30results about How to "Good functional group tolerance" patented technology

The invention provides a method for synthesizing a 2,3-dihydrobenzofurans compound. The method comprises the following steps: dissolving aromatic iodide, an epoxy compound, a palladium catalyst, a phosphine ligand and a norborene derivative in an organic solvent together; then carrying out stirring reaction at the temperature of 30-120 DEG C; and carrying out separation and purification after reaction to obtain the 2,3-dihydrobenzofurans compound. By the method, the 2,3-dihydrobenzofurans compound can be synthesized efficiently, economically and environmentally friendly. The method is gentle in condition, good in substrate universality and high in yield, and the prepared 2,3-dihydrobenzofurans compound is widely applied to the fields of medicinal chemistry and organic chemistry.

The invention discloses a method for synthesizing alkyne sulfone compounds from terminal alkyne and sulfonyl hydrazine. According to the method, a series of the alkynyl sulfone compounds are synthesized through an oxidative cross-coupling reaction of terminal alkyne and sulfonyl hydrazine, and the method does not need pre-functionalization of alkyne, and has the advantages of high atom economy, nometal or oxidant, good functional group tolerance and the like. The compounds synthesized by the method are subjected to in-vitro antitumor activity screening, and experimental results show that mostof the compounds have relatively strong inhibitory activity on tumor cells.

The invention discloses a magnesium assisted nickel catalyzed multi-fluoro aromatic hydrocarbon monoarylation method. The method realizes cross coupling of multi-fluoro aromatic hydrocarbon and aryl halide or aryl sulfonate by adopting a compound formed by a nickel source and a diphosphine ligand as a catalyst. The coupling method has the advantages of high controllability, high monoarylation product proportion reaching 99% or above, good function group tolerance, wide substrate applicability, and realization of the yield of 80-96%. Compared with methods adopting previous catalysis catalysts (palladium system and copper system), the method adopting a brand new nickel catalysis system has the advantages of realization of cross coupling under mild conditions, excellent selectivity, low price, simplicity in operation, easiness in post-treatment, small pollution, and high social values and industrial promotion prospect.

The invention discloses a biaryl compound as well as a preparation method and application thereof. The preparation method comprises the following steps: reacting magnesium chips and lithium chloride in a schlenk sealed tube to obtain a reactant 1, adding ultra-dry tetrahydrofuran into the sealed tube, extracting nitrogen from the sealed tube, then adding aryl quaternary ammonium salt, a 5mol% catalyst, aryl bromide and N, N, N' N'-tetramethyldisiloxane, stirring and reacting at 25-60 DEG C for 6-12 hours to obtain a reactant 2, and finally, sequentially carrying out extracting, washing, drying, extract liquor removing and purifying on the reactant 2 to obtain the biaryl compound which can be used for preparing a compound containing a biaryl structure. The preparation method is wide in substrate range, convenient to operate, mild in reaction condition, low in pollution and high in economic benefit, and the obtained biaryl compound has good functional group tolerance and substrate universality.

The invention provides tetrahydrobenzofuran Mannich alkali compounds. The structural formula of the tetrahydrobenzofuran Mannich alkali compounds is shown in the specification, wherein R is hydrogen or methyl, R2 and R3 comprise any one of methyl, ethyl, n-propyl, isopropyl, n-butyl, hydroxyethyl, a C4 or C5 methylene chain and an N atom-containing C4 or C5 methylene chain. A preparation method comprises the steps: taking cuprous iodide as a catalyst, dimethyl sulfoxide as a solvent, and a formaldehyde aqueous solution (preferably 30% formaldehyde aqueous solution), secondary amine and furanocyclohexanone oxime ethers as raw materials, and preparing a series of long-chain tetrahydrobenzofuranone Mannich alkalis through a one-pot reaction. The reaction product is single, no side reaction occurs, good functional group tolerance is achieved, and secondary amine containing hydroxyl and heteroatoms has no influence on the reaction. The prepared product is applied to anti-gastric cancer drugs, and a remarkable effect is achieved.

The invention discloses a chiral vicinal diamine derivative. The chiral vicinal diamine derivative is a compound as shown in a formula I, or tautomer, enantiomer and diastereoisomer thereof, wherein Ar1 and Ar2 are selected from aryl and ceteroary respectively; the aryl and ceteroary do not have substituent group or have one or more substituent groups; R1 is selected from hydrogen, alkyl, phenyl, esteryl and methylene; when R1 is methylene, an A ring is formed through 0 to 5 methylene; X is selected from N3, NH2, NHBoc and N(Bn)2; B rings are 4 to 7 saturated or unsaturated heterocyclic rings; M is carbon or nitrogen; when M is carbon, G is selected from hydrogen, alkyl, alkoxy and esteryl; when M is nitrogen, G is selected from Ms, Ts, Boc and Bn. The invention further discloses a catalytic asymmetric synthesis method of the chiral vicinal diamine derivative. The method has a wide substrate range, excellent functional group tolerance and mild reaction conditions, is high in yield and good in enantioselectivity, and belongs to a convenient and practical method.

The invention provides a method for synthesizing benzimidazole and its derivative. The synthesis of polyfunctional benzimidazole and 2-substituted benzimidazole is achieved by imidazole chloride catalyzed o-phenylenediamine cyclization. The method is simple and economical and strong in practicability. No catalyst or additive is added. The synthesis method has good functional group tolerance, excellent yield and purity and short reaction time, does not require harsh reaction conditions and is suitable for industrial production.

The invention discloses a 1,1-diarylalkane derivative preparation method, wherein a C(sp3)-C(sp3)/C(sp3)-C(sp2) bond is constructed under light oxidation-reduction catalytic conditions by using an olefin-based compound, (hetero) aromatic hydrocarbon and a N-hydroxy phthalimide ester compound as raw materials so as to achieve the 1,2-difunctionalization reaction of olefin, such that a series of 1,1-diaryl alkane derivatives are prepared.

The invention discloses a 2-hydroxypyridine compound and a synthesis method and application thereof. According to the method, enaminone is used as a starting raw material, tempo salt is used as an oxidizing agent, and the 2-hydroxypyridine compound is generated through an oxidation reaction and a coupling cyclization reaction under a heating condition. The reaction functional group is high in compatibility, the yield is as high as 80%, and the product has functional group diversity. The compound can be used as an organic synthesis precursor, and 2-hydroxyl and 6-hydrogen atoms in the structurecan be further functionalized to obtain a drug molecular skeleton or a compound with potential biological activity and the like.

The invention provides a synthetic method of a nitrile compound, which is characterized in that imidazole hydrochloride is used as a reaction aid, and the nitrile compound is synthesized from an aldehyde compound and hydroxylamine hydrochloride by a one-pot method in the absence of other catalysts or additives. The synthesis method disclosed by the invention has good functional group tolerance and can be used for synthesizing various nitrile compounds. According to the synthesis method, corrosive concentrated hydrochloric acid and a metal catalyst are not used, strict reaction conditions, gas protection and an autoclave are not needed, the reaction time is short, and the synthesis method has important value in industrial production.

The invention discloses a method for preparing methyl (hetero) arene through decarbonylation coupling of (hetero) aryl formic acid and trimethylcyclotrioxane under catalysis of transition metal. According to the method, (hetero) aryl formic acid, trimethylcycloborane, a palladium-containing catalyst, a phosphine ligand, an anhydride additive and a solvent are mixed and react in an inert gas atmosphere to obtain a methyl (hetero) aromatic hydrocarbon product. The method uses stable, cheap and easily available (hetero) aryl formic acid as a raw material to synthesize methyl (hetero) aromatic hydrocarbon, can make up for the defects existing in the traditional coupling reaction of transition metal catalyzed halogenated (hetero) aromatic hydrocarbon and a nucleophilic methylation reagent, and has the following advantages: (1) use of expensive and difficult-to-prepare halogenated (hetero) aromatic hydrocarbon is avoided, and generation of halogen-containing waste is avoided; (2) the use of unstable raw materials such as a methyl Grignard reagent and methylboronic acid is avoided, and the reaction has better functional group tolerance; and (3) the (hetero) aryl formic acid raw material and the product have large polarity difference, and are easy to separate through column chromatography.

The invention discloses a preparation method of a poly(enamine nitrile) compound, wherein the preparation method comprises the following steps: carrying out polymerization reaction on a binary nitrile compound, a binary isonitrile compound and a polymerization catalyst in an organic solvent to obtain the poly(enamine nitrile) compound, wherein the polymerization catalyst comprises cuprous iodide and potassium tert-butoxide. A polymerization reaction implementation process is simple in process, and reaction raw materials are easy to obtain and can be directly purchased or prepared through a simple reaction; polymerization reaction conditions are mild, polymerization can be carried out at room temperature, and energy is saved; the polymerization efficiency is high, and a polymer with relatively high molecular weight can be obtained after 4 hours of reaction; and no by-product is generated in the polymerization process, and the atom economy is met. The invention also discloses the poly(enamine nitrile) compound which has good processability and high thermal stability.

The invention discloses a mass spectrometry method for a compound containing a carbon-carbon double bond. The mass spectrometry method comprises the following steps: a) carrying out labeling reaction on light and heavy isotope labeling reagents and the compound containing the carbon-carbon double bond in a target analyte; b) carrying out post-treatment on a product after the marking reaction and then carrying out mass spectrometry; wherein the light isotope labeling reagent is [d0]-bis (pyridine) iodine tetrafluoroborate, and the heavy isotope labeling reagent is [d10]-bis (pyridine) iodine tetrafluoroborate. Experiments prove that the method not only can significantly improve the mass spectrum recognition of the compound containing the carbon-carbon double bond, but also has universality and wide application range, can be suitable for mass spectrum direct analysis, can also be suitable for liquid chromatography and mass spectrum combined analysis, can be used for quantitative analysis of the compound containing the carbon-carbon double bond in a complex system, and has wide application prospects. And the method has important value and practicability for realizing rapid, efficient and accurate mass spectrometry of compounds containing carbon-carbon double bonds in complex samples.

The invention belongs to the technical field of intermediate synthesis and particularly relates to a method using a one-step method to synthesize 2-amino-5-chloropyridine in a high-selectivity manner.The method includes: adding 2-aminopyridine serving as the raw material into an organic solvent, dropwise adding bromine to serve as the catalyst under the irradiation of a blue LED lamp, and feedingchlorine after solution fading to perform chlorination reaction; subjecting obtained reaction liquid to reduced pressure distillation to obtain a crude product, and performing further recrystallization to obtain high-purity 2-amino-5-chloropyridine. The method has the advantages that the bromine is used as the catalyst, the bromine is irradiated by the blue light LED lamp to generate bromine freeradicals combining with the 5 site of a 2-aminopyridine ring, then chlorination is performed, product 2-amino-5-chloropyridine cascade reaction, which generates polychloro compounds, caused by directchlorination is avoided, good chlorination selectivity is achieved, and the high-content 2-amino-5-chloropyridine is obtained; compared with the prior art, the method is simplified in production process, mild in reaction condition, high in product purity, low in production cost and low in wastewater quantity.

The invention provides a method for photocatalytic synthesis of an alkaloid. The alkaloid comprises an indole fused ring compound and an indole spiro compound. The method comprises the following steps: synthesizing a 3-acetal-2-indole ketone compound from azoaryl acrylamide serving as a raw material and a peroxide under photocatalysis; hydrolyzing to obtain a 3-formyl-2-indole ketone compound; further reducing to synthesize the alkaloid. The method is mild in route, and has high efficiency. A reaction can occur under room temperature illumination under mild conditions, and better substrate versatility and functional group tolerance are achieved.

The invention provides a polycyclic carbamoyl pyridone analogue which is used as a polycyclic carbamoyl pyridone analogue and can be used as a medicine raw material or an intermediate for synthesizing a novel anti-influenza virus medicine. The polycyclic carbamoyl pyridone analogue is obtained by cyclization of the o-amino amide derivative and chloroacetaldehyde under the action of alkali without any other catalyst or additive, harsh reaction conditions are not needed, and the method is simple to operate and suitable for industrial production. The invention also discloses application of the polycyclic carbamoyl pyridone analogue in serving as an impurity reference substance of baloxavir dipivoxil analogue drugs.