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30results about How to "Conducive to green industrial production" patented technology

Preparation method of vitamin A acetate intermediate C15 and vitamin A acetate

The invention provides a preparation method of a vitamin A acetate intermediate C15 and vitamin A acetate. The method comprises the following steps: taking 1-halogenated-2-methyl-4-acetoxy-2-butene asa raw material, preparing a corresponding Wittig reagent through a substitution reaction with triphenylphosphine or triester phosphite, then carrying out a Wittig reaction with beta-cyclocitral, hydrolyzing an ester group under an alkaline condition, acidifying to obtain a corresponding halide, and carrying out a substitution reaction with triphenylphosphine or triester phosphite again to prepareC15. The vitamin A acetate can be prepared by carrying out a Wittig reaction on the obtained C15 and 2-methyl-4-acetoxy-2-butenal under an alkaline condition. The method has the advantages of singlereaction type, easy operation and realization of reaction conditions, safe and environment-friendly operation, simple post-treatment and low cost; and the reaction activity is strong, the reaction selectivity is high, the atom economy is high, and the target product yield and purity are high.
Owner:XINFA PHARMA

Preparation method of vitamin A ester intermediate C15 and vitamin A ester

The invention provides a preparation method of a vitamin A ester intermediate C15 and vitamin A ester. The method comprises the following steps: carrying out a halogenation reaction and a cyclizationreaction on 3, 7-dimethyl-3-hydroxy-1, 6-octadiene as an initial raw material, carrying out a substitution reaction on the obtained product and triphenylphosphine or triester phosphite to prepare a corresponding Wittig reagent, carrying out a Wittig reaction on the Wittig reagent and 2-methyl-4-acetoxy-2-butenal, performing acidifying, hydrolyzing and acidifying the obtained product, and carryingout a substitution reaction on the hydrolyzed and acidified product and triphenylphosphine or triester phosphite to prepare C15. The vitamin A ester can be prepared by carrying out a Wittig reaction on the obtained C15 and 2-methyl-4-R3 substituent carbonyloxy-2-butenal. The method has the advantages of single reaction type, easy operation and realization of reaction conditions, safe and environment-friendly operation, simple post-treatment and low cost; and the reaction activity is strong, the reaction selectivity is high, the atom economy is high, and the target product yield and purity arehigh.
Owner:XINFA PHARMA

3-aminomethyl tetrahydrofuran preparation method

The invention provides a 3-aminomethyl tetrahydrofuran preparation method, which comprises: carrying out a condensation reaction by using tetrahydrofuran-3-one and nitromethane as raw materials to obtain 3-nitromethylene tetrahydrofuran, and carrying out catalytic hydrogenation reduction to obtain 3-aminomethyl tetrahydrofuran. According to the invention, the method has advantages of cheap and easily available raw materials, good stability, low cost, simple preparation steps, safe and simple operation, easy reaction achieving, little wastewater generation, environmental protection, few side reactions, high reaction selectivity, good atom economy, high product purity and high yield, and is suitable for industrial production.
Owner:XINFA PHARMA

Low-cost simple and convenient preparation method of 3-amino-4-methylpyridine

The invention relates to a low-cost simple and convenient preparation method of 3-amino-4-methylpyridine. The method comprises the following steps: performing addition on halogenated crotonaldehyde asa raw material and nitromethane, performing methylenenation condensation, performing aminopyridine cyclization to obtain 4-methyl-3-nitropyridine, and performing reduction to prepare the 3-amino-4-methylpyridine. According to the preparation method provided by the invention, the raw materials used in the method are cheap and easy to obtain, the conditions are mild, the operation is simple, convenient and safe, the reaction selectivity is high, the product yield and purity are high, and the costs are low; and in the process, the atomic economy is high, and three waste (waste water, waste gas and solid waste) is less.
Owner:XINFA PHARMA

Solvent-free coupling synthesis process of disperse blue 360

The invention discloses a solvent-free coupling synthesis process of disperse blue 360. The process comprises the following steps: adding 2-amino-5-nitrothiazole into an organic acid medium, controlling the temperature, dropwise adding nitroso-sulfuric acid and carrying out a diazotization reaction to obtain a diazonium solution; adding N, N-diethyl m-methylaniline into a coupling reactor to carryout solventless reaction, cooling to -10 to 10 DEG C, adding the diazonium solution to carry out coupling reaction until the coupling is finished, filtering and washing to obtain a crude product; andobtaining a high-purity fine blue crystal, namely the disperse blue 360 through a crystal transformation process. According to the solvent-free coupling synthesis process of disperse blue 360, pure disperse blue 360 crystals can be obtained, the yield is high, the produced organic acid and crystal transformation solvent can be completely recycled, energy is saved, waste is reduced, the productioncost is greatly reduced, multiple purposes are achieved, and the process has good practical significance for achieving large-scale clean production.
Owner:JIANGSU HANSYN PHARMA

Simple preparation method of vemurafenib and analogues thereof

The invention provides a simple preparation method of vemurafenib and analogues thereof. The method includes: subjecting para-substituted phenylacetaldehyde II and N-[2, 4-disubstituted-3-(cyanopropionyl)phenyl]n-propanesulfonamide III to azeotropic dewatering and condensation reaction under alkaili catalysis, condensing the obtained condensation product and the methylenation reagent V(N, N-dimethylformamide or tri-orthoformate), and then performing cyclization with ammonia to obtain vemurafenib or analogues thereof. The method for preparation of vemurafenib provided by the invention has the characteristics of low cost, mild process conditions, low operation requirements, short reaction time, high production efficiency, simple process operation, little waste water production, green and environmental protection, high yield and purity, and is beneficial to green industrial production of vemurafenib. At the same time, the method provided by the invention can prepare vemurafenib analogues,and is of important significance for the drug efficacy study of similar compounds.
Owner:XINFA PHARMA

Preparation method of pyridine derivative

The invention relates to a preparation method of pyridine derivatives, which comprises the following steps: by using piperidine-4-ketone hydrochloride as a raw material, carrying out halogenation reaction and elimination reaction to obtain a series of pyridine derivatives. Piperidine-4-ketone hydrochloride and a specific amount of a halogenation reagent are subjected to a halogenation reaction torespectively prepare 3,5-dihalogenated piperidine-4-one, 3,3,5-trihalogenated piperidine-4-one, or 3,3,5,5-tetrahalogenated piperidine-4-one; then performing elimination reaction on the raw materialsand different types of alkaline reagents to obtain pyridine derivatives of which the 4-positions are hydroxyl, amino or dimethylamino groups respectively. The method is simple and convenient to operate, mild in condition, short in technological process, low in wastewater amount, environmentally friendly and low in cost, and green industrial production of the pyridine derivative is facilitated.
Owner:XINFA PHARMA

Preparation method of low-cost 3-hydroxypyridine

The invention relates to a preparation method of low-cost 3-hydroxypyridine. The method comprises the steps of enabling 4-benzylaminobutyrate hydrochloride and 2-haloacetate to be subjected to a substitution reaction so as to obtain N-benzyl-3-aza-1, 7-pimelate diester; then, enabling the N-benzyl-3-aza-1, 7-pimelate diester to be subjected to an intramolecular condensation reaction, and carrying out hydrolytic decarboxylation to obtain N-benzylpiperidin-3-one; then, carrying out catalytic hydrogenolysis to remove benzyl so as to obtain piperidin-3-one; enabling the piperidin-3-one and halogen to be subjected to a halogenating reaction so as to obtain 2, 4-dihalogenated piperidine-3-one; then, enabling the 2, 4-dihalogenated piperidine-3-one and an acid-binding agent to be subjected to an elimination reaction to obtain 3-hydroxypyridine. The raw materials used in the preparation method are low in price and easy to obtain, the operation conditions are mild, simple and convenient, and less wastewater is produced; the method is high in operation safety, environmental protection property, product yield and purity, and low in cost.
Owner:XINFA PHARMA

Green production method of low-cost lenalidomide

The invention relates to a green production method of low-cost lenalidomide. According to the method, in presence of a solvent and an alkali, 3-aminopiperidine-2,6-dione and 1-halo-acetoacetate are subjected to dehydrogenation halogen acid condensation, dealcoholizing amidation, 2-halo-4-nitrobutanal dehydration and dehydrochlorination or dehydrobromination, 3-(7-nitro-3-oxo-1H-isoindol-2-yl)piperidine-2,6-dione is obtained, the process is completed with a one-pot method, nitro is reduced into amino by catalytic hydrogenation of 3-(7-nitro-3-oxo-1H-isoindol-2-yl)piperidine-2,6-dione, and lenalidomide is prepared. The method has the advantages of cheap and easily available raw materials, short technological process, simple operation and environmental protection and is a production method beneficial to industrialization.
Owner:XINFA PHARMA

Anlotinib hydrochloride intermediate and preparation method of anlotinib hydrochloride

The invention provides an anlotinib hydrochloride intermediate and a preparation method of anlotinib hydrochloride. 4-hydroxy-6-methoxyl-7-GO substituted quinolone and 2-fluorine-3-halogenate-6-bitrotoluene are used for generating 4-(2-fluorine-3-methyl-4- nitrobenzophenone)epoxide-6-methoxyl-7-GO substituted quinolone under action of an acid-binding agent through substitution reaction, and then condensation reaction is conducted with triglyceride orthoacetate to obtain 4-[2-fluorine-3-(2-alkyloxyethyl-propylene-1-base)-4-nitrobenzophenone]epoxide-6-methoxyl-7-GO substituted quinolone, and then under existing of a catalyst, reduction-cyclization reaction is conducted to obtain the anlotinib hydrochloride intermediate. The obtained anlotinib hydrochloride intermediate can be used for preparing the anlotinib hydrochloride according to the prior art or the preparation method of the anlotinib hydrochloride. According to the anlotinib hydrochloride intermediate and the preparation method ofthe anlotinib hydrochloride, raw materials are cheap and easy to obtain, the technology process is simple and short, operation is easy and convenient, safety and environmental protection are achieved, the cost is low, and selectivity, the yield coefficient and the purity are high.
Owner:XINFA PHARMA

Simple 2-amino-5-halogenated pyridine preparation method

The invention provides a 2-amino-5-halogenated pyridine preparation method, which comprises: carrying out an addition reaction on 4-cyano-1-butyne and a halogen element X2 in a solvent under the catalysis of an acidic catalyst to obtain 4,4,5,5-tetrahalogenated n-valeronitrile, and carrying out cyclization on the 4,4,5,5-tetrahalogenated n-valeronitrile and ammonia through pyridine to obtain 2-amino-5-halogenated pyridine. According to the present invention, the preparation method has advantages of mild preparation condition, safety, environmental protection, low cost, high selectivity, less by-products and high product yield, and is suitable for industrial production.
Owner:XINFA PHARMA

Preparation method of halofantrine hydrochloride

The invention provides a preparation method of halofantrine hydrochloride. The method comprises the following steps: generating corresponding acyl chloride from 4-trifluoromethyl-2-(3, 5-dichlorophenyl) phenylacetic acid and an acylating chlorination reagent, carrying out Friedel-Crafts reaction cyclization, performing condensation with N, N-di-n-butyl-beta-aminopropionate, and finally, carrying out reduction, aromatization and salification to obtain the halofantralin hydrochloride. The method has the advantages of cheap and accessible raw materials and low cost; reaction conditions are easy to realize, the technological process and operation are safe, simple and convenient, less wastewater is generated, and environmental friendliness is achieved; and the intermediate is good in stability,the reaction activity and selectivity are high, there are fewer side reactions, and the prepared halofantrine hydrochloride is few in impurity, high in purity and high in yield.
Owner:XINFA PHARMA

A kind of convenient preparation method of 2-amino-5-halopyridine

The invention provides a 2-amino-5-halogenated pyridine preparation method, which comprises: carrying out an addition reaction on 4-cyano-1-butyne and a halogen element X2 in a solvent under the catalysis of an acidic catalyst to obtain 4,4,5,5-tetrahalogenated n-valeronitrile, and carrying out cyclization on the 4,4,5,5-tetrahalogenated n-valeronitrile and ammonia through pyridine to obtain 2-amino-5-halogenated pyridine. According to the present invention, the preparation method has advantages of mild preparation condition, safety, environmental protection, low cost, high selectivity, less by-products and high product yield, and is suitable for industrial production.
Owner:XINFA PHARMA
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