.5] octane (29.3 mg, 0.20 mmol) and DIEA (77.1 mg, 0.60 mmol) in DMF (5 mL) was added HATU (90.7 mg, 0.24 mmol) . The reaction mixture was stirred at room temperature for 6 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give the crude product, which was purified by prep-HPLC (Xbridge prep c18 10um OBD 19*150mm / WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate: 30 ml / min, wavelength: 214 / 254 nm) to give (1, 1-difluoro-6-azaspiro [2.5] octan-6-yl) (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) methanone (43.8 mg, 67%) as a white solid.
[0579] MS (ESI) : mass calcd. for C19H20F2N2O, 330.15, m / z found 331.1 [M+H] +.
[0580] 1H NMR (400 MHz, DMSO-d6) δ 7.55-7.53 (m, 1H) , 7.38-7.35 (m, 1H) , 7.14-7.06 (m, 2H) , 4.12 (t, J = 7.2 Hz, 2H) , 3.65-3.62 (m, 2H) , 3.52-3.44 (m, 2H) , 3.05 (t, J =7.2 Hz, 2H) , 2.61-2.51 (m, 2H) , 1.70-1.63 (m, 2H) , 1.54-1.51 (m, 2H) , 1.34 (t, J = 8.4 Hz, 2H) .
[0581] Example 35. Synthesis of I-46:
[0582] Experimental procedure:
[0583] Step 1
[0584] To a mixture of 2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxylic acid (28 mg, 0.14 mmol) and DIEA (117 mg, 0.90 mmol) in DMF (1 mL) was added HATU (52 mg, 0.13 mmol) in portion at 25 ℃. The mixture was stirred at 25 ℃ for 30 min. The mixture was added 1- (azetidin-3-yl) -4-fluoropiperidine dihydrochloride (30 mg, 0.12 mmol) at 25 ℃. The mixture was stirred at 25 ℃ for 1 h. The mixture was diluted with water (20 mL) and extracted with EA (20 mL x 3) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give the crude product. The residue was purified by Prep-HPLC (WELCH Xtimate C18 21.2*250mm 10um; mobile phase A: water (0.1%FA) , B: Acetonitrile, 15 ~ 55%B in 10 min; flow rate: 30 mL / min; wavelength: 214 / 254 nm) to give (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) (3- (4-fluoropiperidin-1-yl) azetidin-1-yl) methanone formate (43.0 mg, 96%) as a white solid.
[0585] MS (ESI) : mass calcd. for C20H24FN3O, 341.19, m / z found 342.2 [M+H] +.
[0586] 1H NMR (400 MHz, DMSO) δ 8.13 (s, 0.31H) , 7.74 (d, J=6.4 Hz, 1H) , 7.37 (d, J=6.8 Hz, 1H) , 7.24-7.00 (m, 2H) , 5.04-4.56 (m, 1H) , 4.38-4.02 (m, 5H) , 3.93-3.79 (m, 1H) , 3.20-2.96 (m, 3H) , 2.64-2.52 (m, 3H) , 2.45-2.36 (m, 1H) , 2.30-2.08 (m, 2H) , 1.96-1.59 (m, 4H) .
[0587] Example 36. Synthesis of I-47:
[0588] Experimental procedure:
[0589] Step 1
[0590] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (21 mg, 0.11 mmol) in dimethylformamide (5 mL) was added HATU (61 mg, 0.16 mmol) and DIEA (69 mg, 0.53 mmol) at 0 ℃ under N2 protection. After stirring for 30 minutes, 1- (azetidin-3-yl) -3, 3-difluoropyrrolidine dihydrochloride (25 mg, 0.11 mmol) were added into the reaction mixture. The mixture was stirred at room temperature for 2 hours. LCMS showed the reaction was completed. The mixture was extracted with EA (10 mL× 3) . The combined organic layer was washed with brine (10 mL × 2) , dried over Na2SO4 and concentrated under reduced pressure to afford crude product which was purified by Prep-HPLC ( (Xbridge prep c18 10um OBD 19*150mm / WELCH Xtimate C18 21.2*250mm 10um, Mobile phase A: H2O (0.1%FA) , phase B: ACN, 35~65%of B in A, 10 min, Flow rate: 30ml / min, wavelength: 214 / 254 nm) to give 1- [1- ( {1H, 2H, 3H-benzo [b] pyrrolizin-9-yl} carbonyl) azetidin-3-yl] -3, 3-difluoropyrrolidine formate (16.5 mg, 45%) as white solid.
[0591] MS (ESI) : mass calcd. for C19H21F2N3O, 345.17, m / z found 346.2 [M+H] +.
[0592] 1H NMR (400 MHz, DMSO) δ 8.13 (s, 0.05 H) , 7.72 (dd, J = 8.0, 4.0 Hz, 1H) , 7.36 (dd, J = 8.0, 4.0 Hz, 1H) , 7.20-7.01 (m, 2H) , 4.12 (t, J = 8.0 Hz, 4H) , 3.94-3.92 (m, 2H) , 3.10 (t, J = 8.0 Hz, 2H) , 3.04-2.73 (m, 4H) , 2.61 -2.54 (m, 3H) , 2.30-2.23 (m, 2H) .
[0593] Example 37. Synthesis of I-48:
[0594] Experimental procedure:
[0595] Step 1
[0596] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (40 mg, 0.20 mmol) , 3, 3-difluoro-1-methylpiperidin-4-amine (29.9 mg, 0.20 mmol) and DIEA (77.1 mg, 0.60 mmol) in DMF (5 mL) was added HATU (90.7 mg, 0.24 mmol) . The reaction mixture was stirred at room temperature for 6 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give the crude product, which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate: 30 ml / min, wavelength: 214 / 254 nm) to give N- (3, 3-difluoro-1-methylpiperidin-4-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide formate (36.5 mg, 52%) as a yellow solid.
[0597] MS (ESI) : mass calcd. for C18H21F2N3O, 333.17, m / z found 334.1 [M+H] +.
[0598] 1H NMR (400 MHz, DMSO-d6) δ 9.03 (s, 1H) , 8.14 (s, 0.1H) , 7.51 (d, J = 7.2 Hz, 1H) , 7.41 (d, J = 7.6 Hz, 1H) , 7.18-7.10 (m, 2H) , 4.45-4.40 (m, 1H) , 4.21 (d, J = 13.2 Hz, 1H) , 4.14 (t, J = 7.2 Hz, 2H) , 3.87-3.85 (m, 1H) , 3.72-3.61 (m, 1H) , 3.14-2.95 (m, 3H) , 2.67 2.57 (m, 5H) , 2.27-2.24 (m, 1H) , 1.75-1.65 (m, 1H) .
[0599] Example 38. Synthesis of I-49:
[0600] Experimental procedure:
[0601] Step 1
[0602] To a mixture of 2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxylic acid (27 mg, 0.13 mmol) and DIEA (109 mg, 0.84 mmol) in DMF (1 mL) was added HATU (48 mg, 0.12 mmol) in portion at 25 ℃. The mixture was stirred at 25 ℃ for 30 min. The mixture was added 1- (3, 3-difluorocyclobutyl) piperazine dihydrochloride (30 mg, 0.12 mmol) at 25 ℃. The mixture was stirred at 25 ℃ for 1 h. The mixture was diluted with water (20 mL) and extracted with EA (20 mL x 3) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give the crude product. The residue was purified by Prep-HPLC (WELCH Xtimate C18 21.2*250mm 10um; mobile phase A: water (0.1%FA) , B: Acetonitrile, 20 ~ 60%B in 10 min; flow rate: 30mL / min; wavelength: 214 / 254 nm) to give (4- (3, 3-difluorocyclobutyl) piperazin-1-yl) (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) methanone formate (29.9 mg, 68%) as a white solid.
[0603] MS (ESI) : mass calcd. for C20H23F2N3O, 359.42, m / z found 360.2 [M+H] +.
[0604] 1H NMR (400 MHz, DMSO) δ 8.13 (s, 0.09H) , 7.52 (d, J= 7.2 Hz, 1H) , 7.36 (d, J=7.2 Hz, 1H) , 7.16-7.03 (m, 2H) , 4.12 (t, J = 7.2 Hz, 2H) , 3.54 (s, 4H) , 3.03 (t, J = 7.2 Hz, 2H) , 2.78-2.54 (m, 5H) , 2.48-2.26 (m, 6H) .
[0605] Example 39. Synthesis of I-50:
[0606] Experimental procedure:
[0607] Step 1
[0608] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (40 mg, 0.20 mmol) , 4- (3, 3-difluoroazetidin-1-yl) piperidine (35.0 mg, 0.20 mmol) and DIEA (77.1 mg, 0.60 mmol) in DMF (5 mL) was added HATU (90.7 mg, 0.24 mmol) . The reaction mixture was stirred at room temperature for 6 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give the crude product, which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate: 30 ml / min, wavelength: 214 / 254 nm) to give (4- (3, 3-difluoroazetidin-1-yl) piperidin-1-yl) (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) methanone formate (25.0 mg, 35%) as a white solid.
[0609] MS (ESI) : mass calcd. for C20H23F2N3O, 359.18, m / z found 360.1 [M+H] +.
[0610] 1H NMR (400 MHz, DMSO-d6) δ 8.14 (s, 0.15H) , 7.51-7.49 (m, 1H) , 7.36 (d, J = 7.2 Hz, 1H) , 7.13-7.06 (m, 2H) , 4.11 (t, J = 7.2 Hz, 2H) , 3.94-3.92 (m, 2H) , 3.58-3.56 (m, 3H) , 3.12-3.00 (m, 4H) , 2.59-2.53 (m, 2H) , 2.50-2.33 (m, 2H) , 1.75-1.69 (m, 2H) , 1.22-1.19 (m, 2H) .
[0611] Example 40. Synthesis of I-51:
[0612] Experimental procedure:
[0613] Step 1
[0614] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (23 mg, 0.11 mmol) in dimethylformamide (5 mL) was added HATU (65 mg, 0.17 mmol) and DIEA (147 mg, 1.14 mmol) at 0 ℃ under N2 protection. After stirring for 30 minutes, 4- (3, 3-difluoropyrrolidin-1-yl) piperidine hydrochloride (30 mg, 0.11 mmol) were added into the reaction mixture. The mixture was stirred at 50 ℃ for 2 hours. LCMS showed the reaction was completed. The mixture was extracted with EA (10 mL× 3) . The combined organic layer was washed with brine (10 mL × 2) , dried over Na2SO4 and concentrated under reduced pressure to afford crude product which was purified by Prep-HPLC (Xbridge prep c18 10um OBD 19*150mm / WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) , B (Acetonitrile) , 20~60%of B in A, 10 min, Flow rate: 30ml / min, wavelength: 214 / 254 nm) to give 1- ( {1H, 2H, 3H-benzo [b] pyrrolizin-9-yl} carbonyl) -4- (3, 3-difluoropyrrolidin-1-yl) piperidine formate (27.0 mg, 63%) as light yellow solid.
[0615] MS (ESI) : mass calcd. for C21H25F2N3O, 373.20, m / z found 374.2 [M+H] +.
[0616] 1H NMR (400 MHz, DMSO) δ 8.14 (s, 0.13H) , 7.52 (d, J = 8.0 Hz, 1H) , 7.38 (d, J =8.0 Hz, 1H) , 7.19-7.06 (m, 2H) , 4.31-3.78 (m, 6H) , 3.57-3.48 (m, 2H) , 3.08-2.73 (m, 6H) , 2.62-2.54 (m, 3H) , 2.16-2.02 (m, 2H) , 1.53-1.41 (m, 2H) .
[0617] Example 41. Synthesis of I-52 &I-53:
[0618] Experimental procedure:
[0619] Step 1
[0620] To a mixture of 1- (tert-butoxycarbonyl) -5, 5-difluoropiperidine-3-carboxylic acid (150 mg, 0.56 mmol) and HOBt (114 mg, 0.84 mmol) and EDCI (162 mg, 0.84 mmol) in DMF (3 mL) was added N-hydroxy-2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboximidamide (146 mg, 0.67 mmol) at 25 ℃. The reaction mixture was stirred at 50℃ for 16 h under N2. The mixture was diluted with water (20 mL) and extracted with EA (20 mL x 3) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give the crude product which was purified by flash chromatography (mobile phase A: PE, B: EA; 0 ~ 20%of B in A) to give tert-butyl 5- (3- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -1, 2, 4-oxadiazol-5-yl) -3, 3-difluoropiperidine-1-carboxylate (120 mg, 42%) as a yellow solid. MS (ESI) : mass calcd. for C23H26F2N4O3, 444.20, m / z found 467.2 [M+Na] +.
[0621] Step 2
[0622] To a mixture of tert-butyl 5- (3- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -1, 2, 4-oxadiazol-5-yl) -3, 3-difluoropiperidine-1-carboxylate (115 mg, 0.26 mmol) in DCM (6 mL) was added 4M HCl in EA (2 mL) at 0 ℃. The reaction mixture was stirred at 25 ℃ for 1 h under N2. The mixture was concentrated under reduced pressure to give the crude product which was purified by reverse phase column (mobile phase A: H2O (0.1%HCl) , B: ACN; 0 ~55%of B in A) to give 5- (5, 5-difluoropiperidin-3-yl) -3- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -1, 2, 4-oxadiazole (50 mg, 56%) as a white solid.
[0623] MS (ESI) : mass calcd. for C18H18F2N4O, 344.14, m / z found 345.1 [M+H] +.
[0624] Step 3
[0625] 5- (5, 5-difluoropiperidin-3-yl) -3- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -1, 2, 4-oxadiazole (50 mg) was separated via chiral prep-SFC (Daicel CHIRALCEL OJ, 250mm*30 mm I.D., 10μm; mobile phase A: CO2, B: MeOH [0.2%NH3 (7M Solution in MeOH) ] , A / B=65 / 35; flow rate: 70 g / min; wavelength: 214 nm; column temperature: 35 ℃) to give (R) -5- (5, 5-difluoropiperidin-3-yl) -3- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -1, 2, 4-oxadiazole hydrochloride (peak 1, 20.1 mg, 40%) and (S) -5- (5, 5-difluoropiperidin-3-yl) -3-(2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -1, 2, 4-oxadiazole hydrochloride (peak 2, 21.4 mg, 42%) as white solids.
[0626] I-52 (peak 1)
[0627] MS (ESI) : mass calcd. for C18H18F2N4O, 344.14, m / z found 345.1 [M+H] +. 1H NMR (400 MHz, DMSO) δ 9.90 (br, 2H) , 8.03-7.96 (m, 1H) , 7.49-7.41 (m, 1H) , 7.24-7.14 (m, 2H) , 4.20 (t, J = 7.2 Hz, 2H) , 3.85-3.68 (m, 3H) , 3.63-3.44 (m, 2H) , 3.27 (t, J = 7.2 Hz, 2H) , 2.89-2.78 (m, 1H) , 2.70-2.55 (m, 3H) .
[0628] I-53 (peak 2)
[0629] MS (ESI) : mass calcd. for C18H18F2N4O, 344.14, m / z found 345.1 [M+H] +. 1H NMR (400 MHz, DMSO) δ 9.91 (br, 2H) , 8.03-7.97 (m, 1H) , 7.49-7-42 (m, 1H) , 7.25-7.14 (m, 2H) , 4.20 (t, J = 7.2 Hz, 2H) , 3.85-3.68 (m, 3H) , 3.63-3.45 (m, 2H) , 3.27 (t, J = 7.2 Hz, 2H) , 2.89-2.78 (m, 1H) , 2.70-2.55 (m, 3H) .
[0630] Example 42. Synthesis of I-54 &I-55:
[0631] Experimental procedure:
[0632] Step 1
[0633] To a solution of 1- [ (tert-butoxy) carbonyl] -5, 5-difluoropiperidine-3-carboxylic acid (120 mg, 0.45 mmol) in dimethylformamide (4 mL) was added EDCI (130 mg, 0.68 mmol) and HOBt (92 mg, 0.68 mmol) at room temperature. After stirring for 1 h, 7-fluoro-N-hydroxy-1H, 2H, 3H-benzo [b] pyrrolizine-9-carboximidamide (106 mg, 0.45 mmol) was added into the reaction mixture and the reaction mixture was stirred at room temperature for 1 h. Then the reaction mixture was stirred at 50 ℃ for 16 h. LCMS showed the reaction was completed. After reaction, the reaction mixture was quenched with water. The mixture was extracted with EA (20 mL× 3) . The combined organic layer was washed with brine (20 mL × 2) , dried over Na2SO4 and concentrated under reduced pressure to afford crude product which was purified by silica gel chromatography column (DCM / MEOH =20: 1) to afford tert-butyl 3, 3-difluoro-5- (3- {7-fluoro-1H, 2H, 3H-benzo [b] pyrrolizin-9-yl} -1, 2, 4-oxadiazol-5-yl) piperidine-1-carboxylate (120 mg, 57.4%) as white solid.
[0634] MS (ESI) : mass calcd. for C23H25F3N4O3, 462.19, m / z found 485.1 [M+Na] +.
[0635] Step 2
[0636] [Corrected under Rule 26, 11.12.2024]To a solution of tert-butyl 3, 3-difluoro-5- (3- {7-fluoro-1H, 2H, 3H-benzo [b] pyrrolizin-9-yl} -1, 2, 4-oxadiazol-5-yl) piperidine-1-carboxylate (120 mg, 0.26 mmol) in DCM (2 mL) was added HCl in EA (4 M, 2 ml) at 0℃ dropwise under N2. Then the mixture was stirred at room temperature for 2 h. The mixture was concentrated under reduced pressure to afford crude product. The residue was purified by SFC (CHIRALCEL AD, 250mm × 30 mm I.D, 10μm, Mobile phase: CO2 / MeOH [0.2%NH3 (7M Solution in MeOH) ] = 45 / 55, Flow rate : 80 g / min, Wave length: UV 214 nm, Temperature: 35℃) to give (5R) -3, 3-difluoro-5- (3- {7-fluoro-1H, 2H, 3H-benzo [b] pyrrolizin-9-yl} -1, 2, 4-oxadiazol-5-yl) piperidine (34 mg, 36.1%) as white solid and (5S) -3, 3-difluoro-5- (3- {7-fluoro-1H, 2H, 3H-benzo [b] pyrrolizin-9-yl} -1, 2, 4-oxadiazol-5-yl) piperidine (34.6 mg, 36.8%) as white solid.
[0637] I-54
[0638] MS (ESI) : mass calcd. for C18H17F3N4O, 362.14, m / z found 363.1 [M+H] +.
[0639] 1H NMR (400 MHz, DMSO) δ 9.93 (s, 1H) , 7.68 (dd, J = 12.0, 4.0 Hz, 1H) , 7.51-7.49 (m, 1H) , 7.10-7.04 (m, 1H) , 4.21 (t, J = 8.0 Hz, 2H) , 3.92-3.66 (m, 3H) , 3.64-3.45 (m, 2H) , 3.27 (t, J = 8.0 Hz, 2H) , 2.88-2.79 (s, 1H) , 2.73-2.57 (m, 3H) .
[0640] I-55
[0641] MS (ESI) : mass calcd. for C18H17F3N4O, 362.14, m / z found 363.2 [M+H] +.
[0642] 1H NMR (400 MHz, DMSO) δ 9.89 (s, 1H) , 7.68 (dd, J = 12.0, 4.0 Hz, 1H) , 7.51 -7.46 (m, 1H) , 7.09-7.04 (m, 1H) , 4.21 (t, J = 8.0 Hz, 2H) , 3.88-3.69 (m, 3H) , 3.65-3.50 (m, 2H) , 3.27 (t, J = 8.0 Hz, 2H) , 2.88-2.79 (m, 1H) , 2.72-2.57 (m, 3H) .
[0643] Example 43. Synthesis of I-56:
[0644] Experimental procedure:
[0645] Step 1
[0646] To a mixture of (3R, 4S) -1- [ (tert-butoxy) carbonyl] -3-fluoropiperidine-4-carboxylic acid (229.7 mg, 0.93 mmol) in ACN (10 mL) were added HOBT (150.7 mg, 1.11 mmol) and EDCI (213.7 mg, 1.11 mmol) . The mixture was stirred at room temperature for 1 h. N-hydroxy-1H, 2H, 3H-benzo [b] pyrrolizine-9-carboximidamide (200 mg, 0.93 mmol) was added. The reaction mixture was stirred at 80 ℃ for 3 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was concentrated under reduced pressure to afford the crude product which was purified by silica gel column chromatography (PE: EA = 1: 1) to give tert-butyl (3R, 4S) -4- (3- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -1, 2, 4-oxadiazol-5-yl) -3-fluoropiperidine-1-carboxylate (40 mg, 8%) as a yellow solid.
[0647] MS (ESI) : mass calcd. for C23H27FN4O3, 426.21, m / z found 449.2 [M+Na] .
[0648] Step 2
[0649] To a mixture of tert-butyl (3R, 4S) -4- (3- {1H, 2H, 3H-benzo [b] pyrrolizin-9-yl} -1, 2, 4-oxadiazol-5-yl) -3-fluoropiperidine-1-carboxylate (40 mg, 0.094 mmol) in HCl / EA (4N) (5 mL) was stirred at room temperature for 2 h. The mixture was concentrated under reduced pressure to give the crude product, which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate: 30 ml / min, wavelength: 214 / 254 nm) to give 3- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -5-( (3R, 4S) -3-fluoropiperidin-4-yl) -1, 2, 4-oxadiazole formate (10.4 mg, 32%) as a white solid.
[0650] MS (ESI) : mass calcd. for C18H19FN4O, 326.15, m / z found 327.1 [M+H] +.
[0651] 1H NMR (400 MHz, DMSO-d6) δ 8.19 (s, 0.8H) , 8.01-7.98 (m, 1H) , 7.45-7.43 (m, 1H) , 7.22-7.16 (m, 2H) , 5.16-5.03 (m, 1H) , 4.18 (t, J = 7.2 Hz, 2H) , 3.68-3.56 (m, 2H) , 3.28-3.19 (m, 4H) , 3.10-3.06 (m, 1H) , 2.98-2.85 (m, 1H) , 2.69-2.62 (m, 2H) , 2.08-1.97 (m, 2H) .
[0652] Example 44. Synthesis of I-57 &I-58:
[0653] Experimental procedure:
[0654] Step 1
[0655] 3- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -5- ( (3R, 4S) -3-fluoropiperidin-4-yl) -1, 2, 4-oxadiazole (8 mg, 0.025 mmol) was split via prep-SFC (Daicel CHIRALCEL ID, 250mm×30 mm I.D., 10 um mobile phase A / B: CO2 / MeOH [0.2%NH3 (7M Solution in MeOH) ] = 50 / 50, flow rate: 80 g / min, column temp: 35 degree) to give 3- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -5- ( (3S, 4R) -3-fluoropiperidin-4-yl) -1, 2, 4-oxadiazole formate (1.3 mg, 16%) as a yellow solid and 3- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -5- ( (3R, 4S) -3-fluoropiperidin-4-yl) -1, 2, 4-oxadiazole formate (1.2 mg, 15%) as a yellow solid.
[0656] MS (ESI) : mass calcd. for C18H19FN4O, 326.15, m / z found 327.1 [M+H] +.
[0657] 1H NMR (400 MHz, MeOD) δ 8.51 (s, 1H) , 8.05-8.03 (m, 1H) , 7.35-7.33 (m, 1H) , 7.21-7.14 (m, 2H) , 5.48-5.36 (m, 1H) , 4.17 (t, J = 7.2 Hz, 2H) , 3.73-3.58 (m, 2H) , 3.47-3.43 (m, 2H) , 3.38-3.31 (m, 2H) , 3.16-3.06 (m, 1H) , 2.77-2.62 (m, 2H) , 2.50-2.29 (m, 2H) .
[0658] 1H NMR (400 MHz, MeOD) δ 8.50 (s, 1H) , 8.05-8.03 (m, 1H) , 7.35-7.33 (m, 1H) , 7.20-7.14 (m, 2H) , 5.46-5.34 (m, 1H) , 4.17 (t, J = 7.2 Hz, 2H) , 3.69-3.58 (m, 2H) , 3.48-3.42 (m, 2H) , 3.38-3.31 (m, 2H) , 3.12-3.05 (m, 1H) , 2.74-2.66 (m, 2H) , 2.49-2.31 (m, 2H) .
[0659] Example 45. Synthesis of I-59:
[0660] Experimental procedure:
[0661] Step 1
[0662] To a mixture of (3R, 4S) -1- [ (tert-butoxy) carbonyl] -3-fluoropiperidine-4-carboxylic acid (265.0 mg, 1.07 mmol) in ACN (10 mL) were added HOBT (173.8 mg, 1.29 mmol) and EDCI (246.6 mg, 1.29 mmol) . The mixture was stirred at room temperature for 1 h. 7-fluoro-N-hydroxy-1H, 2H, 3H-benzo [b] pyrrolizine-9-carboximidamide (250 mg, 1.07 mmol) was added. The reaction mixture was stirred at 80 ℃ for 3 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was concentrated to afford the crude product which was purified by silica gel column chromatography (PE: EA = 1: 1) to give tert-butyl (3R, 4S) -3-fluoro-4- (3- (7-fluoro-2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -1, 2, 4-oxadiazol-5-yl) piperidine-1-carboxylate (60 mg, 10%) as a yellow solid.
[0663] MS (ESI) : mass calcd. for C23H26F2N4O3, 444.20, m / z found 467.2 [M+Na] .
[0664] Step 2
[0665] To a mixture of tert-butyl (3R, 4S) -3-fluoro-4- (3- {7-fluoro-1H, 2H, 3H-benzo [b] pyrrolizin-9-yl} -1, 2, 4-oxadiazol-5-yl) piperidine-1-carboxylate (60 mg, 0.14 mmol) in HCl / EA (4N) (5 mL) was stirred at room temperature for 2 h. The mixture was concentrated under reduced pressure to give the crude product, which was purified by Prep-HPLC (WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate: 30 ml / min, wavelength: 214 / 254 nm) to give 3- (7-fluoro-2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -5- ( (3R, 4S) -3-fluoropiperidin-4-yl) -1, 2, 4-oxadiazole formate (31.3 mg, 65%) as a yellow solid.
[0666] MS (ESI) : mass calcd. for C18H18F2N4O, 344.14, m / z found 345.1 [M+H] +.
[0667] 1H NMR (400 MHz, DMSO-d6) δ 8.19 (s, 0.7H) , 7.67 (dd, J = 10.0, 2.4 Hz, 1H) , 7.48 (dd, J = 8.8, 4.4 Hz, 1H) , 7.06 (td, J = 9.2, 2.4 Hz, 1H) , 5.18-5.06 (m, 1H) , 4.19 (t, J = 7.2 Hz, 2H) , 3.70-3.59 (m, 2H) , 3.27-3.22 (m, 3H) , 3.12-3.08 (m, 1H) , 3.01-2.88 (m, 1H) , 2.72-2.62 (m, 3H) , 2.09-2.02 (m, 2H) .
[0668] Example 46. Synthesis of I-60 &I-61:
[0669] Experimental procedure:
[0670] Step 1
[0671] 3- (7-fluoro-2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -5- ( (3R, 4S) -3-fluoropiperidin-4-yl) -1, 2, 4-oxadiazole (28 mg, 0.081 mmol) was split via prep-SFC (Daicel CHIRALCEL ID, 250mm×30 mm I.D., 10 um mobile phase A / B: CO2 / MeOH [0.2%NH3 (7M Solution in MeOH) ] = 50 / 50, flow rate: 80 g / min, column temp: 35 degree) to give 3- (7-fluoro-2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -5- ( (3S, 4R) -3-fluoropiperidin-4-yl) -1, 2, 4-oxadiazole formate (1.0 mg, 4%) as a yellow solid and 3- (7-fluoro-2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -5- ( (3R, 4S) -3-fluoropiperidin-4-yl) -1, 2, 4-oxadiazole formate (2.0 mg, 7%) as a yellow solid.
[0672] MS (ESI) : mass calcd. for C18H18F2N4O, 344.14, m / z found 345.1 [M+H] +.
[0673] 1H NMR (400 MHz, MeOD) δ 8.51 (s, 1H) , 7.75-7.68 (m, 1H) , 7.34-7.31 (m, 1H) , 6.99-6.91 (m, 1H) , 5.36-5.24 (m, 1H) , 4.18 (t, J = 7.2 Hz, 2H) , 3.65-3.50 (m, 2H) , 3.35 3.31 (m, 3H) , 3.14-2.95 (m, 2H) , 2.74-2.67 (m, 2H) , 2.43-2.23 (m, 2H) .
[0674] 1H NMR (400 MHz, MeOD) δ 8.56 (s, 1H) , 7.72-7.69 (m, 1H) , 7.33-7.30 (m, 1H) , 6.97-6.92 (m, 1H) , 5.41-5.29 (m, 1H) , 4.17 (t, J = 7.2 Hz, 2H) , 3.67-3.53 (m, 2H) , 3.40-3.31 (m, 3H) , 3.26-3.00 (m, 2H) , 2.73-2.66 (m, 2H) , 2.46-2.27 (m, 2H) .
[0675] Example 47. Synthesis of I-62:
[0676] Experimental procedure:
[0677] Step 1
[0678] To a mixture of CDMT (119 mg, 0.67 mmol) in dioxane (5 mL) was added NMM (171 mg, 1.69 mmol) at 25 ℃. After 30 min, the reaction mixture was added 1- (tert-butoxycarbonyl) -3, 3-difluoropiperidine-4-carboxylic acid (150 mg, 0.56 mmol) and stirred at 25 ℃ for 1 h. The reaction mixture was added N-hydroxy-2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboximidamide (146 mg, 0.67 mmol) and stirred at 50 ℃ for 16 h under N2. The mixture was concentrated under reduced pressure to give the crude product which was purified by Flash Chromatography (mobile phase A: PE, B: EA; 0 ~ 35%of B in A) to give tert-butyl 4- (3- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -1, 2, 4-oxadiazol-5-yl) -3, 3-difluoropiperidine-1-carboxylate (150 mg, 53%) as a yellow solid.
[0679] MS (ESI) : mass calcd. for C23H26F2N4O3, 444.20, m / z found 467.2 [M+Na] +.
[0680] Step 2
[0681] To a mixture of tert-butyl 4- (3- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -1, 2, 4-oxadiazol-5-yl) -3, 3-difluoropiperidine-1-carboxylate (120 mg, 0.27 mmol) in DCM (6 mL) was added 4M HCl in EA (2 mL) at 0 ℃. The reaction mixture was stirred at 25 ℃ for 1 h. The mixture was concentrated under reduced pressure to give the crude product which was purified by Flash reverse (mobile phase A: H2O (0.1%HCl) , B: ACN; 0 ~ 55%of B in A) to give 5- (3, 3-difluoropiperidin-4-yl) -3- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -1, 2, 4-oxadiazole hydrochloride (41.2 mg, 44%) as a white solid.
[0682] MS (ESI) : mass calcd. for C18H18F2N4O, 344.14, m / z found 345.1 [M+H] +.
[0683] 1H NMR (400 MHz, DMSO) δ 10.57-9.00 (m, 2H) , 8.03-7.94 (m, 1H) , 7.50-7.41 (m, 1H) , 7.25-7.15 (m, 2H) , 4.39-4.24 (m, 1H) , 4.20 (t, J = 7.2 Hz, 2H) , 3.99-3.88 (m, 1H) , 3.79-3.64 (m, 1H) , 3.49-3.42 (m, 1H) , 3.26 (t, J = 7.6 Hz, 2H) , 3.22-3.11 (m, 1H) , 2.70-2.60 (m, 2H) , 2.57-2.52 (m, 1H) , 2.43-2.31 (m, 1H) .
[0684] Example 48. Synthesis of I-63:
[0685] Experimental procedure:
[0686] Step 1
[0687] To a solution of 1- [ (tert-butoxy) carbonyl] -3, 3-difluoropiperidine-4-carboxylic acid (150 mg, 0.57 mmol) in dimethylformamide (5 mL) was added EDCI (163 mg, 0.85 mmol) and HOBt (115 mg, 0.85 mmol) at room temperature. After stirring for 1 h, 7-fluoro-N-hydroxy-1H, 2H, 3H-benzo [b] pyrrolizine-9-carboximidamide (211 mg, 0.90 mmol) was added into the reaction mixture and the reaction mixture was stirred at room temperature for 1 h. Then the reaction mixture was stirred at 50℃ for 16 h. LCMS showed the reaction was completed. After reaction, the reaction mixture was quenched with water. The mixture was extracted with EA (20 mL× 3) . The combined organic layer was washed with brine (20 mL ×2) ,dried over Na2SO4 and concentrated under reduced pressure to afford crude product which was purified by silica gel chromatography column (DCM / MEOH =20: 1) to afford tert-butyl 3, 3-difluoro-4- (3- {7-fluoro-1H, 2H, 3H-benzo [b] pyrrolizin-9-yl} -1, 2, 4-oxadiazol-5-yl) piperidine-1-carboxylate (100 mg, 38%) as yellow solid.
[0688] MS (ESI) : mass calcd. for C23H25F3N4O3, 462.19, m / z found 485.2 [M+Na] +.
[0689] Step 2
[0690] To a solution of tert-butyl 3, 3-difluoro-4- (3- {7-fluoro-1H, 2H, 3H-benzo [b] pyrrolizin-9-yl} -1, 2, 4-oxadiazol-5-yl) piperidine-1-carboxylate (100 mg, 0.22 mmol) in DCM (2 mL) was added HCl in EA (4 M, 2 ml) at 0 ℃ dropwise under N2. Then the mixture was stirred at room temperature for 2 h. The mixture was concentrated under reduced pressure to afford crude product. The residue was purified by Prep-HPLC (Xbridge prep c18 10um OBD 19*150mm / WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) , B (Acetonitrile) , 20~100%of B in A, 10.5 min, Flow rate: 30ml / min, wavelength: 214 / 254 nm) to 3, 3-difluoro-4- (3- {7-fluoro-1H, 2H, 3H-benzo [b] pyrrolizin-9-yl} -1, 2, 4-oxadiazol-5-yl) piperidine formate (35 mg, 43.5%) as white solid.
[0691] MS (ESI) : mass calcd. for C18H17F3N4O, 362.14, m / z found 363.2 [M+H] +.
[0692] 1H NMR (400 MHz, DMSO) δ 8.14 (s, 1H) , 7.66 (dd, J = 12.0, 4.0 Hz, 1H) , 7.48 (dd, J = 8.0, 4.0 Hz, 1H) , 7.09-7.04 (m, 1H) , 4.20 (t, J = 8.0 Hz, 2H) , 4.08 -3.96 (m, 1H) , 3.29-3.15 (m, 4H) , 3.03-2.93 (m, 2H) , 2.75-2.58 (m, 3H) , 2.19-2.04 (m, 2H) .
[0693] Example 49. Synthesis of I-64:
[0694] Experimental procedure:
[0695] Step 1
[0696] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (40 mg, 0.20 mmol) , tert-butyl 4-amino-2-azabicyclo [2.2.1] heptane-2-carboxylate (42.2 mg, 0.20 mmol) and DIEA (77.1 mg, 0.60 mmol) in DMF (5 mL) was added HATU (90.7 mg, 0.60 mmol) . The reaction mixture was stirred at room temperature for 6 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give tert-butyl 4- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamido) -2-azabicyclo [2.2.1] heptane-2-carboxylate (60 mg, crude) as a yellow solid which was used directly for the next step.
[0697] MS (ESI) : mass calcd. for C23H29N3O3, 395.22, m / z found 396.2 [M+H] +.
[0698] Step 2
[0699] To a mixture of tert-butyl 4- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamido) -2-azabicyclo [2.2.1] heptane-2-carboxylate (60 mg, 0.15 mmol) in HCl / EA (4N) (5 mL) was stirred at room temperature for 2 h. The mixture was concentrated under reduced pressure to give the crude product, which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate: 30 ml / min, wavelength: 214 / 254 nm) to give N- (2-azabicyclo [2.2.1] heptan-4-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide formate (22.2 mg, 50%) as a white solid.
[0700] MS (ESI) : mass calcd. for C18H21N3O, 295.17, m / z found 296.2 [M+H] +.
[0701] 1H NMR (400 MHz, DMSO-d6) δ 8.42 (s, 1H) , 7.91-7.89 (m, 1H) , 7.51 (s, 1H) , 7.38 -7.36 (m, 1H) , 7.15-7.08 (m, 2H) , 4.11 (t, J = 7.2 Hz, 2H) , 3.78 (s, 1H) , 3.36-3.17 (m, 4H) , 2.61-2.54 (m, 2H) , 2.09-2.03 (m, 2H) , 1.98-1.95 (m, 1H) , 1.87-1.85 (m, 3H) .
[0702] Example 50. Synthesis of I-65:
[0703] Experimental procedure:
[0704] Step 1
[0705] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (30 mg, 0.15 mmol) , tert-butyl 8, 8-difluoro-2, 6-diazaspiro [3.4] octane-2-carboxylate (37.0 mg, 0.15 mmol) and DIEA (57.8 mg, 0.45 mmol) in DMF (5 mL) was added HATU (68.0 mg, 0.18 mmol) . The reaction mixture was stirred at 50 ℃ for 12 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give tert-butyl 6- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carbonyl) -8, 8-difluoro-2, 6-diazaspiro [3.4] octane-2-carboxylate (40 mg, crude) as a yellow solid which was used directly for the next step.
[0706] MS (ESI) : mass calcd. for C23H27F2N3O3, 431.20, m / z found 432.2 [M+H] +.
[0707] Step 2
[0708] To a mixture of tert-butyl 6- ( {1H, 2H, 3H-benzo [b] pyrrolizin-9-yl} carbonyl) -8, 8-difluoro-2, 6-diazaspiro [3.4] octane-2-carboxylate (40 mg, 0.093 mmol) in HCl / EA (4N) (5 mL) was stirred at room temperature for 2 h. The mixture was concentrated under reduced pressure to give the crude product, which was purified by prep-HPLC (Xbridge prep c18 10um OBD 19*150mm / WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate: 30 ml / min, wavelength: 214 / 254 nm) to give (8, 8-difluoro-2, 6-diazaspiro [3.4] octan-6-yl) (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) methanone formate (19.1 mg, 62%) as a white solid.
[0709] MS (ESI) : mass calcd. for C18H19F2N3O, 331.15, m / z found 332.1 [M+H] +.
[0710] 1H NMR (400 MHz, DMSO-d6) δ 8.233 (s, 0.7H) , 7.59 (d, J = 7.2 Hz, 1H) , 7.39 (d, J = 7.6 Hz, 1H) , 7.16-7.09 (m, 2H) , 4.13 (t, J = 7.2 Hz, 2H) , 3.98-3.89 (m, 4H) , 3.76-3.74 (m, 2H) , 3.43-3.41 (m, 2H) , 3.08 (t, J = 7.6 Hz, 2H) , 2.62-2.55 (m, 2H) .
[0711] Example 51. Synthesis of I-66:
[0712] Experimental procedure:
[0713] Step 1
[0714] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (30 mg, 0.15 mmol) , tert-butyl 5, 5-difluoro-2, 7-diazaspiro [3.5] nonane-2-carboxylate (39.1 mg, 0.15 mmol) and DIEA (57.8 mg, 0.45 mmol) in DMF (5 mL) was added HATU (68.0 mg, 0.18 mmol) . The reaction mixture was stirred at 50 ℃ for 12 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give tert-butyl 7- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carbonyl) -5, 5-difluoro-2, 7-diazaspiro [3.5] nonane-2-carboxylate (40 mg, crude) as a yellow solid which was used directly for the next step.
[0715] MS (ESI) : mass calcd. for C24H29F2N3O3, 445.22, m / z found 446.2 [M+H] +.
[0716] Step 2
[0717] To a mixture of tert-butyl 7- ( {1H, 2H, 3H-benzo [b] pyrrolizin-9-yl} carbonyl) -5, 5-difluoro-2, 7-diazaspiro [3.5] nonane-2-carboxylate (40 mg, 0.090 mmol) in HCl / EA (4N) (5 mL) was stirred at room temperature for 2 h. The mixture was concentrated under reduced pressure to give the crude product, which was purified by prep-HPLC (Xbridge prep c18 10um OBD 19*150mm / WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate: 30 ml / min, wavelength: 214 / 254 nm) to give (5, 5-difluoro-2, 7-diazaspiro [3.5] nonan-7-yl) (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) methanone formate (18.2 mg, 57%) as a yellow solid.
[0718] MS (ESI) : mass calcd. for C19H21F2N3O, 345.17, m / z found 346.1 [M+H] +.
[0719] 1H NMR (400 MHz, DMSO-d6) δ 8.32 (s, 1H) , 7.48 (d, J = 7.2 Hz, 1H) , 7.38 (d, J =7.6 Hz, 1H) , 7.16-7.08 (m, 2H) , 4.13 (t, J = 8.0 Hz, 2H) , 3.86 (t, J = 12.0 Hz, 4H) , 3.56-3.47 (m, 4H) , 3.01 (t, J = 7.2 Hz, 2H) , 2.61-2.54 (m, 2H) , 2.04-1.99 (m, 2H) .
[0720] Example 52. Synthesis of I-67:
[0721] Experimental procedure:
[0722] Step 1
[0723] To a mixture of 2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxylic acid (40 mg, 0.20 mmol) and DIEA (117 mg, 0.90 mmol) in DMF (2 mL) was added HATU (72 mg, 0.19 mmol) at 25 ℃ under N2. After stirring for 30 min, tert-butyl 8, 8-difluoro-2, 6-diazaspiro [3.4] octane-6-carboxylate (45 mg, 0.18 mmol) was added into the reaction mixture. The mixture was stirred at 25 ℃ for 16 h. The mixture was diluted with water (20 mL) and extracted with EA (20 mL x 3) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give the crude product which was purified by Flash Chromatography (mobile phase A: PE, B: EA; 0 ~ 50%of B in A) to give tert-butyl 2- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carbonyl) -8, 8-difluoro-2, 6-diazaspiro [3.4] octane-6-carboxylate (78 mg, 89%) as a white solid.
[0724] MS (ESI) : mass calcd. for C23H27F2N3O3, 431.20, m / z found 432.2 [M+H] +.
[0725] Step 2
[0726] To a mixture of tert-butyl 2- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carbonyl) -8, 8-difluoro-2, 6-diazaspiro [3.4] octane-6-carboxylate (73 mg, 0.17 mmol) in DCM (6 mL) was added 4M HCl in EA (2 mL) at 0 ℃. The reaction mixture was stirred at 25 ℃ for 1 h. The mixture was concentrated under reduced pressure to give the crude product which was purified by Prep-HPLC (WELCH Xtimate C18 21.2*250mm 10um; mobile phase A: water (0.1%TFA) , B: Acetonitrile, 15 ~ 45%B in 9 min; flow rate: 25 mL / min; wavelength: 214 / 254 nm) to give (8, 8-difluoro-2, 6-diazaspiro [3.4] octan-2-yl) (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) methanone trifluoroacetate (15.1 mg, 26%) as a white solid.
[0727] MS (ESI) : mass calcd. for C18H19F2N3O, 331.15, m / z found 332.1 [M+H] +.
[0728] 1H NMR (400 MHz, DMSO) δ 9.43 (s, 1.77H) , 7.75-7.69 (m, 1H) , 7.43-7.36 (m, 1H) , 7.19-7.10 (m, 2H) , 4.23-4.10 (m, 6H) , 3.82-3.72 (m, 4H) , 3.10 (t, J = 7.2 Hz, 2H) , 2.63-2.55 (m, 2H) .
[0729] Example 53. Synthesis of I-68:
[0730] Experimental procedure:
[0731] Step 1
[0732] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (30 mg, 0.15 mmol) , tert-butyl 4, 4-difluoro-2, 7-diazaspiro [4.4] nonane-2-carboxylate (39.1 mg, 0.15 mmol) and DIEA (57.8 mg, 0.45 mmol) in DMF (5 mL) was added HATU (68.0 mg, 0.18 mmol) . The reaction mixture was stirred at 50 ℃ for 12 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give tert-butyl 7- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carbonyl) -4, 4-difluoro-2, 7-diazaspiro [4.4] nonane-2-carboxylate (40 mg, crude) as a yellow solid which was used directly for the next step.
[0733] MS (ESI) : mass calcd. for C24H29F2N3O3, 445.22, m / z found 446.2 [M+H] +.
[0734] Step 2
[0735] To a mixture of tert-butyl 7- ( {1H, 2H, 3H-benzo [b] pyrrolizin-9-yl} carbonyl) -4, 4-difluoro-2, 7-diazaspiro [4.4] nonane-2-carboxylate (40 mg, 0.090 mmol) in HCl / EA (4N) (5 mL) was stirred at room temperature for 2 h. The mixture was concentrated under reduced pressure to give the crude product, which was purified by prep-HPLC (Xbridge prep c18 10um OBD 19*150mm / WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%HCl) B (acetonitrile) , flow rate: 30 ml / min, wavelength: 214 / 254 nm) to give (9, 9-difluoro-2, 7-diazaspiro [4.4] nonan-2-yl) (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) methanone hydrochloride (8.5 mg, 27%) as a white solid.
[0736] MS (ESI) : mass calcd. for C19H21F2N3O, 345.17, m / z found 346.2 [M+H] +.
[0737] 1H NMR (400 MHz, DMSO-d6) δ 10.28-10.13 (m, 1H) , 7.60 (d, J = 7.2 Hz, 1H) , 7.36 (d, J = 7.6 Hz, 1H) , 7.14-7.06 (m, 2H) , 4.12 (t, J = 7.2 Hz, 2H) , 3.84-3.75 (m, 3H) , 3.70-3.57 (m, 3H) , 3.52 (s, 2H) , 3.16-2.99 (m, 2H) , 2.62-2.55 (m, 2H) , 2.23-2.07 (m, 2H) .
[0738] Example 54. Synthesis of I-69:
[0739] Experimental procedure:
[0740] Step 1
[0741] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (30 mg, 0.15 mmol) , tert-butyl 9, 9-difluoro-2, 7-diazaspiro [4.4] nonane-2-carboxylate (39.1 mg, 0.15 mmol) and DIEA (57.8 mg, 0.45 mmol) in DMF (5 mL) was added HATU (68.0 mg, 0.18 mmol) The reaction miture was stirred at 50 ℃ for 12 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give tert-butyl 7- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carbonyl) -9, 9-difluoro-2, 7-diazaspiro [4.4] nonane-2-carboxylate (40 mg, crude) as a yellow solid which was used directly for the next step.
[0742] MS (ESI) : mass calcd. for C24H29F2N3O3, 445.22, m / z found 446.2 [M+H] +.
[0743] Step 2
[0744] To a mixture of tert-butyl 7- ( {1H, 2H, 3H-benzo [b] pyrrolizin-9-yl} carbonyl) -9, 9-difluoro-2, 7-diazaspiro [4.4] nonane-2-carboxylate (40 mg, 0.090 mmol) in HCl / EA (4N) (5 mL) was stirred at room temperature for 2 h. The mixture was concentrated under reduced pressure to give the crude product, which was purified by prep-HPLC (Xbridge prep c18 10um OBD 19*150mm / WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate : 25 ml / min, wavelength: 214 / 254 nm) to give (4, 4-difluoro-2, 7-diazaspiro [4.4] nonan-2-yl) (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) methanone formate (19.1 mg, 61%) as a yellow solid.
[0745] MS (ESI) : mass calcd. for C19H21F2N3O, 345.17, m / z found 346.3 [M+H] +.
[0746] 1H NMR (400 MHz, DMSO-d6) δ 8.24 (s, 0.8H) , 7.61 (d, J = 7.2 Hz, 1H) , 7.38 (d, J = 7.2 Hz, 1H) , 7.16-7.09 (m, 2H) , 4.13 (t, J = 7.2 Hz, 2H) , 4.05-3.94 (m, 2H) , 3.74-3.65 (m, 2H) , 3.26-2.71 (m, 6H) , 2.63-2.55 (m, 2H) , 2.04-1.68 (m, 2H) .
[0747] Example 55. Synthesis of I-70:
[0748] Experimental procedure:
[0749] Step 1
[0750] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (30 mg, 0.15 mmol) , tert-butyl 4, 4-difluoro-2, 8-diazaspiro [4.5] decane-2-carboxylate (41.2 mg, 0.15 mmol) and DIEA (57.8 mg, 0.45 mmol) in DMF (5 mL) was added HATU (68.0 mg, 0.18 mmol) . The reaction mixture was stirred at 50 ℃ for 12 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give tert-butyl 8- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carbonyl) -4, 4-difluoro-2, 8-diazaspiro [4.5] decane-2-carboxylate (40 mg, crude) as a yellow solid which was used directly for the next step.
[0751] MS (ESI) : mass calcd. for C25H31F2N3O3, 459.23, m / z found 460.2 [M+H] +.
[0752] Step 2
[0753] To a mixture of tert-butyl 8- ( {1H, 2H, 3H-benzo [b] pyrrolizin-9-yl} carbonyl) -4, 4-difluoro-2, 8-diazaspiro [4.5] decane-2-carboxylate (40 mg, 0.087 mmol) in HCl / EA (4N) (5 mL) was stirred at room temperature for 2 h. The mixture was concentrated under reduced pressure to give the crude product, which was purified by prep-HPLC (Xbridge prep c18 10um OBD 19*150mm / WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate: 30 ml / min, wavelength: 214 / 254 nm) to give (4, 4-difluoro-2, 8-diazaspiro [4.5] decan-8-yl) (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) methanone formate (22.8 mg, 73%) as a white solid.
[0754] MS (ESI) : mass calcd. for C20H23F2N3O, 359.18, m / z found 360.1 [M+H] +.
[0755] 1H NMR (400 MHz, DMSO-d6) δ 8.19 (s, 0.15H) , 7.52-7.50 (m, 1H) , 7.37-7.35 (m, 1H) , 7.14-7.07 (m, 2H) , 4.12 (t, J = 7.2 Hz, 2H) , 4.00-3.97 (m, 2H) , 3.16-3.09 (m, 4H) , 3.04 (t, J = 7.2 Hz, 2H) , 2.98 (s, 2H) , 2.61-2.54 (m, 2H) , 1.62-1.55 (m, 4H) .
[0756] Example 56. Synthesis of I-71:
[0757] Experimental procedure:
[0758] Step 1
[0759] To a mixture of 1H, 2H, 3H-benzo[b]pyrrolizine-9-carboxylic acid (36 mg, 0.18 mmol) in dimethylformamide (3 mL) was added HATU (93 mg, 0.24 mmol) and DIEA (63 mg, 0.49 mmol) at 0 ℃ under N2 protection. After stirring for 30 minutes, tert-butyl 6, 6-difluoro-2, 8-diazaspiro[4.5]decane-2-carboxylate (45 mg, 0.16 mmol) were added and the reaction mixture was stirred at 50 ℃ for 16 hours. LCMS showed the reaction was completed. The mixture was extracted with EA (10 mL× 3) . The combined organic layer was washed with brine (10 mL × 2) , dried over Na2SO4 and concentrated under reduced pressure to afford crude product which was purified by flash chromatography on silica gel (PE / EA=1: 1) to give tert-butyl 8- ( {1H, 2H, 3H-benzo[b]pyrrolizin-9-yl} carbonyl) -6, 6-difluoro-2, 8-diazaspiro[4.5]decane-2-carboxylate (50.0 mg, 63%) as light yellow solid.
[0760] MS (ESI): mass calcd. for C25H31F2N3O3, 459.23, m / z found 460.3 [M+H] +.
[0761] Step 2
[0762] To a solution of tert-butyl 8- ( {1H, 2H, 3H-benzo[b]pyrrolizin-9-yl} carbonyl) -6, 6-difluoro-2, 8-diazaspiro[4.5]decane-2-carboxylate (50 mg, 0.10 mmol) in DCM (2 mL) was added HCl in EA (4 M, 2 ml)at 0 ℃ dropwise under N2. Then the mixture was stirred at room temperature for 2 h. The mixture was concentrated under reduced pressure to afford crude product which was purified by Prep-HPLC (Welch 10u C18 250 x 21.2 mm, Mobile Phase A: water (0.05%NH3) , B (Acetonitrile) , 37~47% of B in A, 9 min, Flow rate: 25ml / min, wavelength: 214 / 254 nm) to give 2- ( {1H, 2H, 3H-benzo[b]pyrrolizin-9-yl} carbonyl) -5, 5-difluoro-2, 7-diazaspiro[3.5]nonane (25.5 mg, 43.0%) as light yellow solid.
[0763] MS (ESI): mass calcd. for C20H23F2N3O, 359.18, m / z found 360.1 [M+H] +.
[0764] 1H NMR (400 MHz, DMSO) δ 9.46 (s, 1H) , 9.21 (s, 1H) , 7.51 (d, J = 8.0 Hz, 1H) , 7.39 (d, J = 8.0 Hz, 1H) , 7.19-7.07 (m, 2H) , 4.14 (t, J = 8.0 Hz, 2H) , 4.09-3.87 (m, 2H) , 3.78-3.65 (m, 1H) , 3.60-3.50 (m, 1H) , 3.33-3.30 (m, 1H) , 3.22 (d, J = 1.6 Hz, 2H) , 3.08-2.97 (m, 2H) , 2.59-2.55 (m, 3H) , 2.30-2.19 (m, 1H) , 2.03-1.82 (m, 3H) .
[0765] Example 57. Synthesis of I-72:
[0766] Experimental procedure:
[0767] Step 1
[0768] To a mixture of 2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxylic acid (36 mg, 0.18 mmol) and DIEA (105 mg, 0.81 mmol) in DMF (2 mL) was added HATU (65 mg, 0.17 mmol) at 25 ℃ under N2. After stirring for 30 min, tert-butyl 4, 4-difluoro-2, 7-diazaspiro [4.5] decane-2-carboxylate (45 mg, 0.16 mmol) was added into the reaction mixture. The mixture was stirred at 25 ℃ for 16 h. The mixture was diluted with water (20 mL) and extracted with EA (20 mL x 3) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give the crude product which was purified by Flash Chromatography (mobile phase A: PE, B: EA; 0 ~ 50%of B in A) to give tert-butyl 7- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carbonyl) -4, 4-difluoro-2, 7-diazaspiro [4.5] decane-2-carboxylate (75 mg, 95%) as a white solid.
[0769] MS (ESI) : mass calcd. for C23H31F2N3O3, 459.23, m / z found 460.2 [M+H] +.
[0770] Step 2
[0771] To a mixture of tert-butyl 7- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carbonyl) -4, 4-difluoro-2, 7-diazaspiro [4.5] decane-2-carboxylate (70 mg, 0.15 mmol) in DCM (6 mL) was added 4M HCl in EA (2 mL) at 0 ℃. The reaction mixture was stirred at 25 ℃ for 1 h. The mixture was concentrated under reduced pressure to give the crude product which was purified by Flash reverse (mobile phase A: H2O (0.1%HCl) , B: ACN; 0 ~ 35%of B in A) to give (4, 4-difluoro-2, 7-diazaspiro [4.5] decan-7-yl) (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) methanone hydrochloride (32.9 mg, 60%) as a white solid.
[0772] MS (ESI) : mass calcd. for C20H23F2N3O, 359.18, m / z found 360.3 [M+H] +.
[0773] 1H NMR (400 MHz, DMSO) δ9.83 (brs, 2H) , 7.56-7.47 (m, 1H) , 7.43-7.33 (m, 1H) , 7.18-7.05 (m, 2H) , 4.13 (t, J = 7.2 Hz, 2H) , 4.05 (d, J = 13.2 Hz, 1H) , 3.86-3.72 (m, 3H) , 3.39-3.48 (m, 3H) , 3.32-3.26 (m, 1H) , 3.12-2.97 (m, 2H) , 2.64-2.54 (m, 2H) , 1.87 -1.75 (m, 2H) , 1.73-1.64 (m, 1H) , 1.58-1.45 (m, 1H) .
[0774] Example 58. Synthesis of I-73:
[0775] Experimental procedure:
[0776] Step 1
[0777] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (38 mg, 0.19 mmol) in dimethylformamide (3 mL) was added HATU (98 mg, 0.26 mmol) and DIEA (67 mg, 0.51 mmol) at 0℃ under N2 protection. After stirring for 30 minutes, tert-butyl 5, 5-difluoro-2, 7-diazaspiro [3.5] nonane-7-carboxylate (45 mg, 0.17 mmol) were added into the reaction mixture. The mixture was stirredat 25 ℃ for 2 hours. LCMS showed the reaction was completed. The mixture was extracted with EA (10 mL× 3) . The combined organic layer was washed with brine (10 mL × 2) , dried over Na2SO4 and concentrated under reduced pressure to afford crude product which was purified by flash chromatography on silica gel (PE / EA=1: 1) to give tert-butyl 2- ( {1H, 2H, 3H-benzo [b] pyrrolizin-9-yl} carbonyl) -5, 5-difluoro-2, 7-diazaspiro [3.5] nonane-7-carboxylate (50.0 mg, 62%) as light yellow solid.
[0778] MS (ESI) : mass calcd. for C24H29F2N3O3, 445.22, m / z found 446.3 [M+H] +.
[0779] Step 2
[0780] To a solution of tert-butyl 2- ( {1H, 2H, 3H-benzo [b] pyrrolizin-9-yl} carbonyl) -5, 5-difluoro-2, 7-diazaspiro [3.5] nonane-7-carboxylate (50 mg, 0.11 mmol) in DCM (2 mL) was added HCl in EA (4 M, 2 ml) at 0℃ dropwise under N2. Then the mixture was stirred at room temperature for 2 h. The mixture was concentrated under reduced pressure to afford crude product. The residue was purified by Prep-HPLC (Xbridge prep c18 10um OBD 19*150mm / WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) , B (Acetonitrile) , 15~45%of B in A, 10 min, Flow rate: 30ml / min, wavelength: 214 / 254 nm) to 2- ( {1H, 2H, 3H-benzo [b] pyrrolizin-9-yl} carbonyl) -5, 5-difluoro-2, 7-diazaspiro [3.5] nonane formate (30 mg, 77.3%) as white solid.
[0781] MS (ESI) : mass calcd. for C19H21F2N3O, 345.17, m / z found 346.2 [M+H] +.
[0782] 1H NMR (400 MHz, DMSO) δ8.20 (s, 0.35H) , 7.76-7.69 (m, 1H) , 7.40-7.33 (m, 1H) , 7.17-7.07 (m, 2H) , 4.14-4.10 (m, 4H) , 3.81 (d, J = 8.0 Hz, 2H) , 3.11 (t, J = 8.0 Hz, 2H) , 2.84 (t, J = 12.0 Hz, 2H) , 2.63-2.51 (m, 5H) , 1.98-1.80 (m, 2H) .
[0783] Example 59. Synthesis of I-74:
[0784] Experimental procedure:
[0785] Step 1
[0786] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (30 mg, 0.15 mmol) , tert-butyl 6, 6-difluoro-2, 8-diazaspiro [4.5] decane-8-carboxylate (41.2 mg, 0.15 mmol) and DIEA (57.8 mg, 0.45 mmol) in DMF (5 mL) was added HATU (68.0 mg, 0.18 mmol) . The reaction mixture was stirred at 50 ℃ for 12 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give tert-butyl 2- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carbonyl) -6, 6-difluoro-2, 8-diazaspiro [4.5] decane-8-carboxylate (40 mg, crude) as a yellow solid which was used directly for the next step.
[0787] MS (ESI) : mass calcd. for C25H31F2N3O3, 459.23, m / z found 460.2 [M+H] +.
[0788] Step 2
[0789] To a mixture of tert-butyl 2- ( {1H, 2H, 3H-benzo [b] pyrrolizin-9-yl} carbonyl) -6, 6-difluoro-2, 8-diazaspiro [4.5] decane-8-carboxylate (40 mg, 0.087 mmol) in HCl / EA (4N) (5 mL) was stirred at room temperature for 2 h. The mixture was concentrated under reduced pressure to give the crude product, which was purified by prep-HPLC (Xbridge prep c18 10um OBD 19*150mm / WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%TFA) B (acetonitrile) , flow rate : 25 ml / min, wavelength: 214 / 254 nm) to give (6, 6-difluoro-2, 8-diazaspiro [4.5] decan-2-yl) (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) methanone trifluoroacetate (13.6 mg, 43%) as a white solid.
[0790] MS (ESI) : mass calcd. for C20H23F2N3O, 359.18, m / z found 360.0 [M+H] +.
[0791] 1H NMR (400 MHz, DMSO-d6) δ9.43 (s, 1H) , 7.57 (d, J = 7.2 Hz, 1H) , 7.37 (d, J =7.6 Hz, 1H) , 7.14-7.06 (m, 2H) , 4.12 (t, J = 7.2 Hz, 2H) , 3.86-3.83 (m, 1H) , 3.69-3.62 (m, 4H) , 3.52-3.49 (m, 1H) , 3.20-3.16 (m, 2H) , 3.05 (t, J = 7.2 Hz, 2H) , 2.61-2.54 (m, 2H) , 2.23-2.16 (m, 1H) , 2.00-1.88 (m, 3H) .
[0792] Example 60. Synthesis of I-75:
[0793] Experimental procedure:
[0794] Step 1
[0795] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (38 mg, 0.19 mmol) in dimethylformamide (3 mL) were added HATU (98 mg, 0.26 mmol) and DIEA (67 mg, 0.51 mmol) at 0℃ under N2 protection. After stirring for 30 minutes, tert-butyl 9, 9-difluoro-2, 6-diazaspiro [3.5] nonane-6-carboxylate (45 mg, 0.17 mmol) was added and the reaction mixture. was stirred at 25 ℃ for 2 hours. LCMS showed the reaction was completed. The mixture was extracted with EA (10 mL× 3) . The combined organic layer was washed with brine (10 mL × 2) , dried over Na2SO4 and concentrated under reduced pressure to afford crude product which was purified by flash chromatography on silica gel (PE / EA=3: 1) to give tert-butyl 2- ( {1H, 2H, 3H-benzo [b] pyrrolizin-9-yl} carbonyl) -9, 9-difluoro-2, 6-diazaspiro [3.5] nonane-6-carboxylate (50.0 mg, 62%) as a light yellow solid. MS (ESI) : mass calcd. for C24H29F2N3O3, 445.22, m / z found 446.2 [M+H] +.
[0796] Step 2
[0797] To a solution of tert-butyl 2- ( {1H, 2H, 3H-benzo [b] pyrrolizin-9-yl} carbonyl) -9, 9-difluoro-2, 6-diazaspiro [3.5] nonane-6-carboxylate (50 mg, 0.11 mmol) in DCM (2 mL) was added HCl in EA (4 M, 2 ml) at O ℃ dropwise under N2. Then the mixture was stirred at room temperature for 2 h. The mixture was concentrated under reduced pressure to afford a residue which was purified by prep-HPLC (Xbridge prep c18 10um OBD 19*150mm / WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) , B (Acetonitrile) , 15~45%of B in A, 10 min, Flow rate: 30ml / min, wavelength: 214 / 254 nm) to 2- ( {1H, 2H, 3H-benzo [b] pyrrolizin-9-yl} carbonyl) -9, 9-difluoro-2, 6-diazaspiro [3.5] nonane formate (28 mg, 74%) as a white solid. MS (ESI) : mass calcd. for C19H21F2N3O, 345.17, m / z found 346.3 [M+H] +.
[0798] 1H NMR (400 MHz, DMSO) δ8.14 (s, 0.51H) , 7.73 -7.71 (m, 1H) , 7.38-7.36 (m, 1H) , 7.16-7.10 (m, 2H) , 4.18-3.98 (m, 4H) , 3.83-3.81 (m, 2H) , 3.10 (t, J = 8.0 Hz, 2H) , 3.01-2.97 (m, 2H) , 2.79-2.75 (m, 2H) , 2.63-2.52 (m, 3H) , 1.91-1.82 (m, 2H) .
[0799] Example 61. Synthesis of I-76:
[0800] Experimental procedure:
[0801] Step 1
[0802] To a mixture of 2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxylic acid (28 mg, 0.14 mmol) and DIEA (83 mg, 0.64 mmol) in DMF (2 mL) was added HATU (51 mg, 0.13 mmol) at 25 ℃ under N2. After stirring for 30 min, tert-butyl 8, 8-difluoro-2, 6-diazaspiro [3.5] nonane-6-carboxylate oxalate (45 mg, 0.13 mmol) was added into the reaction mixture. The mixture was stirred at 25 ℃ for 16 h. The mixture was diluted with water (20 mL) and extracted with EA (20 mL x 3) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give the crude product which was purified by Flash Chromatography (mobile phase A: PE, B: EA; 0 ~ 75%of B in A) to give tert-butyl 2- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carbonyl) -8, 8-difluoro-2, 6-diazaspiro [3.5] nonane-6-carboxylate (57 mg, 90%) as a yellow solid.
[0803] MS (ESI) : mass calcd. for C24H29F2N3O3, 445.22, m / z found 446.2 [M+H] +.
[0804] Step 2
[0805] To a mixture of tert-butyl 2- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carbonyl) -8,8-difluoro-2, 6-diazaspiro [3.5] nonane-6-carboxylate (52 mg, 0.12 mmol) in DCM (6 mL) was added 4M HCl in EA ( (2 mL) at0 ℃. The reaction mixturewas stirred at 25℃ for 1 h. The mixture was concentrated under reduced pressure to give the crude product which was purified by Flash reverse (mobile phase A: H2O (0.1%HCl) , B: ACN; 0 ~ 35%of B in A) to give (8, 8-difluoro-2, 6-diazaspiro [3.5] nonan-2-yl) (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) methanone hydrochloride as a light yellow solid.
[0806] MS (ESI) : mass calcd. for C19H21F2N3O, 345.17, m / z found 346.1 [M+H] +.
[0807] 1H NMR (400 MHz, DMSO) δ9.84 (brs, 2H) , 7.78-7.71 (m, 1H) , 7.41-7.35 (m, 1H) , 7.18-7.09 (m, 2H) , 4.13 (t, 7.2 Hz, 2H) , 4.05 (d, J = 9.2 Hz, 2H) , 3.93 (d, J = 9.6 Hz, 2H) , 3.54 (t, 11.6 Hz, 2H) , 3.40 (s, 2H) , 3.11 (t, J = 7.2 Hz, 2H) , 2.63-2.56 (m, 2H) , 2.55-2.52 (m, 1H) , 2.48-2.44 (m, 1H) .
[0808] Example 62. Synthesis of I-77:
[0809] Experimental procedure:
[0810] Step 1
[0811] To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (30 mg, 0.15 mmol) , tert-butyl 9, 9-difluoro-2, 7-diazaspiro [4.5] decane-7-carboxylate (41.2 mg, 0.15 mmol) and DIEA (57.8 mg, 0.45 mmol) in DMF (5 mL) was added HATU (68.0 mg, 0.18 mmol) . The reaction mixture was stirred at 50℃ for 12 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give tert-butyl 2- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carbonyl) -9, 9-difluoro-2, 7-diazaspiro [4.5] decane-7-carboxylate (40 mg, crude) as a yellow solid which was used directly for the next step.
[0812] MS (ESI) : mass calcd. for C25H31F2N3O3, 459.23, m / z found 460.1 [M+H] +.
[0813] Step 2
[0814] To a mixture of tert-butyl 2- ( {1H, 2H, 3H-benzo [b] pyrrolizin-9-yl} carbonyl) -9, 9-difluoro-2, 7-diazaspiro [4.5] decane-7-carboxylate (40 mg, 0.087 mmol) in HCl / EA (4N) (5 mL) was stirred at room temperature for 2 h. The mixture was concentrated under reduced pressure to give the crude product, which was purified by prep-HPLC (Xbridge prep c18 10um OBD 19*150mm / WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate : 30 ml / min, wavelength: 214 / 254 nm) to give (9, 9-difluoro-2, 7-diazaspiro [4.5] decan-2-yl) (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) methanone formate (15.3 mg, 48%) as a white solid.
[0815] MS (ESI) : mass calcd. for C20H23F2N3O, 359.18, m / z found 360.1 [M+H] +.
[0816] 1H NMR (400 MHz, DMSO-d6) δ 8.13 (s, 0.05H) , 7.59 (d, J = 7.2 Hz, 1H) , 7.35 (d, J = 7.6 Hz, 1H) , 7.14-7.03 (m, 2H) , 4.16-4.06 (m, 2H) , 3.56-3.29 (m, 4H) , 3.10-2.98 (m, 2H) , 2.93-2.86 (m, 2H) , 2.69-2.51 (m, 4H) , 2.09-1.97 (m, 2H) , 1.92-1.70 (m, 2H) .
[0817] Example 63. Synthesis of I-78:
[0818] Experimental procedure:
[0819] Step 1
[0820] To a mixture of CDMT (114 mg, 0.65 mmol) in dioxane (5 mL) was added NMM (165 mg, 1.63 mmol) at 25℃. After stirring for 30 min, 1- (tert-butoxycarbonyl) piperidine-4-carboxylic acid (125 mg, 0.54 mmol) was added into the reaction mixture. After stirring for 1 h, N-hydroxy-2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboximidamide (140 mg, 0.65 mmol) was added into the reaction mixture. The mixture was stirred at 50 ℃ for 16 h under N2. The mixture was concentrated under reduced pressure to give the crude product which was purified by Flash Chromatography (mobile phase A: PE, B: EA; 0 ~ 35%of B in A) to give tert-butyl 4- (3- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -1, 2, 4-oxadiazol-5-yl) piperidine-1-carboxylate (80 mg, 34%) as a light yellow solid.
[0821] MS (ESI) : mass calcd. for C23H28N4O3, 408.22, m / z found 431.0 [M+Na] +.
[0822] Step 2
[0823] To a mixture of tert-butyl 4- (3- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -1, 2, 4-oxadiazol-5-yl) piperidine-1-carboxylate (80 mg, 0.19 mmol) in DCM (6 mL) was added 4M HCl in EA (2 mL) at 25 ℃. The reaction mixture was stirred at 25 ℃ for 1 h. The mixture was concentrated under reduced pressure to give the crude product which was purified by Flash reverse (mobile phase A: H2O (0.1%FA) , B: ACN; 0 ~ 35%of B in A) to give 3- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -5- (piperidin-4-yl) -1, 2, 4-oxadiazole formate (42.2 mg, 69%) as a white solid.
[0824] MS (ESI) : mass calcd. for C18H20N4O, 308.16, m / z found 309.1 [M+H] +.
[0825] 1H NMR (400 MHz, DMSO) δ8.33 (s, 1H) , 8.02-7.96 (m, 1H) , 7.47-7.40 (m, 1H) , 7.23-7.14 (m, 2H) , 4.18 (t, J = 7.2 Hz, 2H) , 3.50-3.22 (m, 3H) , 3.21-3.12 (m, 2H) , 2.89-2.76 (m, 2H) , 2.69-2.59 (m, 2H) , 2.17-2.05 (m, 2H) , 1.91-1.75 (m, 2H) .
[0826] Example 64. Synthesis of I-79:
[0827] Experimental procedure:
[0828] Step 1
[0829] To a mixture of 7-fluoro-1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (150 mg, 0.68 mmol) , {1- [ (2-methoxyethyl) trimethyl-$l^ {5} -silyl] -5-methylimidazol-4-yl} methanamine (165.9 mg, 0.68 mmol) and DIEA (265.3 mg, 2.05 mmol) in DMF (10 mL) was added HATU (312.2 mg, 0.82 mmol) . The reaction mixture was stirred at room temperature for 6 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give 7-fluoro-N- ( (5-methyl-1- ( (2- (trimethylsilyl) ethoxy) methyl) -1H-imidazol-4-yl) methyl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide (100 mg, 26%) as a yellow solid which was used directly for the next step.
[0830] MS (ESI) : mass calcd. for C23H31FN4O2Si, 442.22, m / z found 443.2 [M+H] +.
[0831] Step 2
[0832] To a mixture of 7-fluoro-N- ( {1- [ (2-methoxyethyl) trimethyl-$l^ {5} -silyl] -5-methylimidazol-4-yl} methyl) -1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxamide (100 mg, 0.23 mmol) in DCM / TFA=3 / 1 (8 mL) was stirred at room temperature for 2 h. The mixture was concentrated under reduced pressure to give the crude product, which was purified by prep-HPLC (Xbridge prep c18 10um OBD 19*150mm / WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate : 30 ml / min, wavelength: 214 / 254 nm) to give 7-fluoro-N- ( (5-methyl-1H-imidazol-4-yl) methyl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide formate (5 mg, 7%) as a white solid.
[0833] MS (ESI) : mass calcd. for C17H17FN4O, 312.14, m / z found 313.1 [M+H] +.
[0834] 1H NMR (400 MHz, DMSO-d6) δ11.64 (s, 1H) , 8.36 (s, 0.7H) , 7.70 (dd, J = 10.4, 2.4 Hz, 1H) , 7.42 (s, 1H) , 7.37 (dd, J = 8.4, 4.4 Hz, 1H) , 7.31-7.28 (m, 1H) , 6.97 (td, J = 9.2, 2.4 Hz, 1H) , 4.32 (d, J = 5.6 Hz, 2H) , 4.11 (t, J = 7.2 Hz, 2H) , 3.22 (t, J = 7.2 Hz, 2H) , 2.61-2.55 (m, 2H) , 2.16 (s, 3H) .
[0835] Example 65. Synthesis of I-80:
[0836] Experimental procedure:
[0837] Step 1
[0838] To a solution of (2R, 7aS) -7a- (azidomethyl) -2-fluoro-hexahydropyrrolizine (300 mg, 1.63 mmol) in MeOH (15 mL) was added Pd / C (60 mg) . Then the mixture was stirred at room temperature under H2 for 4 h. Pd / C was removed by filtering and the filtrate was concentrated in vacuo to give the crude product (250 mg, crude) was used in the next step directly.
[0839] MS (ESI) : mass calcd. for C8H15FN2, 158.12, m / z found 159.1 [M+H] +.
[0840] Step 2
[0841] To a solution of 7-fluoro-1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (100 mg, 0.456 mmol) in DCM (5mL) was added Oxalyl chloride (174 mg, 1.37 mmol) and DMF (6.67 mg, 0.0912 mmol) at 0℃ dropwise under N2. Then the mixture was stirred at room temperature for 0.5 h. The mixture was concentrated. The crude product was used in next step without further purification. To the solution of the above crude product in DCM (5mL) was added [ (2R, 7aS) -2-fluoro-hexahydropyrrolizin-7a-yl] methanamine (144 mg, 0.912mmol) and TEA (92 mg, 0.913 mmol) , then the mixture was stirred at 25 ℃ for 2 h under N2. The mixture was diluted with EA and the solid was removed by filtering, the filtrate was washed with water. The organic layer was washed with water, brine, dried over Na2SO4 and concentrated under reduced pressure to afford crude product. The residue was purified by Prep-HPLC (WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) , B (Acetonitrile) , 15~100%of B in A, 10 min, Flow rate: 25ml / min, wavelength: 214 / 254 nm) to N- { [ (2R, 7aS) -2-fluoro-hexahydropyrrolizin-7a-yl] methyl} -7-fluoro-1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxamide formate (45 mg, 26.6%) as white solid.
[0842] MS (ESI) : mass calcd. for C20H23F2N3O, 359.18, m / z found 360.2 [M+H] +.
[0843] 1H NMR (400 MHz, DMSO) δ8.21 (s, 0.15H) , 7.57 (dd, J = 12.0, 4.0 Hz, 1H) , 7.37 (dd, J = 8.0, 4.0 Hz, 1H) , 6.96 (td, J = 8.0, 2.4 Hz, 1H) , 6.42 (s, 1H) , 4.93-4.62 (m, 1H) , 4.11 (t, J = 8.0 Hz, 2H) , 3.27-3.14 (m, 3H) , 3.06-2.96 (m, 1H) , 2.91 (m, 1H) , 2.84-2.81 (m, 2H) , 2.71 -2.66 (m, 1H) , 2.61 -2.54 (m, 3H) , 2.38-2.24 (m, 2H) , 2.14 -2.11 (m, 1H) , 1.91-1.83 (m, 1H) , 1.37-1.34 (m, 1H) .
[0844] Example 66. Synthesis of I-81:
[0845] Experimental procedure:
[0846] Step 1
[0847] To a mixture of CDMT (85 mg, 0.48 mmol) in dioxane (6 mL) was added NMM (123 mg, 1.21 mmol) at 25 ℃. After stirring for 30 min, (3R, 4R) -1- (tert-butoxycarbonyl) -3-fluoropiperidine-4-carboxylic acid (100 mg, 0.40 mmol) was added into the reaction mixture. After stirring for 1 h, N-hydroxy-2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboximidamide (113 mg, 0.53 mmol) was added into the reaction mixture. The mixture was stirred at 50 ℃for 16 h under N2. The mixture was concentrated under reduced pressure to give the crude product which was purified by Flash Chromatography (mobile phase A: PE, B: EA; 0 ~ 20%of B in A) to give tert-butyl (3R, 4R) -4- (3- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -1, 2, 4-oxadiazol-5-yl) -3-fluoropiperidine-1-carboxylate (78 mg, 42%) as a white solid. MS (ESI) : mass calcd. for C23H27FN4O3, 426.21, m / z found 449.1 [M+Na] +.
[0848] Step 2
[0849] To a mixture of tert-butyl (3R, 4R) -4- (3- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -1, 2, 4-oxadiazol-5-yl) -3-fluoropiperidine-1-carboxylate (78 mg, 0.18 mmol) in DCM (6 mL) was added 4M HCl in EA (2 mL) at 255℃. The reaction mixture was stirred at 25 ℃ for 1 h under N2. The mixture was concentrated under reduced pressure to give the crude product which was purified by reverse phase column (column: WELCH Xtimate C18 21.2*250 mm 10 um; mobile phase A: H2O (0.1%FA) , B: ACN; 20 ~ 50%of B in A; flow rate: 30 mL / min; wavelength: 214 nm. ) to give 3- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -5-( (3R, 4R) -3-fluoropiperidin-4-yl) -1, 2, 4-oxadiazole formate (30.2 mg, 50%) as a white solid. MS (ESI) : mass calcd. for C18H19FN4O, 326.15, m / z found 327.1 [M+H] +.
[0850] 1H NMR (400 MHz, DMSO) δ 8.43 (s, 0. 18H) , 8.05 -7.93 (m, 1H) , 7.49-7.38 (m, 1H) , 7.24-7.14 (m, 2H) , 4.91-4.66 (m, 1H) , 4.19 (t, J = 6.8 Hz, 2H) , 3.48-3.40 (m, 1H) , 3.29-3.25 (m, 3H) , 2.94-2.86 (m, 1H) , 2.69-2.54 (m, 4H) , 2.12-2.00 (m, 1H) , 1.83-1.70 (m, 1H) .
[0851] Example 67. Synthesis of I-82:
[0852] Experimental procedure:
[0853] Step 1
[0854] To a mixture of CDMT (77 mg, 0.44 mmol) in dioxane (6 mL) was added NMM (110 mg, 1.09 mmol) at 25℃. After stirring for 30 min, (3R, 4S) -1- (tert-butoxycarbonyl) -3-fluoropiperidine-4-carboxylic acid (90 mg, 0.36 mmol) was added into the reaction mixture. After stirring for 1 h, N-hydroxy-2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboximidamide (102 mg, 0.47 mmol) was added into the reaction mixture. The mixture was stirred at 50℃for 16 h under N2. The mixture was concentrated under reduced pressure to give the crude product which was purified by Flash Chromatography (mobile phase A: PE, B: EA; 0 ~ 35%of B in A) to give tert-butyl (3R, 4S) -4- (3- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -1, 2, 4-oxadiazol-5-yl) -3-fluoropiperidine-1-carboxylate (58 mg, 37%) as a white solid.
[0855] MS (ESI) : mass calcd. for C23H27FN4O3, 426.21, m / z found 449.2 [M+Na] +.
[0856] Step 2
[0857] To a mixture of tert-butyl (3R, 4S) -4- (3- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -1, 2, 4-oxadiazol-5-yl) -3-fluoropiperidine-1-carboxylate (58 mg, 0.14 mmol) in DCM (3 mL) was added 4M HCl in EA (1 mL) at 25 ℃. The reaction mixture was stirred at 25 ℃ for 1 h under N2. The mixture was concentrated under reduced pressure to give the crude product which was purified by Flash reverse (mobile phase A: H2O (0.1%HCl) , B: ACN; 0 ~ 35%of B in A) to give 3- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -5- ( (3R, 4S) -3-fluoropiperidin-4-yl) -1, 2, 4-oxadiazole hydrochloride (32.3 mg, 72%) as a white solid.
[0858] MS (ESI) : mass calcd. for C18H19FN4O, 326.15, m / z found 327.1 [M+H] +.
[0859] 1H NMR (400 MHz, DMSO+D2O) δ 8.03-7.96 (m, 1H) , 7.52- 7.43 (m, 1H) , 7.29-7.18 (m, 2H) , 5.66- 5.47 (m, 1H) , 4.19 (t, J = 7.2 Hz, 2H) , 3.90- 3.67 (m, 2H) , 3.51- 3.34 (m, 2H) , 3.27 (t, J = 7.2 Hz, 2H) , 3.16 (td, J = 12.4, 4.0 Hz, 1H) , 2.70- 2.60 (m, 2H) , 2.43-2.32 (m, 2H) .
[0860] Example 68. Synthesis of I-83:
[0861] Experimental procedure:
[0862] Step 1
[0863] To a mixture of CDMT (77 mg, 0.44 mmol) in dioxane (6 mL) was added NMM (110 mg, 1.09 mmol) at 25 ℃. After stirring for 30 min, (3S, 4R) -1- (tert-butoxycarbonyl) -3-fluoropiperidine-4-carboxylic acid (90 mg, 0.36 mmol) was added into the reaction mixture. After stirring for 1 h, N-hydroxy-2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboximidamide (102 mg, 0.47 mmol) was added into the reaction mixture. The mixture was stirred at 50℃for 16 h under N2. The mixture was concentrated under reduced pressure to give the crude product which was purified by Flash Chromatography (mobile phase A: PE, B: EA; 0 ~ 35%of B in A) to give tert-butyl (3S, 4R) -4- (3- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -1, 2, 4-oxadiazol-5-yl) -3-fluoropiperidine-1-carboxylate (57 mg, 36%) as a white solid.
[0864] MS (ESI) : mass calcd. for C23H27FN4O3, 426.21, m / z found 449.2 [M+Na] +.
[0865] Step 2
[0866] To a mixture of tert-butyl (3S, 4R) -4- (3- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -1, 2, 4-oxadiazol-5-yl) -3-fluoropiperidine-1-carboxylate (57 mg, 0.13 mmol) in DCM (3 mL) was added 4M HCl in EA (1 mL) at 25 ℃. The reactionmixture was stirred at 25 ℃ for 1 h under N2. The mixture was concentrated under reduced pressure to give the crude product which was purified by Flash reverse (mobile phase A: H2O (0.1%HCl) , B: ACN; 0 ~ 35%of B in A) to give 3- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -5- ( (3S, 4R) -3-fluoropiperidin-4-yl) -1, 2, 4-oxadiazole hydrochloride (37.6 mg, 86%) as a white solid.
[0867] MS (ESI) : mass calcd. for C18H19FN4O, 326.15, m / z found 327.1 [M+H] +.
[0868] 1H NMR (400 MHz, DMSO+D2O) δ 8.03-7.96 (m, 1H) , 7.50- 7.44 (m, 1H) , 7.27-7.19 (m, 2H) , 5.64- 5.47 (m, 1H) , 4.19 (t, J = 7.2 Hz, 2H) , 3.87- 3.66 (m, 2H) , 3.51- 3.34 (m, 2H) , 3.26 (t, J = 7.2 Hz, 2H) , 3.16 (td, J = 12.4, 4.0 Hz, 1H) , 2.70- 2.61 (m, 2H) , 2.42-2.31 (m, 2H) .
[0869] Example 69. Synthesis of I-84:
[0870] Experimental procedure:
[0871] Step 1
[0872] To a solution of (2, 2-difluoro-tetrahydro-1H-pyrrolizin-7a-yl) methanol (450 mg, 2.5 mmol) and Et3N (771 mg, 7.6 mmol) in DCM (10 mL) was added MsCl (436 mg, 3.8 mmol) at O ℃ dropwise under N2. Then the mixture was stirred at room temperature under N2 for 4 h. The mixture was diluted with water (20 mL) and extracted with DCM (10 mL x 3) . The organic layer was washed with water (50 mL x 2) , brine (50 mL x 2) , dried over Na2SO4, filtered and concentrated. The crude product (450 mg, crude) was used in next step without further purification.
[0873] MS (ESI) : mass calcd. for C8H12ClF2N, 195.06, m / z found 196.1 [M+H] +.
[0874] Step 2
[0875] To a solution of 7a- (chloromethyl) -2, 2-difluoro-tetrahydro-1H-pyrrolizine (450 mg, 2.3 mmol) in DMF (8 mL) was added NaN3 (1.2 g, 18.4 mmol) at room temperature under N2 protection. The reaction was stirred at 80 ℃ for 16 h. After reaction, the mixture was diluted with EA (50 mL) and the solid was removed by filtering, the filtrate was washed with water. The organic layer was washed with water (50 mL x 2) , brine (50 mL x 2) and dried over Na2SO4. The crude product was purified by silica gel column chromatography (PE / EA = 2: 1) to afford 7a- (azidomethyl) -2, 2-difluoro-tetrahydro-1H-pyrrolizine (300 mg, 61.3%) as yellow oil.
[0876] MS (ESI) : mass calcd. for C8H12F2N4, 202.10, m / z found 203.1 [M+H] +.
[0877] Step 3
[0878] To a solution of 7a- (azidomethyl) -2, 2-difluoro-tetrahydro-1H-pyrrolizine (270 mg, 1.33 mmol) in CH3OH (10 mL) was added Pd / C (50 mg, wt%: 10%) . Then the mixture was stirred at room temperature under H2 for 4 h. Pd / C was removed by filtering and the filtrate was concentrated in vacuo to give the crude product was used in the next step directly.
[0879] MS (ESI) : mass calcd. for C8H14F2N2, 176.11, m / z found 177.2 [M+H] +.
[0880] Step 4
[0881] To a solution of 7-fluoro-1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (100 mg, 0.46 mmol) in DCM (5mL) was added Oxalyl chloride (174 mg, 1.4 mmol) and DMF (6.67 mg, 0.09 mmol) at O℃ dropwise under N2. Then the mixture was stirred at room temperature for 0.5 h. The mixture was concentrated. The crude product was used in next step without further purification. To the solution of the above crude product in DCM (5mL) was added (2, 2-difluoro-tetrahydro-1H-pyrrolizin-7a-yl) methanamine (161 mg, 0.912mmol) and TEA (138 mg, 1.37 mmol) , then the mixturee was stirred at 50℃ for 2 h under N2. The mixture was diluted with EA (50 mL) . The organic layer was washed with water (50 mL x 2) , brine (50 mL x 2) , dried over Na2SO4 and concentrated under reduced pressure to afford crude product. The residue was purified by Prep-HPLC (WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%TFA) , B (Acetonitrile) , 35~100%of B in A, 9.5 min, Flow rate: 25ml / min, wavelength: 214 / 254 nm) to N- [ (2, 2-difluoro-tetrahydro-1H-pyrrolizin-7a-yl) methyl] -7-fluoro-1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxamide (80 mg, 46.5%) as white solid.
[0882] MS (ESI) : mass calcd. for C20H22F3N3O, 377.17, m / z found 378.2 [M+H] +.
[0883] 1H NMR (400 MHz, DMSO) δ11.12 (s, 0.33H) , 7.56 (dd, J = 8.0, 2.4 Hz, 1H) , 7.41 (dd, J = 8.0, 4.0 Hz, 1H) , 7.05 (s, 1H) , 7.02- 6.92 (m, 1H) , 4.13 (t, J = 8.0 Hz, 2H) , 3.86-3.76 (m, 3H) , 3.31- 3.15 (m, 5H) , 3.06- 2.92 (m, 1H) , 2.75 -2.67 (m, 1H) , 2.62- 2.56 (m, 2H) , 2.22- 1.99 (m, 3H) , 1.79 -1.72 (m, 1H) .
[0884] Example 70. Synthesis of I-85:
[0885] Experimental procedure:
[0886] Step 1
[0887] Synthesis of tert-butyl (1R, 5S, 6s) -6- (3- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -1, 2, 4-oxadiazol-5-yl) -3-azabicyclo [3.1.0] hexane-3-carboxylate. A mixture of CDMT (97.9 mg, 0.56 mmol) and NMM (141 mg, 1.39 mmol) in dioxane (10 mL) was stirred at room temperature for 0.5 h. (1R, 5S, 6S) -3- (tert-butyl-$l^ {3} -oxy) -3-azabicyclo [3.1.0] hexane-6-carboxylic acid (106 mg, 0.46 mmol) was added. The mixture was stirred at room temperature for 0.5 h. N-hydroxy-1H, 2H, 3H-benzo [b] pyrrolizine-9-carboximidamide (100 mg, 0.46 mmol) was added. The reaction mixture was stirred at room temperature for 1 h and stirred at 70℃for 16 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was concentrated to afford the crude product which was purified by silica gel column chromatography (PE: EA = 1: 1) to give tert-butyl (1R, 5S, 6s) -6- (3- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -1, 2, 4-oxadiazol-5-yl) -3-azabicyclo [3.1.0] hexane-3-carboxylate (40 mg, 17%) as a yellow solid.
[0888] MS (ESI) : mass calcd. for C23H26N4O3, 406.20, m / z found 407.1 [M+H] +.
[0889] Step 2
[0890] Synthesis of 5- ( (1R, 5S, 6s) -3-azabicyclo [3.1.0] hexan-6-yl) -3- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -1, 2, 4-oxadiazole. A mixture of (1R, 5S, 6S) -6- (3- {1H, 2H, 3H-benzo [b] pyrrolizin-9-yl} -1, 2, 4-oxadiazol-5-yl) -3-azabicyclo [3.1.0] hexan-3-yl tert-butyl formate (40 mg, 0.098 mmol) in HCl / EA (4N) (5 mL) was stirred at room temperature for 1 h. The mixture was concentrated under reduced pressure to give the crude product, which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate : 30 ml / min, wavelength: 214 / 254 nm) to give 5- ( (1R, 5S, 6s) -3-azabicyclo [3.1.0] hexan-6-yl) -3- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -1, 2, 4-oxadiazole formate (9.4 mg, 31%) as a white solid.
[0891] MS (ESI) : mass calcd. for C18H18N4O, 306.15, m / z found 307.1 [M+H] +.
[0892] 1H NMR (400 MHz, DMSO-d6) δ8.45 (s, 0.3H) , 8.01-7.89 (m, 1H) , 7.50-7.39 (m, 1H) , 7.25- 7.10 (m, 2H) , 4.17 (t, J = 7.2 Hz, 2H) , 3.22 (t, J = 7.6 Hz, 2H) , 3.10 (d, J = 10.8 Hz, 2H) , 2.95 (d, J = 10.8 Hz, 2H) , 2.70- 2.57 (m, 2H) , 2.26- 2.19 (m, 1H) , 2.15 -2.07 (m, 2H) .
[0893] Example 71. Synthesis of I-86
[0894] Experimental procedure:
[0895] Step 1
[0896] Synthesis of tert-butyl (1R, 5S, 6r) -6- (3- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -1, 2, 4-oxadiazol-5-yl) -3-azabicyclo [3.1.0] hexane-3-carboxylate. A mixture of CDMT (97.9 mg, 0.56 mmol) and NMM (141.0 mg, 1.39 mmol) in dioxane (10 mL) was stirred at room temperature for 0.5 h. (1R, 5S, 6R) -3- (tert-butyl-$l^ {3} -oxy) -3-azabicyclo [3.1.0] hexane-6-carboxylic acid (106.1 mg, 0.46 mmol) was added. The mixture was stirred at room temperature for 0.5 h. N-hydroxy-1H, 2H, 3H-benzo [b] pyrrolizine-9-carboximidamide (100 mg, 0.46 mmol) was added. The reaction mixture was stirred at room temperature for 1 h and stirred at 70 ℃ for 16 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL x 2) . The organic layer was concentrated to afford the crude product which was purified by silica gel column chromatography (PE: EA = 1: 1) to give tert-butyl (1R, 5S, 6r) -6- (3- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -1, 2, 4-oxadiazol-5-yl) -3-azabicyclo [3.1.0] hexane-3-carboxylate (80 mg, 38%) as a yellow solid.
[0897] MS (ESI) : mass calcd. for C23H26N4O3, 406.20, m / z found 407.1 [M+H] +.
[0898] Step 2
[0899] Synthesis of 5- ( (1R, 5S, 6r) -3-azabicyclo [3.1.0] hexan-6-yl) -3- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -1, 2, 4-oxadiazole. A mixture of (1R, 5S, 6R) -6- (3- {1H, 2H, 3H-benzo [b] pyrrolizin-9-yl} -1, 2, 4-oxadiazol-5-yl) -3-azabicyclo [3.1.0] hexan-3-yl tert-butyl formate (40 mg, 0.098 mmol) in HCl / EA (4N, 5 mL) was stirred at room temperature for 1 h. The mixture was concentrated under reduced pressure to give the crude product, which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate : 30 ml / min, wavelength: 214 / 254 nm) to give 5- ( (1R, 5S, 6r) -3-azabicyclo [3.1.0] hexan-6-yl) -3- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indol-9-yl) -1,2, 4-oxadiazole formate (22.8 mg, 73%) as a white solid.
[0900] MS (ESI) : mass calcd. for C18H18N4O, 306.15, m / z found 307.1 [M+H] +.
[0901] 1H NMR (400 MHz, DMSO-d6) δ8.20 (s, 0.8H) , 7.97-7.95 (m, 1H) , 7.43- 7.41 (m, 1H) , 7.22- 7.12 (m, 2H) , 4.17 (t, J = 7.2 Hz, 2H) , 3.23 (t, J = 7.6 Hz, 2H) , 3.07 (d, J = 11.6 Hz, 2H) , 2.82 (d, J = 11.6 Hz, 2H) , 2.67- 2.59 (m, 2H) , 2.35- 2.32 (m, 1H) , 2.20- 2.18 (m, 2H) .
[0902] Example 72. Synthesis of I-87:
[0903] Experimental procedure:
[0904] Step 1
[0905] Synthesis of ( (2S, 7aR) -2-fluorotetrahydro-1H-pyrrolizin-7a (5H) -yl) methyl 2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxylate. A mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (100 mg, 0.50 mmol) , [ (2S, 7aR) -2-fluoro-hexahydropyrrolizin-7a-yl] methanol (79 mg, 0.50 mmol) , EDCI (143 mg, 0.75 mmol) and 4-DMAP (121 mg, 0.99 mmol) in DCM (10 mL) was stirred at room temperature for 16 h. The mixture was diluted with water (100 mL) and extracted with DCM (50 mL x 2) . The organic layer was concentrated to afford the crude product which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate : 30 ml / min, wavelength: 214 / 254 nm, Gradient: from 23%to 33%of B in A) to give ( (2S, 7aR) -2-fluorotetrahydro-1H-pyrrolizin-7a (5H) -yl) methyl 2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxylate formate (32.8 mg, 19%) as a white solid.
[0906] MS (ESI) : mass calcd. for C20H23FN2O2, 342.17, m / z found 343.1 [M+H] +.
[0907] 1H NMR (400 MHz, DMSO-d6) δ8.32 (s, 0.2H) , 7.98- 7.90 (m, 1H) , 7.46- 7.38 (m, 1H) , 7.25- 7.13 (m, 2H) , 5.36- 5.21 (m, 1H) , 4.17 (t, J = 7.2 Hz, 2H) , 4.00- 3.89 (m, 2H) , 3.21 (t, J = 7.6 Hz, 2H) , 3.15- 3.10 (m, 2H) , 3.04- 3.02 (m, 1H) , 2.88- 2.80 (m, 1H) , 2.69-2.56 (m, 2H) , 2.15- 2.06 (m, 2H) , 2.02- 1.72 (m, 4H) .
[0908] Example 73. Synthesis of I-88:
[0909] Experimental procedure:
[0910] Step 1
[0911] Synthesis of ( (2S, 7aS) -2-fluorotetrahydro-1H-pyrrolizin-7a (5H) -yl) methyl 2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxylate. A mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (100 mg, 0.50 mmol) , [ (2S, 7aS) -2-fluoro-hexahydropyrrolizin-7a-yl] methanol (79 mg, 0.50 mmol) , EDCI (143 mg, 0.75 mmol) and 4-DMAP (121 mg, 0.99 mmol) in DCM (10 mL) was stirred at room temperature for 16 h. The mixture was diluted with water (100 mL) and extracted with DCM (50 mL x 2) . The organic layer was concentrated to afford the crude product which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate : 30 ml / min, wavelength: 214 / 254 nm, Gradient: from 20%to 50%of B in A) to give ( (2S, 7aS) -2-fluorotetrahydro-1H-pyrrolizin-7a (5H) -yl) methyl 2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxylate formate (32.9 mg, 19%) as a white solid.
[0912] MS (ESI) : mass calcd. for C20H23FN2O2, 342.17, m / z found 343.2 [M+H] +.
[0913] 1H NMR (400 MHz, DMSO-d6) δ8.40 (s, 0.2H) , 7.95- 7.93 (m, 1H) , 7.42- 7.40 (m, 1H) , 7.18- 7.16 (m, 2H) , 5.42- 5.29 (m, 1H) , 4.16 (t, J = 7.2 Hz, 2H) , 4.00 (q, J = 10.4 Hz, 2H) , 3.33- 3.26 (m, 1H) , 3.21 (t, J = 7.6 Hz, 2H) , 2.97- 2.76 (m, 2H) , 2.67- 2.55 (m, 3H) , 2.34- 2.25 (m, 1H) , 1.98- 1.67 (m, 5H) .
[0914] Example 74. Synthesis of I-89:
[0915] Experimental procedure:
[0916] Step 1
[0917] Synthesis of (2S, 7aR) -7a- (chloromethyl) -2-fluorohexahydro-1H-pyrrolizine. To a mixture of [ (2S, 7aR) -2-fluoro-hexahydropyrrolizin-7a-yl] methanol (100 mg, 0.63 mmol) and Et3N (190.7 mg, 1.88 mmol) in DCM (10 mL) was added MsCl (86.4 mg, 0.75 mmol) at 0℃under N2. The reaction mixture was stirred at room temperature for 1 h under N2. The mixture was diluted with water (50 mL) and extracted with DCM (30 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give (2S, 7aR) -7a- (chloromethyl) -2-fluorohexahydro-1H-pyrrolizine (100 mg, crude) as a colorless oil which was used directly for the next step. MS (ESI) : mass calcd. for C8H13ClFN, 177.07, m / z found 178.1 [M+H] +.
[0918] Step 2
[0919] Synthesis of (2S, 7aR) -7a- (azidomethyl) -2-fluorohexahydro-1H-pyrrolizine. To a solution of (2S, 7aR) -7a- (chloromethyl) -2-fluoro-hexahydropyrrolizine (100 mg, 0.56 mmol) in DMF (5 mL) was added NaN3 (109.8 mg, 1.69 mmol) . The reaction mixture was stirred at 80℃ for 16 h under N2. The mixture was diluted with EA (30 mL) and the solid was removed by filtering, the filtrate was washed with water. The organic layer was washed with water, brine, dried over Na2SO4, filtered and concentrated to afford the crude product which was purified by silica gel column chromatography (PE: EA = 3: 1) to give (2S, 7aR) -7a-(azidomethyl) -2-fluorohexahydro-1H-pyrrolizine (35 mg, 30%) as a colorless oil.
[0920] MS (ESI) : mass calcd. for C8H13FN4, 184.11, m / z found 185.1 [M+H] +.
[0921] Step 3
[0922] Synthesis of ( (2S, 7aR) -2-fluorotetrahydro-1H-pyrrolizin-7a (5H) -yl) methanamine. To a solution of (2S, 7aR) -7a- (azidomethyl) -2-fluoro-hexahydropyrrolizine (35 mg, 0.19 mmol) in MeOH (5 mL) was added Pd / C (4.0 mg, 0.038 mmol) under nitrogen. The reaction mixture was stirred at room temperature for 1 h under H2. The mixture was filtered and the filtrate was concentrated in vacuo to give ( (2S, 7aR) -2-fluorotetrahydro-1H-pyrrolizin-7a (5H) -yl) methanamine (30 mg, crude) as colorless oil which was used directly for the next step without further purification. MS (ESI) : mass calcd. for C8H15FN2, 158.12, m / z found 159.1 [M+H] +.
[0923] Step 4
[0924] Synthesis of N- ( ( (2S, 7aR) -2-fluorotetrahydro-1H-pyrrolizin-7a (5H) -yl) methyl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide. To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (28 mg, 0.14 mmol) in DCM (10 mL) and DMF (0.5 mL) was added oxalyl chloride (26.5 mg, 0.21 mmol) at O℃. The reaction mixture was stirred at room temperature for 1 h and then concentrated. The crude product was used in next step without further purification. To a mixture of Et3N (41.5 mg, 0.42 mmol) and [ (2S, 7aR) -2-fluoro-hexahydropyrrolizin-7a-yl] methanamine (21.6 mg, 0.14 mmol) in DCM (10 mL) was added the above crude product in DCM (2 mL) . The reaction mixture was stirred at room temperature for 16 h. The mixture was diluted with water (50 mL) and extracted with DCM (30 mL x 2) . The organic layer was concentrated to afford the crude product which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%NH3) B (acetonitrile) , flow rate : 30 ml / min, Gradient: From 20%to 40%of B in A, wavelength: 214 / 254 nm) to give N- ( ( (2S, 7aR) -2-fluorotetrahydro-1H-pyrrolizin-7a (5H) -yl) methyl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide (2 mg, 4%) as a white solid.
[0925] MS (ESI) : mass calcd. for C20H24FN3O, 341.19, m / z found 342.2 [M+H] +.
[0926] 1H NMR (400 MHz, MeOD) δ7.85- 7.78 (m, 1H) , 7.34- 7.27 (m, 1H) , 7.19- 7.08 (m, 2H) , 4.89- 4.74 (m, 1H) , 4.12 (t, J = 7.2 Hz, 2H) , 3.50- 3.34 (m, 2H) , 3.28- 3.22 (m, 2H) , 3.18- 3.04 (m, 2H) , 3.02- 2.91 (m, 2H) , 2.84- 2.55 (m, 4H) , 2.50- 2.40 (m, 1H) , 2.27 -2.20 (m, 1H) , 2.04- 1.96 (m, 1H) , 1.52- 1.47 (m, 1H) .
[0927] Example 75. Synthesis of I-90:
[0928] Experimental procedure:
[0929] Step 1
[0930] Synthesis of (2S, 7aS) -7a- (chloromethyl) -2-fluorohexahydro-1H-pyrrolizine. To a mixture of [ (2S, 7aS) -2-fluoro-hexahydropyrrolizin-7a-yl] methanol (250 mg, 1.57 mmol) and Et3N (476.7 mg, 4.71 mmol) in DCM (10 mL) was added MsCl (215.9 mg, 1.88 mmol) at 0℃ under N2. The reaction mixture was stirred at room temperature for 1 h under N2. The mixture was diluted with water (100 mL) and extracted with DCM (50 mL x 2) . The organic layer was dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give (2S, 7aS) -7a- (chloromethyl) -2-fluorohexahydro-1H-pyrrolizine (250 mg, crude) as a colorless oil which was used directly for the next step. MS (ESI) : mass calcd. for C8H13ClFN, 177.07, m / z found 178.1 [M+H] +.
[0931] Step 2
[0932] Synthesis of (2S, 7aS) -7a- (azidomethyl) -2-fluorohexahydro-1H-pyrrolizine. To a solution of (2S, 7aS) -7a- (chloromethyl) -2-fluoro-hexahydropyrrolizine (250 mg, 1.41 mmol) in DMF (10 mL) was added NaN3 (274.5 mg, 4.22 mmol) . The reaction mixture was stirred at 80℃ for 16 h under N2. The mixture was diluted with EA (30 mL) and the solid was removed by filtering, the filtrate was washed with water. The organic layer was washed with water, brine, dried over Na2SO4, filtered and concentrated to afford the crude product which was purified by silica gel column chromatography (PE: EA = 3: 1) to give (2S, 7aS) -7a- (azidomethyl) -2-fluorohexahydro-1H-pyrrolizine (90 mg, 31%) as a colorless oil. MS (ESI) : mass calcd. for C8H13FN4, 184.11, m / z found 185.1 [M+H] +.
[0933] Step 3
[0934] Synthesis of ( (2S, 7aS) -2-fluorotetrahydro-1H-pyrrolizin-7a (5H) -yl) methanamine. To a solution of (2S, 7aS) -7a- (azidomethyl) -2-fluoro-hexahydropyrrolizine (90 mg, 0.49 mmol) in MeOH (10 mL) was added Pd / C (10.4 mg, 0.10 mmol) under nitrogen protection. The reaction mixture was stirred at room temperature for 1 h under H2. The mixture was filtered and the filtrate was concentrated in vacuo to give ( (2S, 7aS) -2-fluorotetrahydro-1H-pyrrolizin-7a (5H) -yl) methanamine (75 mg, crude) as colorless oil which was used directly for the next step. MS (ESI) : mass calcd. for C8H15FN2, 158.12, m / z found 159.1 [M+H] +.
[0935] Step 4
[0936] Synthesis of N- ( ( (2S, 7aS) -2-fluorotetrahydro-1H-pyrrolizin-7a (5H) -yl) methyl) -2,3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide. To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (92 mg, 0.46 mmol) in DCM (10 mL) and DMF (0.5 mL) was added oxalyl chloride (87.0 mg, 0.69 mmol) at 0℃. The reaction mixture was stirred at room temperature for 1 h and the mixture was concentrated. The crude product was used in next step without further purification. To a mixture of Et3N (138.2 mg, 1.37 mmol) and [ (2S, 7aS) -2-fluoro-hexahydropyrrolizin-7a-yl] methanamine (72.0 mg, 0.46 mmol) in DCM (10 mL) was added the above crude product in DCM (3 mL) . The reaction mixture was stirred at room temperature for 16 h. The mixture was diluted with water (100 mL) and extracted with DCM (50 mL x 2) . The organic layer was concentrated to afford the crude product, which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) B (acetonitrile) , flow rate : 30 ml / min, Gradient: From 17%to 47%of B in A, wavelength: 214 / 254 nm) to give N- ( ( (2S, 7aS) -2-fluorotetrahydro-1H-pyrrolizin-7a (5H) -yl) methyl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide formate (39.3 mg, 25%) as a white solid. MS (ESI) : mass calcd. for C20H24FN3O, 341.19, m / z found 342.2 [M+H] +.
[0937] 1H NMR (400 MHz, DMSO-d6) δ8.23 (s, 1H) , 7.95- 7.93 (m, 1H) , 7.37- 7.35 (m, 1H) , 7.18- 7.06 (m, 2H) , 6.88- 6.86 (m, 1H) , 5.35- 5.22 (m, 1H) , 4.11 (t, J = 7.2 Hz, 2H) , 3.32- 3.18 (m, 4H) , 3.02- 2.84 (m, 2H) , 2.82- 2.54 (m, 4H) , 2.33- 2.17 (m, 1H) , 2.03-1.89 (m, 1H) , 1.87- 1.55 (m, 4H) .
[0938] Example 76. Synthesis of I-91 &I-92:
[0939] Experimental procedure:
[0940] Step 1
[0941] Synthesis of tert-butyl 3- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamido) -9-azabicyclo [3.3.1] nonane-9-carboxylate. To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (100 mg, 0.50 mmol) , tert-butyl 3-amino-9-azabicyclo [3.3.1] nonane-9-carboxylate (119.5 mg, 0.50 mmol) and DIEA (192.7 mg, 1.49 mmol) in DMF (10 mL) was added HATU (226.8 mg, 0.60 mmol) . The reaction mixture was stirred at room temperature for 6 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL×3) . The combined organic layer was concentrated to afford the crude product which was purified by column chromatography (PE: EA = 1: 1) to give tert-butyl 3- (2, 3-dihydro-1H-pyrrolo [1, 2-a]indole-9-carboxamido) -9-azabicyclo [3.3.1] nonane-9-carboxylate (150 mg, 64%) as a yellow solid. MS (ESI) : mass calcd. for C25H33N3O3, 423.25, m / z found 368.2 [M-55] .
[0942] Step 2
[0943] Synthesis of N- (9-azabicyclo [3.3.1] nonan-3-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a]indole-9-carboxamide formate. A mixture of tert-butyl 3- {1H, 2H, 3H-benzo [b] pyrrolizine-9-amido} -9-azabicyclo [3.3.1] nonane-9-carboxylate (50 mg, 0.12 mmol) in DCM / TFA=3 / 1 (8 mL) was stirred at room temperature for 2 h. The mixture was concentrated to afford the crude product, which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm*10um, Mobile phase A: water (0.1%FA) , B: acetonitrile, flow rate : 30 ml / min, gradient: from 20%to 40%of B in A, wavelength: 214 / 254 nm) to give N- (9-azabicyclo [3.3.1] nonan-3-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide formate (26.4 mg, 69%) as a white solid. MS (ESI) : mass calcd. for C20H25N3O, 323.20, m / z found 324.2 [M+H] +. 1H NMR (400 MHz, DMSO-d6) δ8.40 (s, 0.75H) , 7.93- 7.91 (m, 1H) , 7.37 7.35 (m, 1H) , 7.17- 7.06 (m, 2H) , 6.95 (d, J = 8.4 Hz, 1H) , 4.35- 4.27 (m, 1H) , 4.11 (t, J = 7.2 Hz, 2H) , 3.64- 3.61 (m, 2H) , 3.23 (t, J = 7.6 Hz, 2H) , 2.62- 2.55 (m, 2H) , 2.27- 2.20 (m, 2H) , 2.10- 2.03 (m, 1H) , 1.79- 1.72 (m, 2H) , 1.60- 1.46 (m, 5H) .
[0944] Step 3
[0945] Synthesis of N- (9-ethyl-9-azabicyclo [3.3.1] nonan-3-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide formate. To a mixture of N- {9-azabicyclo [3.3.1] nonan-3-yl} -1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxamide (80 mg, 0.25 mmol) and acetaldehyde (5.0M solution in THF, 0.1 mL) in MeOH (10 mL) was added HOAc (0.1 mL) . The reaction mixture was stirred at room temperature for 4 h. NaBH3CN (46.6 mg, 0.74 mmol) was added. The reaction mixture was stirred at room temperature for 12 h. The mixture was concentrated to afford the crude product which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm*10um, Mobile phase A: water (0.1%FA) , B: acetonitrile, flow rate: 30 ml / min, gradient: from 15%to 45%of B in A, wavelength: 214 / 254 nm) to give N- (9-ethyl-9-azabicyclo [3.3.1] nonan-3-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide formate (34.7 mg, 40%) as a white solid. MS (ESI) : mass calcd. for C22H29N3O, 351.23, m / z found 352.2 [M+H] +. 1H NMR (400 MHz, DMSO-d6) δ8.16 (s, 0.55H) , 7.93 -7.91 (m, 1H) , 7.37 -7.35 (m, 1H) , 7.16 -7.05 (m, 2H) , 6.92 (d, J = 8.4 Hz, 1H) , 4.46 -4.38 (m, 1H) , 4.11 (t, J =7.2 Hz, 2H) , 3.41 -3.38 (m, 2H) , 3.23 (t, J = 8.0 Hz, 2H) , 2.94 -2.92 (m, 2H) , 2.66 -2.54 (m, 2H) , 2.31 -2.26 (m, 2H) , 2.22 -2.09 (m, 1H) , 1.97 -1.84 (m, 2H) , 1.66 -1.61 (m, 2H) , 1.49 -1.45 (m, 1H) , 1.18 -1.15 (m, 2H) , 1.19 (t, J = 7.2 Hz, 3H) .
[0946] Example 77. Synthesis of I-93:
[0947] Experimental procedure:
[0948] Step 1
[0949] Synthesis of N- (9-propyl-9-azabicyclo [3.3.1] nonan-3-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide formate. To a mixture of N- {9-azabicyclo [3.3.1] nonan-3-yl} -1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxamide (80 mg, 0.25 mmol) and propionaldehyde (0.1 mL) in MeOH (10 mL) was added HOAc (0.1 mL) . The reaction mixture was stirred at room temperature for 4 h. NaBH3CN (46.6 mg, 0.74 mmol) was added, and the reaction mixture was stirred at room temperature for 12 h. The mixture was concentrated to afford the crude product which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm*10um, Mobile phase A: water (0.1%FA) , B: acetonitrile, flow rate: 30 mL / min, gradient: from 15%to 45%of B in A, wavelength: 214 / 254 nm) to give N-(9-propyl-9-azabicyclo [3.3.1] nonan-3-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide formate (46.5 mg, 51%) as a white solid. MS (ESI) : mass calcd. for C23H31N3O, 365.25, m / z found 366.2 [M+H] +. 1H NMR (400 MHz, DMSO-d6) δ8.14 (s, 0.27H) , 7.99 7.87 (m, 1H) , 7.43- 7.31 (m, 1H) , 7.19- 7.05 (m, 2H) , 7.00- 6.98 (m, 1H) , 4.48 (s, 1H) , 4.11 (t, J = 7.2 Hz, 2H) , 3.51 (s, 2H) , 3.24 (t, J = 7.2 Hz, 2H) , 2.96 (s, 2H) , 2.65- 2.55 (m, 2H) , 2.41- 2.29 (m, 2H) , 2.19- 2.12 (m, 1H) , 1.99- 1.93 (m, 2H) , 1.75- 1.63 (m, 2H) , 1.61 1.43 (m, 3H) , 1.29- 1.27 (m, 2H) , 0.92 (t, J = 8.0 Hz, 3H) .
[0950] Example 78. Synthesis of I-94:
[0951] Experimental procedure:
[0952] Step 1
[0953] Synthesis of N- (9-cyclopropyl-9-azabicyclo [3.3.1] nonan-3-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide. To a mixture of N- {9-azabicyclo [3.3.1] nonan-3-yl} -1H,2H, 3H-benzo [b] pyrrolizine-9-carboxamide (70 mg, 0.22 mmol) , (1-ethoxycyclopropoxy) trimethylsilane (377.2 mg, 2.16 mmol) , HOAc (0.1 mL) and NaBH3CN (68.0 mg, 1.08 mmol) in THF (10 mL) was stirred at 60 ℃ for 16 h. The mixture was concentrated to afford the crude product which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm*10um, Mobile phase A: water (0.1%NH3) , B: acetonitrile, flow rate: 30 ml / min, gradient: from 65%to 95%of B in A, wavelength: 214 / 254 nm) to give N-(9-cyclopropyl-9-azabicyclo [3.3.1] nonan-3-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide (11.9 mg, 15%) as a white solid. MS (ESI) : mass calcd. for C23H29N3O, 363.23, m / z found 364.2 [M+H] +. 1H NMR (400 MHz, DMSO-d6) δ7.91- 7.89 (m, 1H) , 7.35-7.33 (m, 1H) , 7.16- 7.02 (m, 2H) , 6.76 (d, J = 8.8 Hz, 1H) , 4.22- 4.12 (m, 1H) , 4.10 (t, J =7.2 Hz, 2H) , 3.22 (t, J = 7.6 Hz, 2H) , 3.15 (d, J = 10.4 Hz, 2H) , 2.60- 2.55 (m, 2H) , 2.37-2.32 (m, 1H) , 2.19- 2.12 (m, 2H) , 1.94- 1.88 (m, 2H) , 1.48- 1.43 (m, 3H) , 1.23 (s, 1H) , 1.03 (d, J = 12.4 Hz, 2H) , 0.49- 0.39 (m, 2H) , 0.29- 0.20 (m, 2H) .
[0954] Example 79. Synthesis of I-95:
[0955] Experimental procedure:
[0956] Step 1
[0957] Synthesis of N- (9- (2-fluoroethyl) -9-azabicyclo [3.3.1] nonan-3-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide. To a mixture of N- {9-azabicyclo [3.3.1] nonan-3-yl} -1H,2H, 3H-benzo [b] pyrrolizine-9-carboxamide (50 mg, 0.15 mmol) and 1-fluoro-2-iodoethane (53.8 mg, 0.31 mmol) in ACN (10 mL) was added DIEA (60.0 mg, 0.46 mmol) . The reaction mixture was stirred at 80℃ for 16 h. The mixture was concentrated to afford the crude product which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%NH3) , B: acetonitrile, flow rate: 30 mL / min, gradient: from 55%to 85%of B in A, wavelength: 214 / 254 nm) to give N- (9- (2-fluoroethyl) -9-azabicyclo [3.3.1] nonan-3-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide (18.5 mg, 31%) as a white solid. MS (ESI) : mass calcd. for C22H28FN3O, 369.22, m / z found 370.2 [M+H] +. 1H NMR (400 MHz, DMSO-d6) δ7.93- 7.91 (m, 1H) , 7.36- 7.34 (m, 1H) , 7.15-7.04 (m, 2H) , 6.77 (d, J = 8.8 Hz, 1H) , 4.50- 4.36 (m, 2H) , 4.33- 4.23 (m, 1H) , 4.10 (t, J =7.2 Hz, 2H) , 3.23 (t, J = 7.6 Hz, 2H) , 3.10 (d, J = 10.8 Hz, 2H) , 2.95- 2.86 (m, 2H) , 2.61-2.54 (m, 2H) , 2.25- 2.06 (m, 3H) , 1.85- 1.75 (m, 2H) , 1.54- 1.39 (m, 3H) , 1.00 (d, J = 13.2 Hz, 2H) .
[0958] Example 80. Synthesis of I-96:
[0959] Experimental procedure:
[0960] Step 1
[0961] Synthesis of N- (9- ( (1-fluorocyclopropyl) methyl) -9-azabicyclo [3.3.1] nonan-3-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide trifluoroacetate. To a mixture of N- {9-azabicyclo [3.3.1] nonan-3-yl} -1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxamide (80 mg, 0.25 mmol) and 1-fluorocyclopropane-1-carbaldehyde (43.6 mg, 0.50 mmol) in MeOH (10 mL) was added HOAc (0.1 mL) . The reaction mixture was stirred at room temperature for 4 h. NaBH3CN (46.6 mg, 0.74 mmol) was then added, and the reaction mixture was stirred at 60 ℃ for 12 h. The mixture was concentrated to afford the crude product which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm 10um, mobile phase A: water (0.1%TFA) , B: acetonitrile, flow rate: 30 mL / min, gradient: from 22%to 40%of B in A, wavelength: 214 / 254 nm) to give N- (9- ( (1-fluorocyclopropyl) methyl) -9-azabicyclo [3.3.1] nonan-3-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide trifluoroacetate (11.4 mg, 12%) as a white solid. MS (ESI) : mass calcd. for C24H30FN3O, 395.24, m / z found 396.2 [M+H] +. 1H NMR (400 MHz, DMSO-d6) δ8.77 (s, 0.77H) , 7.94-7.92 (m, 1H) , 7.39- 7.37 (m, 1H) , 7.25- 7.07 (m, 3H) , 4.72- 4.35 (m, 1H) , 4.13 (t, J = 7.2 Hz, 2H) , 3.92- 3.80 (m, 4H) , 3.25 (t, J = 7.6 Hz, 2H) , 2.67- 2.54 (m, 4H) , 2.28- 2.06 (m, 3H) , 1.92- 1.75 (m, 2H) , 1.57- 1.47 (m, 3H) , 1.25- 1.19 (m, 2H) , 1.08- 1.02 (m, 2H) .
[0962] Example 81. Synthesis of I-97:
[0963] Experimental procedure:
[0964] Step 1
[0965] Synthesis of N- (9- (cyclobutylmethyl) -9-azabicyclo [3.3.1] nonan-3-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide formate. To a mixture of N- {9-azabicyclo [3.3.1] nonan-3-yl} -1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxamide (80 mg, 0.25 mmol) and cyclobutanecarboxaldehyde (41.6 mg, 0.50 mmol) in MeOH (10 mL) was added HOAc (0.1 mL) . The reaction mixture was stirred at room temperature for 4 h. NaBH3CN (46.6 mg, 0.74 mmol) was then added and the reaction mixture was stirred at room temperature for 12 h. The mixture was concentrated to afford the crude product, which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm 10um, mobile phase A: water (0.1%FA) , B: acetonitrile, flow rate: 30 mL / min, gradient: from 20%to 60%of B in A, wavelength: 214 / 254 nm) to give N- (9- (cyclobutylmethyl) -9-azabicyclo [3.3.1] nonan-3-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide formate (43.2 mg, 45%) as a white solid. MS (ESI) : mass calcd. for C25H33N3O, 391.26, m / z found 392.2 [M+H] +. 1H NMR (400 MHz, DMSO-d6) δ8.14 (s, 0.5H) , 7.93- 7.91 (m, 1H) , 7.37- 7.35 (m, 1H) , 7.17- 7.05 (m, 2H) , 6.89 (d, J = 8.0 Hz, 1H) , 4.46- 4.41 (m, 1H) , 4.11 (t, J = 7.2 Hz, 2H) , 3.23 (t, J =8.0 Hz, 2H) , 2.93 (s, 2H) , 2.62- 2.54 (m, 3H) , 2.32- 2.25 (m, 2H) , 2.20- 2.08 (m, 1H) , 2.02 1.97 (m, 3H) , 1.94- 1.69 (m, 7H) , 1.63- 1.57 (m, 2H) , 1.48- 1.45 (m, 1H) , 1.19- 1.16 (m, 2H) .
[0966] Example 82. Synthesis of I-98:
[0967] Experimental procedure:
[0968] Step 1
[0969] Synthesis of N- (9- (oxetan-3-ylmethyl) -9-azabicyclo [3.3.1] nonan-3-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide. To a mixture of N- {9-azabicyclo [3.3.1] nonan-3-yl} -1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxamide (80 mg, 0.25 mmol) and oxetane-3-carbaldehyde (42.6 mg, 0.50 mmol) in MeOH (10 mL) was added HOAc (0.1 mL) . The reaction mixture was stirred at room temperature for 4 h. NaBH3CN (46.6 mg, 0.74 mmol) was added and then the reaction mixture was stirred at room temperature for 12 h. The mixture was concentrated to afford the crude product which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm*10um, mobile phase A: water (0.1%NH3) , B: acetonitrile, flow rate: 30 mL / min, gradient: from 45%to 75%of B in A, wavelength: 214 / 254 nm) to give N- (9- (oxetan-3-ylmethyl) -9-azabicyclo [3.3.1] nonan-3-yl) -2,3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide (43.5 mg, 45%) as a white solid. MS (ESI) : mass calcd. for C24H31N3O2, 393.24, m / z found 394.2 [M+H] +. 1H NMR (400 MHz, DMSO-d6) δ7.92- 7.90 (m, 1H) , 7.36- 7.33 (m, 1H) , 7.17- 7.04 (m, 2H) , 6.75 (d, J = 8.8 Hz, 1H) , 4.65- 4.61 (m, 2H) , 4.31- 4.18 (m, 3H) , 4.10 (t, J = 7.2 Hz, 2H) , 3.22 (t, J = 7.6 Hz, 2H) , 3.10- 2.95 (m, 3H) , 2.92- 2.90 (m, 2H) , 2.62- 2.53 (m, 2H) , 2.24- 2.03 (m, 3H) , 1.84- 1.77 (m, 2H) , 1.53- 1.37 (m, 3H) , 0.99- 0.96 (m, 2H) .
[0970] Example 83. Synthesis of I-99 &I-100:
[0971] Experimental procedure:
[0972] Step 1
[0973] Synthesis of tert-butyl 7- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamido) -3-oxa-9-azabicyclo [3.3.1] nonane-9-carboxylate. To a mixture of 1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxylic acid (400 mg, 1.99 mmol) , tert-butyl 7-amino-3-oxa-9-azabicyclo [3.3.1] nonane-9-carboxylate (481.7 mg, 1.99 mmol) and DIEA (770.8 mg, 5.96 mmol) in DMF (20 mL) was added HATU (907.0 mg, 2.39 mmol) . The reaction mixture was stirred at room temperature for 6 h. The mixture was diluted with water (200 mL) and extracted with EA (100 mL×3) . The combined organic layer was concentrated to afford the crude product which was purified by column chromatography (PE: EA = 1: 1) to give tert-butyl 7- (2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamido) -3-oxa-9-azabicyclo [3.3.1] nonane-9-carboxylate (500 mg, 47%) as a yellow solid. MS (ESI) : mass calcd. for C24H31N3O4, 425.23, m / z found 426.2 [M+H] +.
[0974] Step 2
[0975] Synthesis of N- (3-oxa-9-azabicyclo [3.3.1] nonan-7-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide. A mixture of tert-butyl 7- {1H, 2H, 3H-benzo [b] pyrrolizine-9-amido} -3-oxa-9-azabicyclo [3.3.1] nonane-9-carboxylate (50 mg, 0.12 mmol) in DCM / TFA=3 / 1 (8 mL) was stirred at room temperature for 2 h. The mixture was concentrated to afford the crude product, which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm*10um, Mobile phase A: water (0.1%NH3) , B: acetonitrile, flow rate : 30 mL / min, gradient: from 33%to 43%of B in A, wavelength: 214 / 254 nm) to give N- (3-oxa-9-azabicyclo [3.3.1] nonan-7-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide (10.6 mg, 28%) as a white solid. MS (ESI) : mass calcd. for C19H23N3O2, 325.18, m / z found 326.1 [M+H] +. 1H NMR (400 MHz, DMSO-d6) δ8.17 (d, J = 10.4 Hz, 1H) , 8.01 -7.99 (m, 1H) , 7.36 -7.34 (m, 1H) , 7.15 -7.04 (m, 2H) , 4.59 -4.53 (m, 1H) , 4.10 (t, J = 7.2 Hz, 2H) , 3.90 -3.69 (m, 4H) , 3.19 (t, J = 7.6 Hz, 2H) , 2.84 -2.83 (m, 2H) , 2.63 -2.55 (m, 2H) , 2.26 -2.14 (m, 2H) , 1.60 (d, J = 14.4 Hz, 2H) .
[0976] Step 3
[0977] Synthesis of N- (9-methyl-3-oxa-9-azabicyclo [3.3.1] nonan-7-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide formate. To a mixture of N- {3-oxa-9-azabicyclo [3.3.1] nonan-7-yl} -1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxamide (80 mg, 0.25 mmol) and CH2O in H2O (30%, 73.8 mg, 0.74 mmol) in MeOH (10 mL) was added HOAc (0.1 mL) . The reaction mixture was stirred at room temperature for 4 h. NaBH3CN (46.3 mg, 0.74 mmol) was then added and the reaction mixture was stirred at room temperature for 12 h. The mixture was concentrated to afford the crude product which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm*10um, Mobile phase A: water (0.1%FA) , B: acetonitrile, flow rate : 30 ml / min, gradient: from 10%to 40%of B in A, wavelength: 214 / 254 nm) to give N- (9-methyl-3-oxa-9-azabicyclo [3.3.1] nonan-7-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide formate (49 mg, 59%) as a white solid. MS (ESI) : mass calcd. for C20H25N3O2, 339.19, m / z found 340.2 [M+H] +. 1H NMR (400 MHz, DMSO-d6) δ8.14 (s, 0.4H) , 8.06 (d, J = 10.4 Hz, 1H) , 8.01 -7.99 (m, 1H) , 7.37 -7.34 (m, 1H) , 7.16 -7.05 (m, 2H) , 4.56 (dd, J = 17.2, 7.2 Hz, 1H) , 4.11 (t, J = 7.2 Hz, 2H) , 3.94 -3.80 (m, 4H) , 3.20 (t, J = 7.6 Hz, 2H) , 2.78 (s, 2H) , 2.63 -2.56 (m, 2H) , 2.54 (s, 3H) , 2.46 -2.41 (m, 2H) , 1.45 (d, J = 15.2 Hz, 2H) .
[0978] Example 84. Synthesis of I-101:
[0979] Experimental procedure:
[0980] Step 1
[0981] Synthesis of N- (9-ethyl-3-oxa-9-azabicyclo [3.3.1] nonan-7-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide. To a mixture of N- {3-oxa-9-azabicyclo [3.3.1] nonan-7-yl} -1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxamide (80 mg, 0.25 mmol) and acetaldehyde (5.0M solution in THF, 0.1 mL) in MeOH (10 mL) was added HOAc (0.1 mL) . The reaction mixture was stirred at room temperature for 4 h. NaBH3CN (46.3 mg, 0.74 mmol) was then added and the reaction mixture was stirred at room temperature for 12 h. The mixture was concentrated to afford the crude product which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm*10um, mobile phase A: water (0.1%NH3) , B: acetonitrile, flow rate: 30 mL / min, gradient: from 38%to 48%of B in A, wavelength: 214 / 254 nm) to give N- (9-ethyl-3-oxa-9-azabicyclo [3.3.1] nonan-7-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide (33.5 mg, 38%) as a white solid. MS (ESI) : mass calcd. for C21H27N3O2, 353.21, m / z found 354.2 [M+H] +. 1H NMR (400 MHz, DMSO-d6) δ8.16 (d, J = 10.4 Hz, 1H) , 8.02-8.00 (m, 1H) , 7.36- 7.34 (m, 1H) , 7.16- 7.04 (m, 2H) , 4.55 (dd, J = 17.2, 7.2 Hz, 1H) , 4.10 (t, J = 7.2 Hz, 2H) , 3.85- 3.76 (m, 4H) , 3.20 (t, J = 7.6 Hz, 2H) , 2.73 (s, 2H) , 2.70- 2.64 (m, 2H) , 2.63 -2.56 (m, 2H) , 2.39- 2.30 (m, 2H) , 1.33 (d, J = 14.8 Hz, 2H) , 0.99 (t, J = 7.2 Hz, 3H) .
[0982] Example 85. Synthesis of I-102:
[0983] Experimental procedure:
[0984] Step 1
[0985] Synthesis of N- (9-propyl-3-oxa-9-azabicyclo [3.3.1] nonan-7-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide formate. To a mixture of N- {3-oxa-9-azabicyclo [3.3.1] nonan-7-yl} -1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxamide (80 mg, 0.25 mmol) and propionaldehyde (0.1 mL) in MeOH (10 mL) was added HOAc (0.1 mL) . The reaction mixture was stirred at room temperature for 4 h. NaBH3CN (46.3 mg, 0.74 mmol) was added. The reaction mixture was stirred at room temperature for 12 h. The mixture was concentrated to afford the crude product which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm*10um, Mobile phase A: water (0.1%FA) , B: acetonitrile, flow rate : 30 mL / min, gradient: From 17%to 47%of B in A, wavelength: 214 / 254 nm) to give N- (9-propyl-3-oxa-9-azabicyclo [3.3.1] nonan-7-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide formate (42 mg, 47%) as a white solid. MS (ESI) : mass calcd. for C22H29N3O2, 367.20, m / z found 368.2 [M+H] +. 1H NMR (400 MHz, DMSO-d6) δ8.13 (s, 0.25H) , 8.01 -7.99 (m, 2H) , 7.37 -7.35 (m, 1H) , 7.18 -7.06 (m, 2H) , 4.59 -4.57 (m, 1H) , 4.11 (t, J = 7.2 Hz, 2H) , 3.92 (s, 4H) , 3.20 (t, J = 7.6 Hz, 2H) , 3.01 -2.52 (m, 7H) , 2.47 -2.35 (m, 1H) , 1.49 (s, 4H) , 0.91 (t, J = 7.2 Hz, 3H) .
[0986] Example 86. Synthesis of I-103:
[0987] Experimental procedure:
[0988] Step 1
[0989] Synthesis of N- (9-cyclopropyl-3-oxa-9-azabicyclo [3.3.1] nonan-7-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide. To a mixture of N- {3-oxa-9-azabicyclo [3.3.1] nonan-7-yl} -1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxamide (70 mg, 0.21 mmol) , (1-ethoxycyclopropoxy) trimethylsilane (374.9 mg, 2.15 mmol) , HOAc (0.1 mL) and NaBH3CN (67.6 mg, 1.08 mmol) in THF (10 mL) was stirred at 60 ℃ for 16 h. The mixture was concentrated to afford the crude product which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm*10um, Mobile phase A: water (0.1%NH3) , B: acetonitrile, flow rate : 30 ml / min, Gradient: fFrom 52%to 62%of B in A, wavelength: 214 / 254 nm) to give N- (9-cyclopropyl-3-oxa-9-azabicyclo [3.3.1] nonan-7-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a]indole-9-carboxamide (7.2 mg, 9%) as a white solid. MS (ESI) : mass calcd. for C22H27N3O2, 365.21, m / z found 366.2 [M+H] +. 1H NMR (400 MHz, MeOD) δ8.65 (d, J =10.4 Hz, 1H) , 8.00- 7.98 (m, 1H) , 7.32- 7.30 (m, 1H) , 7.19- 7.07 (m, 2H) , 4.73- 4.67 (m, 1H) , 4.13 (t, J = 7.2 Hz, 2H) , 3.95- 3.83 (m, 4H) , 3.29- 3.26 (m, 2H) , 2.88- 2.86 (m, 2H) , 2.71- 2.66 (m, 2H) , 2.64- 2.56 (m, 2H) , 2.55- 2.50 (m, 1H) , 1.57 (d, J = 15.2 Hz, 2H) , 0.58 -0.49 (m, 2H) , 0.42- 0.34 (m, 2H) .
[0990] Example 87. Synthesis of I-104:
[0991] Experimental procedure:
[0992] Step 1
[0993] Synthesis of N- (9- (2-fluoroethyl) -3-oxa-9-azabicyclo [3.3.1] nonan-7-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide. To a mixture of N- {3-oxa-9-azabicyclo [3.3.1] nonan-7-yl} -1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxamide (70 mg, 0.22 mmol) and 1-fluoro-2-iodoethane (74.8 mg, 0.43 mmol) in ACN (10 mL) was added DIEA (83.4 mg, 0.65 mmol) . The reaction mixture was stirred at 80 ℃ for 16 h. The mixture was concentrated to afford the crude product which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm*10um, Mobile phase A: water (0.1%FA) , B: acetonitrile, flow rate: 30 ml / min, gradient: from 10%to 40%of B in A, wavelength: 214 / 254 nm) to give N- (9- (2-fluoroethyl) -3-oxa-9-azabicyclo [3.3.1] nonan-7-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide (16.2 mg, 20%) as a white solid. MS (ESI) : mass calcd. for C21H26FN3O2, 371.20, m / z found 372.1 [M+H] +. 1H NMR (400 MHz, DMSO-d6) δ8.16 -8.13 (m, 1H) , 8.02- 7.99 (m, 1H) , 7.36- 7.34 (m, 1H) , 7.16- 7.06 (m, 2H) , 4.59- 4.55 (m, 2H) , 4.44- 4.42 (m, 1H) , 4.10 (t, J = 7.2 Hz, 2H) , 3.88- 3.78 (m, 4H) , 3.20 (t, J = 7.6 Hz, 2H) , 2.99- 2.92 (m, 2H) , 2.76 (s, 2H) , 2.64- 2.55 (m, 2H) , 2.45- 2.28 (m, 2H) , 1.37 (d, J =14.8 Hz, 2H) .
[0994] Example 88. Synthesis of I-105:
[0995] Experimental procedure:
[0996] Step 1
[0997] Synthesis of N- (9- ( (1-fluorocyclopropyl) methyl) -3-oxa-9-azabicyclo [3.3.1] nonan-7-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide. To a mixture of N- {3-oxa-9-azabicyclo [3.3.1] nonan-7-yl} -1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxamide (80 mg, 0.25 mmol) and 1-fluorocyclopropane-1-carbaldehyde (43.3 mg, 0.49 mmol) in MeOH (10 mL) was added HOAc (0.1 mL) . The reaction mixture was stirred at room temperature for 4 h. NaBH3CN (46.3 mg, 0.74 mmol) was added. The reaction mixture was stirred at 60 ℃ for 12 h. The mixture was concentrated to afford the crude product which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) , B: acetonitrile, flow rate: 30 mL / min, gradient: from 20%to 30%of B in A, wavelength: 214 / 254 nm) to give N- (9- ( (1-fluorocyclopropyl) methyl) -3-oxa-9-azabicyclo [3.3.1] nonan-7-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide (18.4 mg, 19%) as a white solid. MS (ESI) : mass calcd. for C23H28FN3O2, 397.22, m / z found 398.2 [M+H] +. 1H NMR (400 MHz, DMSO-d6) δ8.01- 7.99 (m, 1H) , 7.82- 7.80 (m, 1H) , 7.38- 7.36 (m, 1H) , 7.18- 7.06 (m, 2H) , 4.64- 4.62 (m, 1H) , 4.47- 4.14 (m, 4H) , 4.12 (t, J = 7.2 Hz, 2H) , 4.06- 3.89 (m, 2H) , 3.69 (s, 2H) , 3.21 (t, J = 7.6 Hz, 2H) , 2.79- 2.67 (m, 2H) , 2.64- 2.58 (m, 2H) , 2.08- 1.81 (m, 2H) , 1.29- 1.24 (m, 2H) , 1.03- 1.00 (m, 2H) .
[0998] Example 89. Synthesis of I-106:
[0999] Experimental procedure:
[1000] Step 1
[1001] Synthesis of N- (9- (cyclobutylmethyl) -3-oxa-9-azabicyclo [3.3.1] nonan-7-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide. To a mixture of N- {3-oxa-9-azabicyclo [3.3.1] nonan-7-yl} -1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxamide (80 mg, 0.25 mmol) and Cyclobutanecarboxaldehyde (62.0 mg, 0.74 mmol) in MeOH (10 mL) was added HOAc (0.1 mL) . The reaction mixture was stirred at room temperature for 4 h. NaBH3CN (46.3 mg, 0.74 mmol) was added. The reaction mixture was stirred at room temperature for 12 h. The mixture was concentrated to afford the crude product, which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) , B: acetonitrile, flow rate: 30 mL / min, gradient: from 20%to 50%of B in A, wavelength: 214 / 254 nm) to give N- (9- (cyclobutylmethyl) -3-oxa-9-azabicyclo [3.3.1] nonan-7-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide (17.7 mg, 18%) as a white solid. MS (ESI) : mass calcd. for C24H31N3O2, 393.24, m / z found 394.2 [M+H] +. 1H NMR (400 MHz, DMSO-d6) δ8.18 -8.08 (m, 1H) , 8.05 -7.95 (m, 1H) , 7.40 -7.30 (m, 1H) , 7.17 -6.99 (m, 2H) , 4.55 (dd, J = 16.8, 7.2 Hz, 1H) , 4.12 (t, J = 7.2 Hz, 2H) , 3.90 -3.75 (m, 4H) , 3.19 (t, J = 7.2 Hz, 2H) , 2.68 -2.67 (m, 2H) , 2.62 -2.56 (m, 2H) , 2.41 -2.33 (m, 2H) , 2.00 -1.96 (m, 3H) , 1.90 -1.77 (m, 4H) , 1.72 -1.65 (m, 2H) , 1.35 (d, J = 14.8 Hz, 2H) .
[1002] Example 90. Synthesis of I-107:
[1003] Experimental procedure:
[1004] Step 1
[1005] Synthesis of N- (9- (oxetan-3-ylmethyl) -3-oxa-9-azabicyclo [3.3.1] nonan-7-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide. To a mixture of N- {3-oxa-9-azabicyclo [3.3.1] nonan-7-yl} -1H, 2H, 3H-benzo [b] pyrrolizine-9-carboxamide (80 mg, 0.25 mmol) and oxetane-3-carbaldehyde (63.5 mg, 0.74 mmol) in MeOH (10 mL) was added HOAc (0.1 mL) . The reaction mixture was stirred at room temperature for 4 h. NaBH3CN (46.3 mg, 0.74 mmol) was added. The reaction mixture was stirred at room temperature for 12 h. The mixture was concentrated to afford the crude product, which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm 10um, Mobile phase A: water (0.1%NH3) , B: acetonitrile, flow rate: 30 mL / min, gradient: from 30%to 60%of B in A, wavelength: 214 / 254 nm) to give N- (9- (oxetan-3-ylmethyl) -3-oxa-9-azabicyclo [3.3.1] nonan-7-yl) -2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide (10.1 mg, 10%) as a white solid. MS (ESI) : mass calcd. for C23H29N3O3, 395.22, m / z found 396.2 [M+H] +. 1H NMR (400 MHz, DMSO-d6) δ8.13 (d, J = 10.4 Hz, 1H) , 8.01- 7.99 (m, 1H) , 7.36- 7.34 (m, 1H) , 7.16- 7.03 (m, 2H) , 4.63- 4.60 (m, 2H) , 4.55 (dd, J = 17.2, 7.2 Hz, 1H) , 4.28 (t, J = 6.0 Hz, 2H) , 4.10 (t, J =7.2 Hz, 2H) , 3.83- 3.75 (m, 4H) , 3.19 (t, J = 7.6 Hz, 2H) , 3.13- 3.02 (m, 1H) , 2.95- 2.94 (m, 2H) , 2.67- 2.54 (m, 4H) , 2.40- 2.30 (m, 2H) , 1.35 (d, J = 14.8 Hz, 2H) .
[1006] Example 91. Synthesis of I-108:
[1007] Step 1
[1008] Synthesis of N- (9-cyclopropyl-9-azabicyclo [3.3.1] nonan-3-yl) -7-fluoro-2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide. To a mixture of N- (9-azabicyclo [3.3.1] nonan-3-yl) -7-fluoro-2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide (80 mg, 0.2 mmol) , CH3COOH (36 mg, 0.6 mmol) and (1-ethoxycyclopropyl) trimethylsilane (245 mg, 1.4 mmol) in THF (5 mL) was added NaBH3CN (88 mg, 1.4 mmol) and the mixture was stirred at 60 ℃ for 6 h. The mixture was diluted with water (50 mL) and extracted with EtOAc (50 mL × 2) . The combined organic layer was dried over Na2SO4 and concentrated under vacuum to get a residue. The residue was purified by prep-HPLC (Column: Welch C18 21.2*250mm 10um, Mobile Phase A: water (0.1%NH3) , B (acetonitrile) , flow rate: 25 ml / min, Gradient: From 60%to 90%of B in A, wavelength: 214 / 254 nm) to give N- (9-cyclopropyl-9-azabicyclo [3.3.1] nonan-3-yl) -7-fluoro-2, 3-dihydro-1H-pyrrolo [1, 2-a] indole-9-carboxamide (16.6 mg, 18%) as a white solid. MS (ESI) : mass calcd. for C23H28FN3O, 381.22, m / z found 382.2 [M+H] +. 1H NMR (400 MHz, DMSO) δ 7.63 (dd, J = 12.0 Hz, 4.0 Hz, 1H) , 7.36 (dd, J = 8.0 Hz, 4.0 Hz, 1H) , 6.98-6.93 (m, 1H) , 6.74 (d, J = 8.0 Hz, 1H) , 4.21-4.09 (m, 3H) , 3.23- 3.14 (m, 4H) , 2.58-2.50 (m, 2H) , 2.37-2.33 (m, 1H) , 2.18-2.07 (m, 3H) , 1.94-1.88 (m, 2H) , 1.49- 1.42 (m, 3H) , 1.03 (d, J = 12.0 Hz, 2H) , 0.46- 0.41 (m, 2H) , 0.26 0.22 (m, 2H) .
[1009] Example 92. Synthesis of I-109:
[1010] Experimental procedure:
[1011] Step 1
[1012] Synthesis of N- (9-methyl-9-azabicyclo [3.3.1] nonan-3-yl) -6, 7, 8, 9-tetrahydropyrido [1, 2-a] indole-10-carboxamide formate. To a mixture of 1H, 2H, 3H, 4H-pyrido [1, 2-a] indole-10-carboxylic acid (see Example 5) (75 mg, 0.35 mmol) , 9-methyl-9-azabicyclo [3.3.1] nonan-3-amine (53.7 mg, 0.35 mmol) and DIEA (135.1 mg, 1.05 mmol) in DMF (10 mL) was added HATU (159.0 mg, 0.42 mmol) . The reaction mixture was stirred at room temperature for 6 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL×3) . The combined organic layer was concentrated to afford the crude product which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm 10um, Mobile phase A:water (0.1%FA) , B: acetonitrile, flow rate : 30 ml / min, Gradient: from 23%to 53%of B in A, wavelength: 214 / 254 nm) to give N- (9-methyl-9-azabicyclo [3.3.1] nonan-3-yl) -6, 7, 8, 9-tetrahydropyrido [1, 2-a] indole-10-carboxamide formate (42 mg, 34%) as a yellow solid. MS (ESI) : mass calcd. for C22H29N3O, 351.23, m / z found 352.2 [M+H] +. 1H NMR (400 MHz, DMSO-d6) δ8.19 (s, 0.8H) , 7.83- 7.73 (m, 1H) , 7.45- 7.36 (m, 1H) , 7.17- 7.11 (m, 3H) , 4.44- 4.36 (m, 1H) , 4.07 (t, J = 6.0 Hz, 2H) , 3.18- 3.14 (m, 4H) , 2.54 (s, 3H) , 2.32- 2.24 (m, 2H) , 2.17- 1.89 (m, 5H) , 1.88- 1.77 (m, 2H) , 1.63- 1.50 (m, 2H) , 1.46-1.43 (m, 1H) , 1.09- 1.05 (m, 2H) .
[1013] Example 93. Synthesis of I-110:
[1014] Experimental procedure:
[1015] Step 1
[1016] Synthesis of N- (9-methyl-9-azabicyclo [3.3.1] nonan-3-yl) -3, 4-dihydro-1H- [1, 4] oxazino [4, 3-a] indole-10-carboxamide formate. To a mixture of 1H, 3H, 4H- [1, 4] oxazino [4, 3-a] indole-10-carboxylic acid (See Example 3) (70 mg, 0.32 mmol) , 9-methyl-9-azabicyclo [3.3.1] nonan-3-amine (49.7 mg, 0.32 mmol) and DIEA (125.0 mg, 0.97 mmol) in DMF (10 mL) was added HATU (147.1 mg, 0.39 mmol) . The reaction mixture was stirred at room temperature for 6 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL×3) . The combined organic layer was concentrated to afford the crude product, which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm*10um, Mobile Phase A: water (0.1%FA) , B: acetonitrile, flow rate: 30 mL / min, gradient: from 20%to 50%of B in A, wavelength: 214 / 254 nm) to give N- (9-methyl-9-azabicyclo [3.3.1] nonan-3-yl) -3, 4-dihydro-1H- [1, 4] oxazino [4, 3-a] indole-10-carboxamide formate (47 mg, 41%) as a white solid. MS (ESI) : mass calcd. for C21H27N3O2, 353.21, m / z found 354.2 [M+H] +. 1H NMR (400 MHz, DMSO-d6) δ 8.22 (s, 1H) , 7.87-7.84 (m, 1H) , 7.52- 7.45 (m, 1H) , 7.26- 7.14 (m, 3H) , 5.13 (s, 2H) , 4.43- 4.35 (m, 1H) , 4.13 (s, 4H) , 3.15- 3.12 (m, 2H) , 2.51 (s, 3H) , 2.27- 2.22 (m, 2H) , 2.18- 2.07 (m, 1H) , 1.98 -1.90 (m, 2H) , 1.66- 1.55 (m, 2H) , 1.46- 1.43 (m, 1H) , 1.07- 1.03 (m, 2H) .
[1017] Example 94. Synthesis of I-111 &I-112:
[1018] Step 1
[1019] Synthesis of tert-butyl 3- (8, 8-difluoro-6, 7, 8, 9-tetrahydropyrido [1, 2-a] indole-10-carboxamido) -9-azabicyclo [3.3.1] nonane-9-carboxylate. To a mixture of 2, 2-difluoro-1H, 3H, 4H-pyrido [1, 2-a] indole-10-carboxylic acid (190 mg, 0.76 mmol) , tert-butyl 3-amino-9-azabicyclo [3.3.1] nonane-9-carboxylate (181 mg, 0.76 mmol) and DIEA (293 mg, 2.27 mmol) in DMF (10 mL) was added HATU (345 mg, 0.90 mmol) . The reaction mixture was stirred at room temperature for 6 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL×3) . The combined organic layer was concentrated to afford a crude product which was purified by column chromatography (PE: EA = 1: 1) to give tert-butyl 3- (8, 8-difluoro-6, 7, 8, 9-tetrahydropyrido [1, 2-a] indole-10-carboxamido) -9-azabicyclo [3.3.1] nonane-9-carboxylate (240 mg, 54%) as a yellow solid. MS (ESI) : mass calcd. for C26H33F2N3O3, 473.25, m / z found 474.2 [M+H] +.
[1020] Step 2
[1021] Synthesis of N- (9-azabicyclo [3.3.1] nonan-3-yl) -8, 8-difluoro-6, 7, 8, 9-tetrahydropyrido [1, 2-a] indole-10-carboxamide. To a mixture of tert-butyl 3- {2, 2-difluoro-1H, 3H, 4H-pyrido [1, 2-a] indole-10-amido} -9-azabicyclo [3.3.1] nonane-9-carboxylate (240 mg, 0.51 mmol) in DCM / TFA=3 / 1 (12 mL) was stirred at room temperature for 2 h. The mixture was concentrated to afford a crude product, which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250 mm 10 um, Mobile Phase A: water (0.1%FA) , B (acetonitrile) , flow rate: 30 ml / min, Gradient: from 22%to 32%of B in A, wavelength: 214 / 254 nm) to give N- (9-azabicyclo [3.3.1] nonan-3-yl) -8, 8-difluoro-6, 7, 8, 9-tetrahydropyrido [1, 2-a] indole-10-carboxamide (110 mg, 58%) as a white solid. MS (ESI) : mass calcd. for C21H25F2N3O, 373.20, m / z found 374.2 [M+H] +. 1H NMR (400 MHz, DMSO) δ8.30 (s, 1H) , 7.83 (d, J = 7.2 Hz, 1H) , 7.50 (m, 2H) , 7.31 -7.16 (m, 2H) , 4.47 -4.36 (m, 1H) , 4.31 (t, J = 6.4 Hz, 2H) , 3.84 -3.77 (m, 4H) , 2.75 -2.60 (m, 2H) , 2.37 -2.25 (m, 2H) , 2.13 -2.01 (m, 1H) , 1.86 -1.61 (m, 4H) , 1.58 -1.52 (m, 3H) .
[1022] Step 3
[1023] Synthesis of 8, 8-difluoro-N- (9-methyl-9-azabicyclo [3.3.1] nonan-3-yl) -6, 7, 8, 9-tetrahydropyrido [1, 2-a] indole-10-carboxamide. To a solution of N- {9-azabicyclo [3.3.1] nonan-3-yl} -2, 2-difluoro-1H, 3H, 4H-pyrido [1, 2-a] indole-10-carboxamide (80 mg, 0.21 mmol) and CH2O in H2O (30%, 64 mg, 0.64 mmol) in MeOH (10 mL) was added AcOH (12.9 mg, 0.21 mmol) . The reaction mixture was stirred at room temperature for 4 h. NaBH3CN (40.4 mg, 0.64 mmol) was added. The reaction mixture was stirred at room temperature for 12 h. The mixture was concentrated to afford a crude product, which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250 mm 10 um, Mobile Phase A: water (0.1%TFA) , B (acetonitrile) , flow rate: 30 mL / min, Gradient: from 25%to 35%of B in A, wavelength: 214 / 254 nm) to give 8, 8-difluoro-N- (9-methyl-9-azabicyclo [3.3.1] nonan-3-yl) -6,7, 8, 9-tetrahydropyrido [1, 2-a] indole-10-carboxamide (22.5 mg, 27%) as a white solid. MS (ESI) : mass calcd. for C22H27F2N3O, 387.21, m / z found 388.2 [M+H] +. 1H NMR (400 MHz, DMSO) δ8.98 (s, 1H) , 7.84- 7.81 (m, 1H) , 7.54- 7.51 (m, 2H) , 7.27- 7.20 (m, 2H) , 4.66-4.57 (m, 1H) , 4.32 (t, J = 6.4 Hz, 2H) , 3.81 (t, J = 14.8 Hz, 2H) , 3.67- 3.65 (m, 2H) , 2.91-2.83 (m, 3H) , 2.71- 2.62 (m, 2H) , 2.44- 2.38 (m, 2H) , 2.20- 2.00 (m, 3H) , 1.89- 1.78 (m, 2H) , 1.54- 1.42 (m, 3H) .
[1024] Example 95. Synthesis of I-113 &I-114:
[1025] Experimental procedure:
[1026] Step 1
[1027] Synthesis of 2- (4, 4-difluoropiperidin-1-yl) -5-fluorobenzaldehyde. To a solution of 2, 5-difluorobenzaldehyde (40 g, 0.2815 mol) and 4, 4-difluoropiperidine hydrochloride (53.23 g, 0.34 mol) in DMSO (400 mL) was added K2CO3 (97.27 g, 0.71 mol) . The reaction mixture was stirred at 95℃ for 16 h. The mixture was diluted with water (1000 mL) and extracted with EA (500 mL×3) . The combined organic layer was concentrated to afford a crude product which was purified by column chromatography (PE: EA = 10: 1) to give 2- (4, 4-difluoropiperidin-1-yl) -5-fluorobenzaldehyde (4 g, 7%) as a yellow solid. MS (ESI) : mass calcd. for C12H12F3NO, 243.09, m / z found 244.1 [M+H] +.
[1028] Step 2
[1029] Synthesis of (Z) -N'- (2- (4, 4-difluoropiperidin-1-yl) -5-fluorobenzylidene) -4-methylbenzenesulfonohydrazide. To a mixture of 2- (4, 4-difluoropiperidin-1-yl) -5-fluorobenzaldehyde (4 g, 0.016 mol) in toluene (50 mL) was added 4-methylbenzenesulfonohydrazide (3.67 g, 0.020 mol) . The reaction mixture was stirred at room temperature for 0.5 h. The reaction mixture was concentrated under reduced pressure to give (Z) -N'- (2- (4, 4-difluoropiperidin-1-yl) -5-fluorobenzylidene) -4-methylbenzenesulfonohydrazide (6.77 g, crude) as a yellow solid which was used directly for the next step. MS (ESI) : mass calcd. for C19H20F3N3O2S, 411.12, m / z found 412.1 [M+H] +.
[1030] Step 3
[1031] Synthesis of 2, 8, 8-trifluoro-6, 7, 8, 9, 9a, 10-hexahydropyrido [1, 2-a] indole. To a mixture of N'- [ (1Z) - [2- (4, 4-difluoropiperidin-1-yl) -5-fluorophenyl] methylidene] -4-methylbenzenesulfonohydrazide (6.77 g, 0.017 mol) in toluene (100 mL) was added NaH (0.44 g, 0.018 mol) . The reaction mixture was stirred at 135℃ for 0.5 h. The mixture was diluted with water (500 mL) and extracted with EA (200 mL×3) . The combined organic layer was concentrated to afford a crude product which was purified by column chromatography (PE: EA = 10: 1) to give 2, 8, 8-trifluoro-6, 7, 8, 9, 9a, 10-hexahydropyrido [1, 2-a] indole (1.6 g, 37%) as a yellow solid. MS (ESI) : mass calcd. for C12H12F3N, 227.09, m / z found 228.1 [M+H] +.
[1032] Step 4
[1033] Synthesis of 2, 8, 8-trifluoro-6, 7, 8, 9-tetrahydropyrido [1, 2-a] indole. To a mixture of 2,2, 8-trifluoro-1H, 3H, 4H, 10H, 10aH-pyrido [1, 2-a] indole (1.6 g, 0.007 mol) in chloroform (50 mL) was added MnO2 (3.04 g, 0.035 mol) . The reaction mixture was stirred at 80 ℃ for 24 h. The mixture was filtered through celite, and the filtrate was concentrated to afford a crude product which was purified by column chromatography (PE: EA = 3: 1) to give 2, 8, 8-trifluoro-6, 7, 8, 9-tetrahydropyrido [1, 2-a] indole (0.7 g, 44%) as a yellow solid. MS (ESI) : mass calcd. for C12H10F3N, 225.08, m / z found 226.1 [M+H] +.
[1034] Step 5
[1035] Synthesis of 2, 8, 8-trifluoro-6, 7, 8, 9-tetrahydropyrido [1, 2-a] indole-10-carbaldehyde. To a mixture of 2, 2, 8-trifluoro-1H, 3H, 4H-pyrido [1, 2-a] indole (680 mg, 3.02 mmol) in DMF (20 mL) was added POCl3 (1.39 g, 9.06 mmol) . The reaction mixture was stirred at 90 ℃ for 2 h. The reaction mixture was quenched with ice water and adjusted to pH = 8 with sat. NaHCO3. The mixture was extracted with EA (100 mL x 2) . The combined organic layer was concentrated to afford a crude product which was purified by column chromatography (PE: EA = 3: 1) to give 2, 8, 8-trifluoro-6, 7, 8, 9-tetrahydropyrido [1, 2-a] indole-10-carbaldehyde (520 mg, 63%) as a yellow solid. MS (ESI) : mass calcd. for C13H10F3NO, 253.07, m / z found 254.1 [M+H] +.
[1036] Step 6
[1037] Synthesis of 2, 8, 8-trifluoro-6, 7, 8, 9-tetrahydropyrido [1, 2-a] indole-10-carboxylic acid. To a mixture of NaClO2 (536 mg, 5.92 mmol) and NaH2PO4 (2369 mg, 19.75 mmol) in H2O (5 mL) were added to 2, 2, 8-trifluoro-1H, 3H, 4H-pyrido [1, 2-a] indole-10-carbaldehyde (500 mg, 1.97 mmol) and 2-Methyl-2-butene (1385 mg, 19.75 mmol) in t-BuOH (15 mL) . The reaction mixture was stirred at room temperature for 16 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL×3) . The combined organic layer was concentrated under reduced pressure to give 2, 8, 8-trifluoro-6, 7, 8, 9-tetrahydropyrido [1, 2-a] indole-10-carboxylic acid (370 mg, crude) as a yellow solid which was used directly for the next step. MS (ESI) : mass calcd. for C13H10F3NO2, 269.07, m / z found 270.0 [M+H] +.
[1038] Step 7
[1039] Synthesis of tert-butyl 7- (2, 8, 8-trifluoro-6, 7, 8, 9-tetrahydropyrido [1, 2-a] indole-10-carboxamido) -3-oxa-9-azabicyclo [3.3.1] nonane-9-carboxylate. To a mixture of 2, 2, 8-trifluoro-1H, 3H, 4H-pyrido [1, 2-a] indole-10-carboxylic acid (180 mg, 0.67 mmol) , tert-butyl 7-amino-3-oxa-9-azabicyclo [3.3.1] nonane-9-carboxylate (162 mg, 0.67 mmol) and DIEA (259 mg, 2.01 mmol) in DMF (10 mL) was added HATU (305 mg, 0.80 mmol) . The reaction mixture was stirred at room temperature for 6 h. The mixture was diluted with water (100 mL) and extracted with EA (50 mL×3) . The combined organic layer was concentrated to afford a crude product which was purified by column chromatography (PE: EA = 1: 1) to give tert-butyl 7- (2, 8, 8-trifluoro-6, 7, 8, 9-tetrahydropyrido [1, 2-a] indole-10-carboxamido) -3-oxa-9-azabicyclo [3.3.1] nonane-9-carboxylate (250 mg, 66%) as a yellow solid. MS (ESI) : mass calcd. for C25H30F3N3O4, 493.22, m / z found 494.2 [M+H] +.
[1040] Step 8
[1041] Synthesis of N- (3-oxa-9-azabicyclo [3.3.1] nonan-7-yl) -2, 8, 8-trifluoro-6, 7, 8, 9-tetrahydropyrido [1, 2-a] indole-10-carboxamide. To a mixture of tert-butyl 7- {2, 2, 8-trifluoro-1H, 3H, 4H-pyrido [1, 2-a] indole-10-amido} -3-oxa-9-azabicyclo [3.3.1] nonane-9-carboxylate (250 mg, 0.51 mmol) in DCM / TFA = 3 / 1 (12 mL) was stirred at room temperature for 2 h. The mixture was concentrated to afford a crude product, which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250 mm 10 um, Mobile Phase A: water (0.1%FA) , B (acetonitrile) , flow rate: 30 ml / min, Gradient: from 18%to 48%of B in A, wavelength: 214 / 254 nm) to give N- (3-oxa-9-azabicyclo [3.3.1] nonan-7-yl) -2, 8, 8-trifluoro-6, 7, 8, 9-tetrahydropyrido [1, 2-a] indole-10-carboxamide (100 mg, 49%) as a white solid. MS (ESI) : mass calcd. for C20H22F3N3O2, 393.17, m / z found 394.2 [M+H] +. 1H NMR (400 MHz, MeOD) δ8.43 (s, 1H) , 8.28 (s, 0.25 H) , 7.56- 7.53 (m, 1H) , 7.45 (dd, J = 8.8 Hz, 4.4 Hz, 1H) , 7.03 (td, J = 9.2 Hz, 2.4 Hz, 1H) , 4.77- 4.74 (m, 1H) , 4.33 (t, J = 6.4 Hz, 2H) , 4.18-4.07 (m, 4H) , 3.80 (t, J = 14.4 Hz, 2H) , 3.54- 3.52 (m, 2H) , 2.69- 2.49 (m, 4H) , 2.10 (d, J =15.6 Hz, 2H) .
[1042] Step 9
[1043] Synthesis of 2, 8, 8-trifluoro-N- (9-methyl-3-oxa-9-azabicyclo [3.3.1] nonan-7-yl) -6, 7, 8, 9-tetrahydropyrido [1, 2-a] indole-10-carboxamide. To a solution of 2, 2, 8-trifluoro-N- {3-oxa-9-azabicyclo [3.3.1] nonan-7-yl} -1H, 3H, 4H-pyrido [1, 2-a] indole-10-carboxamide (90 mg, 0.23 mmol) and CH2O in H2O (30%, 68 mg, 0.69 mmol) in MeOH (10 mL) was added AcOH (13.7 mg, 0.23 mmol) . The reaction mixture was stirred at room temperature for 4 h. NaBH3CN (43.1 mg, 0.69 mmol) was added, and the reaction mixture was stirred at room temperature for 12 h. The mixture was concentrated to afford a crude product, which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%FA) , B: acetonitrile, flow rate: 30 mL / min, Gradient: from 18%to 48%of B in A, wavelength: 214 / 254 nm) to give 2, 8, 8-trifluoro-N- (9-methyl-3-oxa-9-azabicyclo [3.3.1] nonan-7-yl) -6, 7, 8, 9-tetrahydropyrido [1, 2-a] indole-10-carboxamide (31.4 mg, 33%) as a white solid. MS (ESI) : mass calcd. for C21H24F3N3O2, 407.18, m / z found 408.2 [M+H] +. 1H NMR (400 MHz, DMSO) δ8.14 (s, 0.4H) , 8.12- 8.10 (m, 1H) , 7.62- 7.50 (m, 2H) , 7.10 (td, J = 9.2, 2.4 Hz, 1H) , 4.60- 4.54 (m, 1H) , 4.31 (t, J = 6.4 Hz, 2H) , 3.98- 3.78 (m, 6H) , 2.89 (s, 2H) , 2.72- 2.55 (m, 5H) , 2.46- 2.44 (m, 2H) , 1.58 (d, J = 13.2 Hz, 2H) .
[1044] Example 96. Synthesis of I-115 &I-116:
[1045] Experimental procedure:
[1046] Step 1
[1047] Synthesis of ethyl 2- (2- (6-chlorohexanamido) phenyl) acetate. To a mixture of ethyl 2- (2-aminophenyl) acetate (8.5 g, 0.047 mol) and DIEA (12.25 g, 0.095 mol) in THF (100 mL) was added 6-chlorohexanoyl chloride (8.01 g, 0.047 mol) . The reaction mixture was stirred at room temperature for 1 h. The mixture was diluted with water (300 mL) and extracted with EA (200 mL×3) . The combined organic layer was concentrated to afford the crude product which was purified by column chromatography (PE: EA = 10: 1) to give ethyl 2- (2- (6-chlorohexanamido) phenyl) acetate (11.5 g, 74%) as a yellow solid. MS (ESI) : mass calcd. for C16H22ClNO3, 311.13, m / z found 312.1 [M+H] +.
[1048] Step 2
[1049] Synthesis of ethyl 7, 8, 9, 10-tetrahydro-6H-azepino [1, 2-a] indole-11-carboxylate. To a mixture of ethyl 2- [2- (6-chlorohexanamido) phenyl] acetate (11.5 g, 0.037 mol) in THF (200 mL) was added t-BuOK (10.35 g, 0.092 mol) . The reaction mixture was stirred at room temperature for 4 h. The mixture was diluted with water (300 mL) and extracted with EA (200 mL×3) . The combined organic layer was concentrated to afford the crude product which was purified by column chromatography (PE: EA = 3: 1) to give ethyl 7, 8, 9, 10-tetrahydro-6H-azepino [1, 2-a] indole-11-carboxylate (0.9 g, 7%) as a yellow solid. MS (ESI) : mass calcd. for C16H19NO2, 257.14, m / z found 258.1 [M+H] +.
[1050] Step 3
[1051] Synthesis of 7, 8, 9, 10-tetrahydro-6H-azepino [1, 2-a] indole-11-carboxylic acid. To a solution of ethyl 7, 8, 9, 10-tetrahydro-6H-azepino [1, 2-a] indole-11-carboxylate (230 mg, 0.89 mmol) in EtOH (20 mL) and H2O (5 mL) was added KOH (180 mg, 3.21 mmol) . The reaction solution was stirred at 80 ℃for 16 h. The reaction solution was diluted with water (50 mL) and extracted with EtOAc (20 mL x 2) . The water phase was acidified with HCl (1N) to pH 2 ~3 and extracted with EtOAc (30 mL x 2) . The combined organic layer was concentrated under reduced pressure to afford 7, 8, 9, 10-tetrahydro-6H-azepino [1, 2-a] indole-11-carboxylic acid (140 mg, crude) as white solid.
[1052] MS (ESI) : mass calcd. for C14H15NO2, 229.11, m / z found 230.2 [M+H] +.
[1053] Step 4
[1054] Synthesis of tert-butyl 7- (7, 8, 9, 10-tetrahydro-6H-azepino [1, 2-a] indole-11-carboxamido) -3-oxa-9-azabicyclo [3.3.1] nonane-9-carboxylate. To a solution of 7, 8, 9, 10-tetrahydro-6H-azepino [1, 2-a] indole-11-carboxylic acid (120 mg, 0.52 mmol) and tert-butyl 7-amino-3-oxa-9-azabicyclo [3.3.1] nonane-9-carboxylate (120 mg, 0.49 mmol) in DMF (10 mL) were added DIEA (310 mg, 2.56 mmol) and HATU (304 mg, 0.80 mmol) , the reaction mixture was stirred at room temperature for 4 h. LCMS showed the reaction was completed. The reaction mixture was diluted with water (50 mL) and extracted with EtOAc (20 mL x 3) . The combined organic layer was washed with brine, dried over Na2SO4 and concentrated to afford a residue which was purified by silica gel chromatography eluting with 50%of EA in PE to afford tert-butyl 7- (7, 8, 9, 10-tetrahydro-6H-azepino [1, 2-a] indole-11-carboxamido) -3-oxa-9-azabicyclo [3.3.1] nonane-9-carboxylate (140 mg, 59%) as yellow solid. MS (ESI) : mass calcd. for C26H35N3O4, 453.26, m / z found 454.2 [M+H] +.
[1055] Step 5
[1056] [Corrected under Rule 26, 11.12.2024]Synthesis of N- (3-oxa-9-azabicyclo [3.3.1] nonan-7-yl) -7, 8, 9, 10-tetrahydro-6H-azepino [1, 2-a] indole-11-carboxamide formate. To a solution of tert-butyl 7- (7, 8, 9, 10-tetrahydro-6H-azepino [1, 2-a] indole-11-carboxamido) -3-oxa-9-azabicyclo [3.3.1] nonane-9-carboxylate (140 mg, 0.31 mmol) in DCM (20 mL) was added TFA (2 mL) at 0 ℃, the reaction mixture was stirred at room temperature for 1h. The mixture was concentrated to afford the crude product, which was purified by prep-HPLC (Column: WELCH Xtimate C18 21.2*250mm*10um, mobile phase A: water (0.1%FA) , B: acetonitrile, flow rate: 30 mL / min, Gradient: from 15%to 45%of B in A, wavelength: 214 / 254 nm) to give N- (3-oxa-9-azabicyclo [3.3.1] nonan-7-yl) -7, 8, 9, 10-tetrahydro-6H-azepino [1, 2-a] indole-11-carboxamide formate (80 mg, 73%) as yellow solid. MS (ESI) : mass calcd. for C21H27N3O2, 353.21, m / z found 354.2 [M+H] +. 1H NMR (400 MHz, DMSO) δ 8.79 (s, 1H) , 7.98 (d, J = 9.6 Hz, 1H) , 7.73 (d, J = 8.0 Hz, 1H) , 7.53 (d, J = 8.4 Hz, 1H) , 7.20 -7.05 (m, 2H) , 4.63-4.57 (m, 1H) , 4.34- 4.22 (m, 2H) , 4.02 -3.90 (m, 4H) , 3.53- 3.51 (m, 2H) , 3.30 -3.26 (m, 2H) , 2.46- 2.41 (m, 2H) , 1.94 -1.91 (m, 2H) , 1.84- 1.80 (m, 2H) , 1.67 -1.63 (m, 4H) .
[1057] Step 6
[1058] Synthesis of N- (9-methyl-3-oxa-9-azabicyclo [3.3.1] nonan-7-yl) -7, 8, 9, 10-tetrahydro-6H-azepino [1, 2-a] indole-11-carboxamide. To a mixture of N- (3-oxa-9-azabicyclo [3.3.1] nonan-7-yl) -7, 8, 9, 10-tetrahydro-6H-azepino [1, 2-a] indole-11-carboxamide (50 mg, 0.14 mmol) and HCHO (0.5 mL) in MeOH (10 mL) was added HOAc (0.1 mL) . The reaction mixture was stirred at room temperature for 1 h. NaBH3CN (30 mg, 0.44 mmol) was added. The reaction mixture was stirred at room temperature for 6 h. LCMS showed the reaction was completed. The reaction mixture was diluted with water (20 mL) and extracted with EtOAc (30 mL x 2) . The combined organic layer was washed with brine, dried over Na2SO4, and concentrated to dryness in vacuo directly. The product was purified by prep-HPLC (Column: WELCH Xtimate C18 21.2*250mm*10um, mobile phase A: water (0.1%FA) , B: acetonitrile, flow rate: 30 mL / min, Gradient: from 15%to 45%of B in A, wavelength: 214 / 254 nm) to afford N- (9-methyl-3-oxa-9-azabicyclo [3.3.1] nonan-7-yl) -7, 8, 9, 10-tetrahydro-6H-azepino [1, 2-a] indole-11-carboxamide (26.2 mg, 47%) as a white solid. MS (ESI) : mass calcd. for C22H29N3O2, 367.23, m / z found 368.2 [M+H] +. 1H NMR (400 MHz, DMSO-d6) δ8.14 (s, 1H) , 7.733 (d, J = 8.0 Hz, 1H) , 7.52 (d, J = 8.0 Hz, 1H) , 7.18- 7.04 (m, 2H) , 4.57 (q, J = 8.0 Hz, 1H) , 4.33- 4.21 (m, 2H) , 3.96- 3.86 (m, 2H) , 3.83- 3.74 (m, 2H) , 3.32- 3.26 (m, 2H) , 2.83 (s, 2H) , 2.57 (s, 3H) , 2.49- 2.42 (m, 2H) , 1.87- 1.78 (m, 2H) , 1.73 1.59 (m, 4H) , 1.52 (d, J = 16.0 Hz, 2H) .
[1059] Example 97. Synthesis of I-117 &I-118:
[1060] Experimental procedure:
[1061] Step 1
[1062] Synthesis of 1, 2, 4, 5-tetrahydro- [1, 4] oxazepino [4, 5-a] indole. To a mixture of bis(1H-indole) (25 g, 0.21 mol) , Bis (acetonitrile) dichloropalladium (II) (5.54 g, 0.021 mol) , Norbornene (100.46 g, 1.07 mol) and Cs2CO3 (139.06 g, 0.43 mol) in DMF (300 mL) and H2O (3 mL) was added 1-bromo-2- (2-bromoethoxy) ethane (123.73 g, 0.53 mol) . The reaction mixture was stirred at 80℃ for 12 h under air. The mixture was diluted with water (1000 mL) and extracted with EA (500 mL×3) . The combined organic layer was concentrated to afford the crude product which was purified by column chromatography (PE: EA = 10: 1) to give 1, 2, 4, 5-tetrahydro- [1, 4] oxazepino [4, 5-a] indole (2.7 g, 5%) as a yellow solid. MS (ESI) : mass calcd. for C12H13NO, 187.10, m / z found 188.1 [M+H] +.
[1063] Step 2
[1064] Synthesis of 2, 2, 2-trifluoro-1- (1, 2, 4, 5-tetrahydro- [1, 4] oxazepino [4, 5-a] indol-11-yl)ethan-1-one. To a solution of 1, 2, 4, 5-tetrahydro- [1, 4] oxazepino [4, 5-a] indole (670 mg, 3.58 mmol) and TEA (435 mg, 4.3 mmol) in DCE (20 mL) was added TFAA (833 mg, 3.97 mmol) dropwise at 0℃. The reaction mixture was stirred for 2h at 0℃. LCMS showed the reaction was completed. The solution was diluted with water (30 mL) and extracted with DCM (20 mL × 2) . The combined organic layer was washed with brine, dried over Na2SO4 and concentrated to afford 2, 2, 2-trifluoro-1- (1, 2, 4, 5-tetrahydro- [1, 4] oxazepino [4, 5-a] indol-11-yl) ethan-1-one (550 mg, crude) as yellow solid. MS (ESI) : mass calcd. for C14H12F3NO2, 283.08, m / z found 284.1 [M+H] +.
[1065] Step 3
[1066] Synthesis of 1, 2, 4, 5-tetrahydro- [1, 4] oxazepino [4, 5-a] indole-11-carboxylic acid. To a solution of 2, 2, 2-trifluoro-1- (1, 2, 4, 5-tetrahydro- [1, 4] oxazepino [4, 5-a] indol-11-yl) ethan-1-one (540 mg, 1.91 mmol) in DMF (10 mL) was added NaH (483 mg, 12.08 mmol) at 0℃. H2O (1 mL) was added to the solution at 0℃The reaction mixture was stirred at room temperature for 2h. LCMS showed the reaction was completed. The reaction solution was diluted with water (50 mL) and extracted with EtOAc (20 mL x 2) . The water phase was acidified with HCl (1N) to pH 2 ~3 and extracted with EtOAc (30 mL x 2) . The combined organic layer was concentrated under reduced pressure to afford
[1067] 1, 2, 4, 5-tetrahydro- [1, 4] oxazepino [4, 5-a] indole-11-carboxylic acid (400 mg, crude) as yellow solid.
[1068] MS (ESI) : mass calcd. for C13H13NO3, 231.09, m / z found 232.1 [M+H] +.
[1069] Step 4
[1070] Synthesis of tert-butyl 7- (1, 2, 4, 5-tetrahydro- [1, 4] oxazepino [4, 5-a] indole-11-carboxamido) -3-oxa-9-azabicyclo [3.3.1] nonane-9-carboxylate. To a solution of 1, 2, 4, 5-tetrahydro- [1, 4] oxazepino [4, 5-a] indole-11-carboxylic acid (150 mg, 4.84 mmol) and tert-butyl 7-amino-3-oxa-9-azabicyclo [3.3.1] nonane-9-carboxylate (157 mg, 0.65 mmol) in DMF (20 mL) were added DIEA (418 mg, 3.24 mmol) and HATU (375 mg, 0.99 mmol) , the reaction mixture was stirred at room temperature for 4 h. LCMS showed the reaction was completed. The reaction mixture was diluted with water (50 mL) and extracted with EtOAc (20 mL x 3) . The combined organic layer was washed with brine, dried over Na2SO4 and concentrated to afford a residue which was purified by silica gel chromatography eluting with 50%of EA in PE to afford tert-butyl 7- (1, 2, 4, 5-tetrahydro- [1, 4] oxazepino [4, 5-a] indole-11-carboxamido) -3-oxa-9-azabicyclo [3.3.1] nonane-9-carboxylate (250 mg, 85%) as yellow solid. MS (ESI) : mass calcd. for C25H33N3O5, 455.24, m / z found 456.2 [M+H] +.
[1071] Step 5
[1072] Synthesis of N- (3-oxa-9-azabicyclo [3.3.1] nonan-7-yl) -1, 2, 4, 5-tetrahydro- [1, 4] oxazepino [4, 5-a] indole-11-carboxamide. To a solution of tert-butyl 7- (1, 2, 4, 5-tetrahydro-[1,4] oxazepino [4, 5-a] indole-11-carboxamido) -3-oxa-9-azabicyclo [3.3.1] nonane-9-carboxylate (150 mg, 0.33 mmol) in DCM (20 mL) was added TFA (2 mL) at 0℃, the reaction mixture was stirred at room temperature for 1h. The mixture was concentrated to afford the crude product, which was purified by prep-HPLC (WELCH Xtimate C18 21.2*250mm 10um, Mobile Phase A: water (0.1%NH3) B (acetonitrile) , flow rate : 30 ml / min, Gradient: From 25%to 45%of B in A, wavelength: 214 / 254 nm) to give N- (3-oxa-9-azabicyclo [3.3.1] nonan-7-yl) -1, 2, 4, 5-tetrahydro- [1, 4] oxazepino [4, 5-a] indole-11-carboxamide (100 mg, 85%) as yellow solid. MS (ESI) : mass calcd. for C20H25N3O3, 355.19, m / z found 356.2 [M+H] +. 1H NMR (400 MHz, DMSO-d6) δ 8.32 (d, J = 10.0 Hz, 1H) , 7.73 (d, J = 7.6 Hz, 1H) , 7.51 (d, J = 8.0 Hz, 1H) , 7.23- 7.04 (m, 2H) , 4.58- 4.52 (m, 1H) , 4.48 4.37 (m, 2H) , 3.90- 3.63 (m, 8H) , 3.61- 3.51 (m, 2H) , 2.85- 2.83 (m, 2H) , 2.28- 2.16 (m, 2H) , 1.64 (d, J = 14.4 Hz, 2H) .
[1073] Step 6
[1074] Synthesis of N- (9-methyl-3-oxa-9-azabicyclo [3.3.1] nonan-7-yl) -1, 2, 4, 5-tetrahydro- [1, 4] oxazepino [4, 5-a] indole-11-carboxamide. To a solution of N- (3-oxa-9-azabicyclo [3.3.1] nonan-7-yl) -1, 2, 4, 5-tetrahydro- [1, 4] oxazepino [4, 5-a] indole-11-carboxamide (100 mg, 0.28 mmol) and HCHO (0.1 mL) in MeOH (20 mL) was added HOAc (0.1 mL) . The reaction solution was stirred at room temperature for 1 h. NaBH3CN (63 mg, 0.93 mmol) was added. The reaction mixture was stirred at room temperature for 6 h. LCMS showed the reaction was completed. The reaction mixture was diluted with water (50 mL) and extracted with EtOAc (30 mL x 3) . The combined organic layer was washed with brine, dried over Na2SO4, and concentrated to dryness in vacuo directly. The product was purified by prep-HPLC (Column: WELCH Xtimate C18 21.2*250mm*10um, mobile phase A: water (0.1%FA) , B: acetonitrile, flow rate: 30 mL / min, Gradient: from 30%to 50%of B in A, wavelength: 214 / 254 nm) to afford N- (9-methyl-3-oxa-9-azabicyclo [3.3.1] nonan-7-yl) -1,2, 4, 5-tetrahydro- [1, 4] oxazepino [4, 5-a] indole-11-carboxamide (22.3 mg, 22%) as a white solid. MS (ESI) : mass calcd. for C21H27N3O3, 369.21, m / z found 370.1 [M+H] +. 1H NMR (400 MHz, DMSO-d6) δ 8.30 (d, J = 8.0 Hz, 1H) , 7.74 (d, J = 8.0 Hz, 1H) , 7.51 (d, J = 8.0 Hz, 1H) , 7.20- 7.08 (m, 2H) , 4.61- 4.51 (m, 1H) , 4.48- 4.34 (m, 2H) , 3.89- 3.74 (m, 6H) , 3.70 (d, J = 12.0 Hz, 2H) , 3.60- 3.51 (m, 2H) , 2.64- 2.58 (m, 2H) , 2.46- 2.34 (m, 5H) , 1.39 (d, J = 16.0 Hz, 2H) .
[1075] Example 98. Synthesis of I-119 &I-120:
[1076] Experimental procedure:
[1077] Step 1
[1078] Synthesis of tert-butyl2- (5-fluoro-2-nitrophenyl) acetate. To a mixture of 2- (5-fluoro-2-nitrophenyl) acetic acid (49 g, 246.1 mmol) , DIEA (15.9 g, 123.1 mmol) and (Boc) 2O (53.7 g, 246.1 mmol) in tert-Butanol (600 mL) was added 4-DMAP (3 g, 24.61 mmol) . The mixture was stirred at room temperature for 12 h. The mixture was quenched with water (500 mL) , extracted with EtOAc (500 mL × 3) . The combined organic layer was concentrated to afford a residue which was purified by silica gel chromatography eluted with EtOAc / petroleum = 0 -5%to give tert-butyl 2- (5-fluoro-2-nitrophenyl) acetate (56.5 g, 89%) as a white solid. MS (ESI) : mass calcd. for C12H14FNO4, 255.09, m / z found 278.0 [M +Na] .
[1079] Step 2
[1080] Synthesis of tert-butyl2- (2-amino-5-fluorophenyl) acetate. To a mixture of tert-butyl 2- (5-fluoro-2-nitrophenyl) acetate (50 g, 195.9 mmol) in EtOAc (500 mL) was added Pd / C (1 g, 195.9 mmol) . The mixture was stirred at room temperature for 48 h under H2. The mixture was filtered then filtrate was removed by evaporation under reduced pressure to afford tert-butyl 2- (2-amino-5-fluorophenyl) acetate (40 g, 86%) as white solid. MS (ESI) : mass calcd. for C12H16FNO2, 225.12, m / z found 170.1 [M-tert-butyl+ H] +.
[1081] Step 3
[1082] Synthesis of tert-butyl 2- (2- (6-chlorohexanamido) -5-fluorophenyl) acetate. To a solution of tert-butyl 2- (2-amino-5-fluorophenyl) acetate (12.4 g, 0.06 mol) and DIEA (21 g, 0.16 mol) in THF (200 mL) was added 6-chlorohexanoyl chloride (11.2 g, 0.07 mol) dropwise at 0℃. The reaction mixture was stirred at room temperature for 2h. LCMS showed the reaction was completed. The solution was diluted with water (300 mL) and extracted with EtOAc (200 mL × 3) . The combined organic layer was washed with brine, dried over Na2SO4 and concentrated to afford a residue which was purified by silica gel chromatography eluting with 10%of EtOAc in PE to afford tert-butyl 2- (2- (6-chlorohexanamido) -5-fluorophenyl) acetate (14.3 g, 72.6%) as yellow oil. MS (ESI) : mass calcd. for C18H25ClFNO3, 357.15, m / z found 302.1 [M-55] +.
[1083] Step 4
[1084] Synthesis of tert-butyl 2-fluoro-7, 8, 9, 10-tetrahydro-6H-azepino [1, 2-a] indole-11-carboxylate. To a solution of tert-butyl 2- (2- (6-chlorohexanamido) -5-fluorophenyl) acetate (5 g, 14.01 mmol) in THF (100 mL) was added tBuOK (4 g, 35.71 mmol) at 0℃. The reaction mixture was stirred at 0 ℃for 4 h. LCMS showed the reaction was completed. The solution was diluted with water (200 mL) and extracted with EtOAc (100 mL × 3) . The combined organic layer was washed with brine, dried over Na2SO4 and concentrated to afford a residue which was purified by silica gel chromatography eluting with 30%of EA in PE to afford tert-butyl 2-fluoro-7, 8, 9, 10-tetrahydro-6H-azepino [1, 2-a] indole-11-carboxylate (300 mg, 7%) as yellow solid. MS (ESI) : mass calcd. for C18H22FNO2, 303.16, m / z found 304.2 [M+H] +.
[1085] Step 5
[1086] Synthesis of 2-fluoro-7, 8, 9, 10-tetrahydro-6H-azepino [1, 2-a] indole-11-carboxylic acid. To a solution of tert-butyl 2-fluoro-7, 8, 9, 10-tetrahydro-6H-azepino [1, 2-a] indole-11-carboxylate (200 mg, 0.66 mmol) in DCM (20 mL) was added TFA (0.5 mL) at 0℃, the reaction mixture was stirred at 0 ℃for 1 h. The reaction mixture was diluted with water (50 mL) and extracted with DCM (20 mL x 2) . The combined organic layer was washed with brine, dried over Na2SO4, and concentrated to dryness in vacuo directly to give 2-fluoro-7,8, 9, 10-tetrahydro-6H-azepino [1, 2-a] indole-11-carboxylic acid (120 mg, crude) as yellow solid. MS (ESI) : mass calcd. for C14H14FNO2, 247.10, m / z found 248.1 [M+H] +.
[1087] Step 6
[1088] Synthesis of tert-butyl 7- (2-fluoro-7, 8, 9, 10-tetrahydro-6H-azepino [1, 2...
Claims
1.A compound of Formula (II) : or a pharmaceutically acceptable salt thereofwhereinRing A is selected from the group consisting of 4-7 membered monocyclic heterocyclyl ring having 1-3 ring heteroatoms each independently selected from the group consisting of nitrogen, oxygen, and sulfur, 7-10 membered bicyclic heterocyclyl ring having 1-3 ring heteroatoms each independently selected from the group consisting of nitrogen, oxygen, and sulfur, or a 5-6 membered heteroaryl ring wherein Ring A may be substituted by one, two, or three R3;Ring B is 5-7 membered heterocyclyl ring containing 1-3 ring heteroatoms including the ring nitrogen to which it is attached, where the additional ring heteroatoms may each independently selected from the group consisting of nitrogen, oxygen, and sulfur, wherein Ring B may be substituted by one or two R2;W is selected from the group consisting of -C (O) -, -C (O) O-, -C (O) N (H) -, -C (O) OCH2-, -C (O) N (H) CH2-, and 5-membered heteroaryl ring having 1-3 ring heteroatoms;Z is CR1 or N;R1 for each occurrence is independently selected from the group consisting of hydrogen, halogen, -OH, C1-C3 alkyl (optionally substituted with one, two or three halogens) , C3-7cycloalkyl; and 3-7 membered heterocyclyl ring containing 1-3 nitrogen atoms;R2 for each occurrence is independently selected from hydrogen, halogen, C1-C3 alkyl (optionally substituted with one, two or three halogens) , -C (O) - (C1-C3 alkyl (optionally substituted with one, two or three halogens) ) , and -C (O) O- (C1-C3 alkyl (optionally substituted with one, two or three halogens) ) ;R3 is independently for each occurrence selected from the group consisting of halogen, C1-C3 alkyl (optionally substituted with one, two or three halogens) , C3-7cycloalkyl, 4-6 membered monocyclic heterocyclyl ring having 1-3 ring heteroatoms each independently selected from the group consisting of nitrogen, oxygen, and sulfur (optionally substituted with one, two or three halogens) ; andm is 1, 2, or 3.2.The compound of claim 1, wherein the compound is of Formula (I-a) , (I-b) , (I-c) , or (I-d) : or a pharmaceutical acceptable salt thereof.3.The compound of claims 1-2, wherein Ring A is 7-9 membered bicyclic heterocyclyl ring containing 1-3 ring heteroatoms each independently selected from the group consisting of nitrogen, oxygen, and sulfur.4.The compound of any one of claims 1-3, wherein Ring A is a bicyclo [2.2.2] heterocyclyl ring.5.The compound of any one of claims 1-3, wherein Ring A is a bicyclo [4.4.0] heterocyclyl ring.6.The compound of any one of claims 1-3, wherein Ring A is a bicyclo [3.3.1] heterocyclyl ring.7.The compound of any one of claims 1-3wherein Ring A is a bicyclo [2.2.1] heterocyclyl ring.8.The compound of any one of claims 1-3, wherein Ring A is a bicyclo [3.2.1] heterocyclyl ring.9.The compound of any one of claims 1-3, wherein Ring A is quinuclidinyl.10.The compound of any one of claims 1-3, wherein Ring A is nortropanyl.11.The compound of any one of claims 1-3, wherein Ring A is 3-oxa-9-azabicyclo [3.3.1] nonanyl.12.The compound of any one of claims 1-3, wherein Ring A is of 4-7 membered monocyclic heterocyclyl ring having 1-3 ring heteroatoms each independently selected from the group consisting of nitrogen, oxygen, and sulfur.13.The compound of claims 1, 2, or 12, wherein Ring A is selected from the group consisting of azetidinyl, pyrrolidinyl, and piperidinyl, wherein Ring A may be substituted by one, two, or three R3.14.The compound of claims 1, 2, or 12, wherein Ring A is selected from the group consisting of 15.The compound of claims 1, 2, or 12, wherein Ring A is selected from the group consisting of 16.The compound of any of claims 1-15, wherein W is -C (O) -.17.The compound of any of claims 1-15, wherein W is -C (O) O-.18.The compound of any of claims 1-15, wherein W is -C (O) N (H) -.19.The compound of any of claims 1-15, wherein W is -C (O) OCH2-.20.The compound of any of claims 1-15, wherein W is -C (O) N (H) CH2-.21.The compound of any of claims 1-15, wherein W is 5-membered heteroaryl ring having 1-3 ring heteroatoms.22.The compound of claim 21, wherein W is oxadiazole.23.A compound of Formula (II) : or a pharmaceutically acceptable salt thereofwhereinX is selected from the group consisting of-C (R”) 2-, -O-, and -N (H) -;W is selected from the group consisting of -C (O) O-, -C (O) N (H) -, and a 5-membered heteroaryl ring having 1-3 ring heteroatoms;R1 for each occurrence is independently hydrogen or halogenR2 is hydrogen or C1-C3 alkyl;R” for each occurrence is independently selected from hydrogen, halogen, and methyl;m is 1, 2, or 3;n is 0, 1, 2, or 3; andp is 0, 1, 2, 3.24.The compound of any of claims 1-23, wherein m is 1.25.The compound of any of claims 1-23, wherein m is 2.26.The compound of any of claims 1-23, wherein the compound is of Formula (II-a) or a pharmaceutically acceptable salt thereof.27.The compound of any of claims 1-23, wherein the compound is of Formula (II-a') or a pharmaceutically acceptable salt thereof,wherein each R1 may be the same or different.28.The compound of any of claims 1-27, wherein R1 is halogen.29.The compound of claim 28, wherein R1 is fluoro.30.The compound of any of claims 1-27, wherein R1 is hydrogen.31.The compound of any of claims 1-27, wherein R1 is C1-C3 alkyl.32.The compound of claim 31, wherein R1 is methyl.33.The compound of claim 23, wherein the compound is of Formula (II-a") or a pharmaceutically acceptable salt thereof.34.The compound of any of claims 1-33, wherein W is -C (O) O-.35.The compound of any of claims 1-33, wherein W is -C (O) N (H) -.36.The compound of any of claims 1-35, wherein W is a 5-membered heteroaryl ring having 1-3 ring heteroatoms.37.The compound of claim 36, wherein W is selected from the group consisting of pyrrolyl, pyrazolyl, imidazolyl, triazolyl, furanyl, oxazolyl, isoxazolyl, oxadiazolyl, thiophenyl, thiazolyl, isothiazolyl, and thiadiazolyl.38.The compound of any of claims 1-32, wherein the compound is of Formula (II-b) : or a pharmaceutically acceptable salt thereof.39.The compound of any of claims 1-38, wherein R2 is hydrogen.40.The compound of any of claims 1-38, wherein R2 is C1-C3 alkyl.41.The compound of claim 40, wherein R2 is methyl.42.The compound of any of claims 23-41, wherein X is -CH2-.43.The compound of any of claims 23-41, wherein X is -O-.44.The compound of any of claims 23-41, wherein X is -N (H) -.45.The compound of any of claims 23-44, wherein n is 0.46.The compound of any of claims 23-44, wherein n is 1.47.The compound of any of claims 23-46, wherein p is 1.48.The compound of any of claims 23-46, wherein p is 2.49.The compound of any of claims 1-48, wherein R3 is halogen.50.The compound of claim 49, wherein R3 is fluoro.51.A compound of Formula (III) : or a pharmaceutically acceptable salt thereofwhereinX is selected from the group consisting of-C (R”) 2--O-, and -N (H) -;W is selected from the group consisting of -C (O) O-, -C (O) N (H) -, and a 5-membered heteroaryl ring having 1-3 ring heteroatoms;R1 for each occurrence is independently hydrogen or halogenR2 is hydrogen or C1-C3 alkyl;R3 is selected from the group consisting of hydrogen, halogen, and C1-C3 alkyl (optionally substituted with one, two or three halogens) ;m is 1, 2, or 3;n is 0, 1, 2, or 3; andp is 0, 1, 2, 3.52.The compound of claim 51, wherein m is 1.53.The compound of any of claims 51-52, wherein m is 2.54.The compound of claim 51, wherein the compound is of Formula (III-a) or Formula (III-b) or a pharmaceutically acceptable salt thereof.55.The compound of claim 51, wherein the compound is of Formula (III-a’) or Formula (III-b’) or a pharmaceutically acceptable salt thereof,wherein each R1 may be the same or different.56.The compound of any of claims 51-55, wherein R1 is halogen.57.The compound of claim 56, wherein R1 is fluoro.58.The compound of any of claims 51-57, wherein R1 is hydrogen.59.The compound of any of claims 51-58, wherein R1 is C1-C3 alkyl.60.The compound of claim 59, wherein R1 is methyl.61.The compound of any of claims 51-60, wherein W is -C (O) O-.62.The compound of any of claims 51-60, wherein W is -C (O) N (H) -.63.The compound of any of claims 51-60, wherein W is a 5-membered heteroaryl ring having 1-3 ring heteroatoms.64.The compound of claim 63, wherein W is selected from the group consisting of pyrrolyl, pyrazolyl, imidazolyl, triazolyl, furanyl, oxazolyl, isoxazolyl, oxadiazolyl, thiophenyl, thiazolyl, isothiazolyl, and thiadiazolyl.65.The compound of any of claims 51-64, wherein R2 is hydrogen.66.The compound of any of claims 51-64, wherein R2 is C1-C3 alkyl.67.The compound of claim 66, wherein R2 is methyl.68.The compound of any of claims 51-67, wherein X is -CH2-.69.The compound of any of claims 51-67, wherein X is -O-.70.The compound of any of claims 51-67, wherein X is -N (H) -.71.The compound of any of claims 51-70, wherein n is 0.72.The compound of any of claims 51-70, wherein n is 1.73.The compound of any of claims 51-72, wherein p is 1.74.The compound of any of claims 51-72, wherein p is 2.75.The compound of any of claims 51-74, wherein R3 is halogen.76.The compound of claim 75, wherein R3 is fluoro.77.A compound selected from the group consisting of those found in Table 1.78.A pharmaceutical composition comprising a compound of any of claims 1-77 and a pharmaceutically acceptable adjuvant.79.A method of treating, ameliorating or preventing a disease, disorder, or injury comprising administering a therapeutically effective amount of the compound of any of claims 1-77, or the pharmaceutical composition of claim 78 to a subject in need thereof.80.The method of claim 79, wherein the disease, disorder, or injury is selected from the group consisting of pulmonary artery hypertension PAH, asthma, chronic obstructive pulmonary disease COPD, pulmonary fibrosis (e.g., idiopathic pulmonary fibrosis IPF, cystic fibrosis) , a coronavirus infection (e.g., SARS-COV2 infection) , acute lung injury, respiratory distress syndrome, respiratory failure, small cell lung cancer, interstitial lung disease, chronic obstructive pulmonary disease, and chronic thromboembolic pulmonary hypertension.81.The method of claim 79, wherein the disease, disorder, or injury is pulmonary artery hypertension.82.A method of treating, ameliorating or preventing cardiovascular disease, a cardiovascular disorder, or cardiac injury comprising administering a therapeutically effective amount of the compound of any of claims 1-77, or the pharmaceutical composition of claim 78 to a subject in need thereof.83.The method of claim 82, wherein the ischemia-reperfusion injury is a result of myocardial infarction or ischemic stroke.84.The method of any of claims 82-83, wherein the subject is at high risk of developing the disease or condition.85.The method of claim 82, wherein the cardiovascular disease or cardiovascular disorder, is selected from the group consisting of: arrhythmia, aorta disease, cardiomyopathy, congenital heart disease, coronary artery disease, deep vein thrombosis, heart valve disease, hypertension, Marfan syndrome, pericardial disease, pulmonary embolism, rheumatic heart disease, vascular disease, and drug induced cardiotoxicity.86.The method of any of claims 82-85, wherein the subject is expected to undergo coronary artery bypass grafting (CABG) surgery.87.The method of any of claims 82-85, wherein the subject has undergone CABG surgery.88.The method of any of claims 82-87, wherein the compound of any of claims 1-77, or the pharmaceutical composition of claim 78 is administered to the subject by a route selected from the group consisting of: intravenous administration, intracardiac administration, and administration within a cardioplegic solution.89.The method of any of claims 82-88, wherein, following administration of the compound of any of claims 1-77, or the pharmaceutical composition of claim 78 to a subject in need thereof, the subject has reduced symptoms selected from the group consisting of arrhythmias, microvascular dysfunction, myocardial stunning and myocyte death.90.The method of any of claims 82-88, wherein cardiomyocytes of the subject exhibit reduced reactive oxygen species production following administration of the compound of any of claims 1-77, or the pharmaceutical composition of claim 78 compared to cardiomyocytes prior to administration of the compound of any of claims 1-77, or the pharmaceutical composition of claim 78 or compared to control samples of cardiomyocytes.91.The method of any one of the above claims, wherein cardiomyocytes from the subject exhibit reduced release of Troponin I following administration of the compound of any of claims 1-77, or the pharmaceutical composition of claim 78 compared to cardiomyocytes or cardiac tissue prior to administration of the compound of any of claims 1-77, or the pharmaceutical composition of claim 78 or compared to control samples of cardiomyocytes or cardiac tissue from subjects that have not been administered the compound of any of claims 1-77, or the pharmaceutical composition of claim 78.92.The method of any one of the above claims, wherein cardiomyocytes form the subject exhibit a cellular response selected from the group consisting of: reduced cell death, increased cell survival, decreased cell damage, and reduced oxidative stress, following administration of the compound of any of claims 1-77, or the pharmaceutical composition of claim 78 compared to cardiomyocytes prior to administration of the compound of any of claims 1-77, or the pharmaceutical composition of claim 78 or compared to control samples of cardiomyocytes, or cardiac tissue from subjects that have not been administered the compound of any of claims 1-77, or the pharmaceutical composition of claim 78.93.The method of any one of the above claims, wherein administration of the compound of any of claims 1-77, or the pharmaceutical composition of claim 78 causes increased aortic velocity in the subject as compared to prior to administration of the compound of any of claims 1-77, or the pharmaceutical composition of claim 78 or subjects that have not been administered the compound of any of claims 1-77, or the pharmaceutical composition of claim 78.94.The method of any one of the above claims, wherein administration of the compound of any of claims 1-77, or the pharmaceutical composition of claim 78 causes improved cardiac output in the subject as compared to prior to administration of the compound of any of claims 1-77, or the pharmaceutical composition of claim 78 or subjects that have not been administered the compound of any of claims 1-77, or the pharmaceutical composition of claim 78.95.The method of any one of the above claims, wherein administration of the compound of any of claims 1-77, or the pharmaceutical composition of claim 78 causes a reduction of indicators of cardiovascular disease selected from the group consisting of: decreased collagen deposition, decreased fibroblast differentiation into myofibroblasts, increased or decreased expression of Smad Binding Elements (SBE) , increased cardiac contractile force generation or contractility, increased or enhanced maintenance of calcium handling, decreased hypertrophy (cell size) , and decreased expression of cardiac hypertrophic marker genes.96.A method of treating a subject that has undergone myocardial infarction or cardiac arrest, and is in need of treatment, comprising: administering a therapeutically effective amount of the compound of any of claims 1-77, or the pharmaceutical composition of claim 78 to the subject after the myocardial infarction or cardiac arrest.97.The method of claim 96, wherein the compound of any of claims 1-77, or the pharmaceutical composition of claim 78 causes reduced infarct size in the heart tissue of the subject compared to a subject that was not administered the compound of any of claims 1-77, or the pharmaceutical composition of claim 78 after myocardial infarction or cardiac arrest.98.The method of claim 96 or 97, wherein the compound of any of claims 1-77, or the pharmaceutical composition of claim 78 causes reduced cardiac tissue wall thinning after the myocardial infarction or cardiac arrest.99.The method of claims 96-98, wherein the compound of any of claims 1-77, or the pharmaceutical composition of claim 78 causes reduced granulation of cardiac tissue after the myocardial infarction or cardiac arrest.100.The method of any one of claims 96-99, wherein the compound of any of claims 1-77, or the pharmaceutical composition of claim 78 causes reduced neovascularization in cardiac tissue after the myocardial infarction or cardiac arrest.101.The method of any one of claims 96-100, wherein the compound of any of claims 1-77, or the pharmaceutical composition of claim 78 causes reduced neovascularization in cardiac tissue after the myocardial infarction or cardiac arrest.102.The method of any one of the above claims, wherein the compound of any of claims 1-77, or the pharmaceutical composition of claim 78 is administered in more than one dose.103.The method of any one of the above claims, wherein the compound of any of claims 1-77, or the pharmaceutical composition of claim 78 is administered in combination with at least one additional therapeutic agent.104.A method of preventing or minimizing cardiac injury in a subject at risk of myocardial infarction or cardiac arrest, comprising: administering to the subject an effective amount of the compound of any of claims 1-77, or the pharmaceutical composition of claim 78 before the myocardial infarction or cardiac arrest, thereby preventing or ameliorating cardiovascular damage.105.The method of claim 104, wherein the subject at risk of myocardial infarction or cardiac arrest has a cardiovascular disease or condition selected from the group consisting of: arrhythmia, aorta disease, cardiomyopathy, congenital heart disease, coronary artery disease, deep vein thrombosis, heart valve disease, hypertension, Marfan syndrome, pericardial disease, pulmonary embolism, rheumatic heart disease, and vascular disease.106.The method of claim 104 or 105, wherein the compound of any of claims 1-77, or the pharmaceutical composition of claim 78 is administered in more than one dose.107.A method of reducing cardiac damage in a subject resulting from coronary artery bypass grafting (CABG) surgery, comprising administering to the subject, before, after and / or during the surgery, a therapeutically effective amount of the compound of any of claims 1-77, or the pharmaceutical composition of claim 78.108.A method of reducing cardiac damage in a subject resulting cardiopulmonary bypass surgery, comprising administering to the subject, before, after and / or during the surgery, a therapeutically effective amount of the compound of any of claims 1-77, or the pharmaceutical composition of claim 78.109.The method of claim 108, wherein the compound of any of claims 1-77, or the pharmaceutical composition of claim 78 is administered in more than one dose.110.The method of any one of claims 108-109, wherein the compound of any of claims 1-77, or the pharmaceutical composition of claim 78 is administered prior to surgery, following surgery or both prior to and following surgery.111.A method of treating a subject with cardiac tissue damage, and is in need of treatment, comprising: administering a sufficient amount of the compound of any of claims 1-77, or the pharmaceutical composition of claim 78 to the subject, thereby ameliorating the cardiac tissue damage.112.The method of claim 111, wherein the compound of any of claims 1-77, or the pharmaceutical composition of claim 78 causes reduced neovascularization in the damaged cardiac tissue.113.The method of any one of the above claims, wherein the compound of any of claims 1-77, or the pharmaceutical composition of claim 78 is administered in combination with at least one additional therapeutic agent.114.The method of claim 113, wherein the at least one additional therapeutic agent is an agent selected from the group consisting of an agent that: reduces cholesterol, reduces low-density lipoprotein, reduces system blood pressure, and reduces blood glucose levels.115.The method of any one of the above claims, wherein the method increases overall survival rate of the subjects compared to subjects that have not been administered the compound of any of claims 1-77, or the pharmaceutical composition of claim 78.116.The method of claim 79, wherein the disease or disorder is a pulmonary disease or pulmonary disorder.117.The method of claim 116, wherein the disease or disorder is an obstructive lung disease or a restrictive lung disease.118.The method of claim 116, wherein the disease or disorder is selected from the group consisting of asthma, bronchiolitis obliterans organizing pneumonia (BOOP) , chronic obstructive pulmonary disease (COPD) , emphysema, pulmonary fibrosis, and sarcoidosis.119.The method of claim 116, wherein the disease or disorder is selected from the group consisting of acute chest syndrome, acute respiratory distress syndrome, alpha-1 antitrypsin deficiency, asbestosis, aspergillosis, asthma, bronchiectasis, bronchiolitis, bronchiolitis obliterans, bronchitis, bronchopulmonary dysplasia, chronic cough, chronic obstructive pulmonary disease (COPD) , coccidioidomycosis, cryptogenic organizing pneumonia, cystic fibrosis, e-cigarette, or vaping product, use associated lung injury (EVALI) , emphysema, eosinophilic granulomatosis with polyangiitis (EGPA) , common cold, hantavirus pulmonary syndrome (HPS) , histoplasmosis, human metapneumovirus (hMPV) , hypersensitivity pneumonitis, idiopathic pulmonary fibrosis (IPF) , infectious lung diseases, influenza, interstitial lung disease (ILD) , Legionnaires' disease, lung cancer, LAM, MAC lung disease, mesothelioma, NTM lung disease, an occupational lung disease, pertussis, pneumonia, pneumothorax, primary ciliary dyskinesia (PCD) , pulmonary arterial hypertension (PAH) , pulmonary embolism, pulmonary fibrosis, pulmonary hypertension, respiratory syncytial virus, sarcoidosis, silicosis, sleep apnea, coronavirus related disease, and tuberculosis.120.The method of claim 119, wherein bronchitis is acute bronchitis or chronic bronchitis.121.The method of claim 116, wherein the disease or disorder is selected from the group consisting of aspergillosis, asthma, bronchiectasis, bronchitis, chronic cough, chronic obstructive pulmonary disease (COPD) , common cold, croup, cystic fibrosis, hantavirus pulmonary syndrome (HPS) , idiopathic pulmonary fibrosis (IPF) , influenza, lung cancer, LAM, MAC lung disease, pertussis, pleurisy, pneumonia, pulmonary embolism, pulmonary hypertension, respiratory syncytial virus, sarcoidosis, sleep apnea, spirometry, sudden infant death syndrome, tobacco endgame, and tuberculosis.