35results about "Isotope introduction to steroids" patented technology

The invention relates to an ursodeoxycholic acid compound for preventing or treating an FXR (farnesol X receptor)-mediated disease. Specially, the invention discloses the ursodeoxycholic acid compound shown in formula (I) and a drug combination containing the compound or the crystalline pharmaceutically-acceptably salt of the compound, a produg, tautomer, stereisomer, enantiomer, aquo-complex or solvate. The compound can serve as FXR stimulant and then is applicable to preparation of drugs for treating FXR related diseases such as fatty liver.

The invention discloses a deuterated compound synthesis method, which comprises: carrying out a mixing reaction on a halogenated compound represented by a formula (I), a sulfide represented by a formula (II), a promoter, an alkali and a deuteration solvent to obtain a reduced deuterated product represented by a formula (III), wherein the reaction equation of the reaction is defined in the specification, R<1>, R<2>, R<3> and R<4> respectively are at least one selected from alkyl, aryl, acyl, hydrogen atom and deuterium atom, and X is at least one selected from iodine, bromine and chlorine. According to the present invention, the deuteration marking of the compound is efficiently achieved by using the common heavy water and the deuterated alcohol as the deuterium source through the simple reduction reaction, such that the use of expensive, toxic, flammable and explosive deuterium source reagents is not required compared with the prior art. The formulas I, II and III are defined in the specification.

Methods for fluorinating organic compounds utilizing a novel organic reagent are described herein. The invention further discloses the utility of this reagent for incorporation of the 18 F isotope into hydroxyl group-containing organic molecules for PET imaging studies. Preparation of the reagents is described along with isolable intermediate structures from reaction of the reagent with a hydroxyl group-containing organic molecule.

The invention relates to a new photocatalytic fixed-point deuteration method for carbon-carbon unsaturated bonds. The method is characterized in that an olefin or alkyne compound and a deuterium source undergoes a deuteration reaction under the catalysis of a light source and a photocatalyst to obtain a deuterated product, wherein the deuterium source is deuterated water, deuterated alcohol or deuterated acid, and the reaction temperature is between room temperature and 80 DEG C. The fixed-point deuteration reaction of the olefin or alkyne compound is realized under the photocatalysis action of the photocatalyst with environmentally-friendly and cheap deuterated water or a deuteration reagent as a deuterium source to substitute deuterium gas. Compared with traditional deuteration reactions, the method has a higher selectivity, milder reaction conditions and higher economical suitability, and is suitable for large-scale deuterated chemical substance production.

The invention discloses a receptor molecularly-targeted imaging agent and a preparation method and application thereof. The receptor molecularly-targeted imaging agent comprises a polyethylene glycol short chain which is linked with 17alpha-ethinyloestradiol of a target estrogen receptor through 'click' reaction. The receptor molecularly-targeted imaging agent is shown as a concrete general molecular formula in the description, wherein the 17alpha-ethinyloestradiol serves as a targeting group, polyethylene glycol serves as a hydrophilic group, and <18>F serves as a radioactive group. The receptor molecularly-targeted imaging agent has excellent biological properties and high specificity, is high in uptake when used in positive breast cancer tumors of the estrogen receptor and capable of distinguishing between estrogen positive receptors and estrogen negative receptors, and meets the conditions as a breast cancer receptor imaging agent.

The present invention relates to a method for synthesizing a radiopharmaceutical using a cartridge, which makes it possible to carry out several steps of reaction required for synthesizing a radiopharmaceutical in the cartridge filled with a polymer. A method for synthesizing a radiopharmaceutical according to the present invention enables each step's reaction to be carried out with the solution confined in the cartridge so as not to flow out, thus being simplified compared to the conventional methods for synthesizing radiopharmaceuticals, and expediting the synthesis thereof.

Compounds of general formula (I) wherein (I) R1-R4 are each independently selected from H and deuterium; and at least one of R1-R4 is deuterium. The compounds have been found to be particularly useful for treating neurodegenerative conditions and in particular but not exclusively conditions such as motor neurone disease.

Disclosed are deuterated chenodeoxycholic acid derivatives and pharmaceutical compositions containing the deuterated chenodeoxycholic acid derivatives. In particular, disclosed is a deuterated chenodeoxycholic acid derivative of formula (I), or a crystal form, pharmaceutically acceptable salt, hydrate or solvate thereof, and a pharmaceutical composition containing the same. The deuterated chenodeoxycholic acid derivatives of formula (I) can be used to treat and/or prevent diseases related to the farnesoid X receptor (FXR) and/or G-protein coupled bile acid receptor, such as nonalcoholic steatohepatitis, nonalcoholic fatty liver diseases, gallstones, primary biliary cirrhosis, and cirrhosis.

The invention belongs to the technical field of fine chemicals, and particularly relates to a method for preparing deuterated aldehyde through a deuteration reaction of aldehyde under synergistic catalysis of visible light and small organic molecules. The method comprises the following steps: mixing aldehyde with a photocatalyst 4CzIPN, an organic micromolecular catalyst triisopropylsilyl mercaptan ((i-Pr)3SiSH), sodium carbonate (NaCO3), deuterated water and an organic solvent, blowing argon into a reaction bottle, conducting reacting under the irradiation of blue light with a power of 36 W and a wavelength of 470 nm, removing the solvent through spinning, and carrying out column chromatography to obtain a pure product.

The invention relates to particular prodrugs and analogs of (3α,5α)-3-hydroxy-21-(1H-imidazol-1-yl)-3-methoxymethyl)-pregnan-20-one, in free or pharmaceutically acceptable salt and/or substantially pure form as described herein, pharmaceutical compositions thereof, and methods of use as sedatives, hypnotics, anxiolytics, and/or anesthetics, and methods for treatment of depression, anxiety, insomnia, epilepsy, and other central nervous system disorders, as well as to combinations with other agents.

The invention provides a substituted steroid compound and its application. Specifically, the substituted steroid compound of the present invention is a steroid compound represented by formula (I), or its crystal form, pharmaceutically acceptable salt, prodrug, stereoisomer, hydrate or solvent compound. The substituted steroidal compound disclosed in the present invention and the composition containing the compound have excellent inhibitory properties on CYP17 enzyme and androgen receptor (AR), and have better pharmacokinetic parameter characteristics, and can improve the Drug concentration in animals to improve drug efficacy and safety.

The invention provides an alpha-monodeuterated alcohol compound and a reduction deuteration method of an aldehyde ketone compound for preparing the alpha-monodeuterated alcohol compound. The aldoketone compound shown in a general formula (1) reacts with a divalent lanthanide transition metal compound and a deuterium donor reagent in an organic solvent I to generate the alpha-monodeuterated alcohol compound shown in a general formula (2). The invention establishes a reduction deuteration method of an aldehyde ketone compound based on a single electron transfer reduction deuteration reaction, and the method is used for preparing the alpha-monodeuterated alcohol compound shown in a general formula (2) as well as deuterated derivatives of aldehyde ketone drugs, hormones and natural products of the alpha-deuterated alcohol compounds. The method has the advantages of high product deuteration rate, good regioselectivity, good chemical selectivity, low reagent price, simple operation, mild conditions and wide substrate application range. Compared with an existing H/D exchange method, the deuterium donor reagent is small in dosage, the cost can be remarkably reduced, and the utilization rate of deuterium atoms is increased.

The present invention relates to a 16[alpha],16[beta],17[beta]-tris-deuterium-1,4-androstenedione synthesis method, which comprises: (A1) mixing 1,4-androstenedione and deuterated water in a first solvent, and carrying out heating reflux under the catalytic effect of a weak alkaline salt; (A2) extracting the reflux reaction liquid, and concentrating the extracted organic phase to obtain an intermediate product 16[alpha],16[beta]-di-deuterium-1,4-androstenedione; (A3) mixing the intermediate product and sodium borodeuteride in a second solvent, and carrying out selective reduction under an ice bath condition; (A4) acidifying the reduction reaction liquid to achieve the pH value of less than or equal to 2; and (A5) extracting the acidified reduction reaction liquid, and separating the organic phase by using a column chromatography method to obtain the target product 16[alpha],16[beta],17[beta]-tris-deuterium-1,4-androstenedione. The synthesis method of the present invention has advantages of simple reaction route, high product purity, low cost, and the like.

The invention discloses a method for hydrogenolysis of halides. The invention discloses a preparation method of a compound represented by a formula I. The preparation method comprises the following step: in a polar aprotic solvent, zinc, H2O and a compound represented by a formula II are subjected to a reaction as shown in the specification, wherein X is halogen; Y is -CHR<1>R<2> or R<3>; hydrogenin H2O exists in the form of natural abundance or non-natural abundance. According to the preparation method, halide hydrogenolysis can be simply, conveniently and efficiently achieved through a simple and mild reaction system, and good functional group compatibility and substrate universality are achieved.

The invention discloses a method for selective deuteration of aromatic ring benzyl carbon-hydrogen bonds. According to the method, a metal rhodium catalyst is used for performing eta6 coordination activation on an aromatic ring, so that hydrogen-deuterium exchange can be selectively performed on the aromatic ring and a deuterated reagent at a benzyl position; strong acid or strong alkali does not need to be added, the cheap and easily available deuterated reagent is adopted as a deuterium source, so that the method has good universality for various aromatic hydrocarbons with different functional groups, can be applied to later selective deuteration of complex drug molecules, and has high application value.

The invention provides an automatic synthesis method of 16 alpha-[18F]fluoro-17 beta-estradiol (18F-FES). The automatic synthesis method comprises the following steps: performing [18F] nucleophilic fluorination reaction of precursor 3-O-(methoxymethyl)-16,17-O-sulfonyl-16-estradiol (MMSE), hydrolysis reaction of a non-separated [18F] fluorinated intermediate and an alcohol-containing acidic solution as well as liquid-phase separation and purification through a substituted solid-phase column in the same reaction flask of an automatic synthesis module, thereby obtaining the product 18F-FES. Theautomatic synthesis method can realize automatic production of 16 alpha-[18F]fluoro-17 beta-estradiol by adopting a conventional FDG synthesis module and is short in total synthesis time and high in radiochemical yield.

The present invention relates to a precursor of positron emission tomography (PET) radioactive medical supplies, a preparation method thereof, and an application thereof, and more specifically, to a precursor having a tetravalent organic salt leaving group, a preparation method, and a method for preparing desired PET radioactive medical supplies in a high radiochemical yield within a short preparation time by introducing ¹⁸F using the same through a single step. The precursor having a tetravalent organic salt leaving group of the present invention can simplify the known complex multistep preparation of radioactive medical supplies into a single step, can save production costs because an excessive amount of a phase transfer catalyst is not required, facilitates separation of a compound after reaction, and enables rapid reaction velocity. The features are appropriate for the mass production of PET radioactive medical supplies by an automated synthesis system.