56results about How to "New route" patented technology

The invention discloses a quinoid chalcone compound with an isopentenyl group at an A ring, and a preparation method and anti-inflammatory activity thereof. The compound has a structure as shown in a general formula (I) which is described in the specification. The preparation method comprises the following steps: (1) synthesizing 3,5-dihydroxy-2-acetyl-6,6-diisopentenylcyclohexyl-2,4-dienone; (2) synthesizing 3-hydroxy-5-methoxy-2-acetyl-6,6-diisopentenylcyclohexyl-2,4-dienone; (3) synthesizing a methoxy group protected quinoid chalcone compound with the isopentenyl group at the A ring; and (4) synthesizing the quinoid chalcone compound with the isopentenyl group at the A ring. The compound is simple to prepare and has obvious anti-inflammatory action.

The invention provides a new preparation method of drug Pranlukast for treating asthma. The new preparation method includes the specific steps that with 2-aminophenol-4-sulfonic acid as a starting material, a key intermediate 3-amino-2-hydroxyacetophenone is prepared by means of acylation, Fries rearrangement and deprotection, then reacts with 4-(phenylbutoxy)benzoic acid, and then is subjected to condensation with ethyl 1H-tetrazole-5-acetate, and finally preparation is achieved through ring closing under the acidic condition. Compared with the prior art, the raw material used for the new preparation method is low in price and easy to obtain, industrialization of a process can be achieved easily, and the obtained final product is high in purity; and no dangerous process exists, equipment is simple, and the route is novel.

The invention relates to a method for preparing a tapentadolhydrochloride and an intermediate thereof, in particular to a compound shown in a structural formula II, an enantiomer, a diastereoisomer and a raceme of the compound, a mixture of the enantiomer and the diastereoisomer and salts thereof, a method for preparing a compound shown in the formula II, application of the compound shown in the formula II in preparation of the tapentadolhydrochloride, and an intermediate for preparing the compound shown in the formula II. The method for preparing the tapentadolhydrochloride has the advantages of mild condition, simplicity of operation, high stereoselectivity, security, environment friendliness, suitability for large-scale commercial production, and abundant and low-cost raw material and catalyst.

The invention provides a 3-droperidol derivative represented by a structural formula (I), wherein R is hydrogen, C1-C6 alkyl, aryl, benzyl, or a structure as the formula; R1 is hydrogen, C1-C18 alkyl, aryl, benzyl or hydroxymethyl; R2 is C1-C6 alkyl, aryl, benzyl or alkoxy; substitution positions of R2 on a benzene ring are 2-, 3-, 4-, 5-, 6- sites or a plurality of sites; and the previous groups are not substituted or substituted by one or more substituents selected from alkyl, alkyl halide, hydroxyalkyl, halogen, alkoxy, or hydroxyl. The invention also provides a preparation method of the 3-droperidol derivative. The preparation method is novel, the raw materials and the reagents are cheap, the reaction conditions are mild, and the operations are easy. With the method, produced 1-substituent-3-droperidol can be used as an important intermediate in novel medicine developing.

The invention discloses a preparation method for a polyfluoromethylpyrazole compound, and an intermediate of the compound and a preparation method thereof. The invention provides a preparation method for a compound 1 as defined in the specification. The preparation method comprises a step of subjecting a compound 2 as defined in the specification and methylhydrazine to a ring-closure reaction in an organic solvent so as to obtain the compound 1, wherein R<1> is a C1-4 alkyl group, R<2> is a methyl or ethyl group and x is 2 or 3. The preparation method provided by the invention uses cheap and easily available raw materials and is mild in reaction conditions, safe to operate, environment friendly, low in production cost, high in reaction conversion rate, low in the content of isomer in by-products, high in reaction yield and product purity and suitable for industrial production.

The present invention relates to the new synthesis process of sultopride hydrochloride. The synthesis process includes the following steps: 1. the reaction between 2-methoxy-5-ethanesulbonyl benzoic acid and methanol to produce 2-methoxy-5-ethanesulbonyl methyl benzoate; 2. the reaction between 2-methoxy-5-ethanesulbonyl methyl benzoate obtained in the step 1 and N-ethyl-2-aminomethyl tetrahydropirrolidine to produce sultopride; and 3. the reaction between sultopride and hydrochloric acid to obtain sultopride hydrochloride.

The invention discloses a synthesizing method of orthoxenol with amino benzenes compound, which comprises the following steps: choosing amino benzenes compound as raw material; diazotizing; coupling; generating diphenyl compound; hydrolyzing; getting the orthoxenol. This invention possesses simple operation, low cost and high receiving ratio, which adopts a new route to proceed.

The invention provides a new strain-Rhodococcus sp. ZJPH1003 and an application thereof in preparing S-(+)-2,2-dimethylcyclopropane carboxylic acid through microbial catalytic asymmetric hydrolysis of 2,2-dimethylcyclopropane ethyl formate. The strain is conserved at China Center for Type Culture Collection, the conservation address is Wuhan University, Wuhan, China, postcode 430072, the conservation number is CCTCC M 2010371, and the conservation date is December 29, 2010. In the invention, the adopted method for preparing the S-(+)-2,2-dimethylcyclopropane carboxylic acid through microbial catalytic asymmetric hydrolysis of the 2,2-dimethylcyclopropane ethyl formate by utilizing the new microbial strain has the advantages of novel route, high yield, environmental friendliness and the like; and by utilizing a chiral biocatalysis method which takes a Rhodococcus ZJPH1003 cell as a catalyst, for the target product-S-(+)-2,2-dimethylcyclopropane carboxylic acid, the e.e can reach 82.5% and the yield can reach 41.3% when the substrate concentration is 30mmol/L.

The invention provides a process for preparing 6- hydroxyl-2- naphthoic acid, which comprises the steps of: reacting compound of formula (I) with halogens under alkaline condition at 0-100 deg C for 7-12hr to obtain compound of formula (II), then reacting compound of formula (II) with HX in acetic acid solution at 70 deg C to backflow temperature to obtain compound of formula (III). The invention can realize high purity and high yield.

The invention discloses a preparation method of a larotinib intermediate represented by V, and an intermediate compound. The method comprises the following steps: taking 2,5-difluorobromobenzene and N-tert-butoxycarbonyl-L-pyroglutamate as initial raw materials, and carrying out coupling, deprotection group cyclization, reduction and decarboxylation to obtain a compound represented by a formula V.According to the invention, the preparation method has the advantages of novelty, low cost, cheap and easily available raw materials and high yield, and is suitable for large-scale industrial production.

The invention provides a preparation method of 2-(2-chloro-3-chloromethyl-4-methylsulfonyl benzoyl)-1,3-cyclohexanedione. The preparation method comprises the following steps that 2-chloro-3-bromomethyl-4-methylsulfonyl benzoic acid is taken as a raw material, through chlorination, acyl chlorination and 1,3-cyclohexanedione substitution and rearrangement reaction, and the 2-(2-chloro-3-chloromethyl-4-methylsulfonyl benzoyl)-1,3-cyclohexanedione is obtained. According to the preparation method, the new synthesis method is provided, the final yield can reach more than 90%, the HPLC detection content can reach more than 99%, purity is high, and the preparation method can be used as a reference substance, is conducive to development of the analysis method of tembotrions, more beneficial to quality control of tembotrions products, and provides a new thinking for the quality control of the products.

The invention discloses a preparation method of a sofosbuvir key intermediate ((2R,3R,4R,5R)-3-(benzoyloxy)-5-chloro-4-fluoro-4-methyltetrahydrofuran-2-yl)benzoic acid methyl ester. The preparation method comprises the following steps: by using (R)-2,2-dimethyl-1,3-dioxolane-4-carboxylic acid as a starting material, performing acylating chlorination, performing a reaction with alpha-fluoropropionic acid, performing carbonyl reduction, performing hydroxyl protection, performing hydrolytic cyclization, performing hydroxymethyl protection, performing reduction, and performing chlorination to prepare the sofosbuvir key intermediate ((2R,3R,4R,5R)-3-(benzoyloxy)-5-chloro-4-fluoro-4-methyltetrahydrofuran-2-yl)benzoic acid methyl ester. The preparation scheme has a short synthetic route and a high yield, and avoids a fluorination reaction step in the synthetic process.

The invention discloses a novel synthetic method for preparing a chiral intermediate of niraparib. The method comprises the following steps: taking 4-bromophenylacetic acid and chiral substituted oxazolone as starting materials; and carrying out amide condensation, Michael addition, hydrolysis, reduction and intramolecular cyclization to obtain the intermediate (VII). The preparation method is low in cost, raw materials are easily obtained, the yield is high, and the synthetic method is suitable for industrialized production.

The invention discloses a preparation method of ketoprofen. The method takes m-bromobenzoic acid and benzene as starting raw materials, and the ketoprofen is prepared through the steps of acylating, protecting a carbonyl group, taking a Grignard reagent, reacting with propylene oxide, oxidizing, de-protecting and the like. The method disclosed by the invention has the characteristics of short reaction route, easiness of obtaining the raw materials, high yield and low cost.

The invention discloses a preparation method of m-cyanomethyl methyl benzoate. According to the method, m-bromobenzoic acid is used as a starting raw material; the m-bromine methyl methyl benzoate is prepared through esterification; m-methoxy formyl phenethyl alcohol is obtained and prepared through Grignard reaction; through oxidization, the m-methoxy formyl phenylacetic acid is prepared; through amidation and dewatering, the m-cyanomethyl methyl benzoate is finally prepared. The preparation method provided by the invention has the advantages that the design is ingenious; the route is novel; the raw materials have low price and can be easily obtained; the process is simple; the implementation is easy; the yield is high; the purity of the obtained final product is high; the quality is high; no dangerous process exists; the extremely toxic substances of cyanides and expensive cyaniding reagents used in the conventional synthesis are avoided; the requirements on the equipment are simple; the production difficulty and the production cost investment are reduced; the industrial production can be favorably realized; the economic benefits are good.

The invention provides a preparation method of an anti-hypertensive drug. Specifically the invention provides a novel intermediate: 2-ethoxy-1-{[2'-(5-carbonyl-4,5-dihydro-1,2,4-oxadiazole-3-yl)biphenyl-4-yl]methyl}-1H-benzoimidazole-7-carboxylic acid (Azilsartan). The intermediate is represented by the formula A, wherein in the formula the X represents an H atom or a halogen atom. The Azilsartan can be rapidly and conveniently prepared through the prepared intermediate represented by the formula A. Moreover, the preparation method has the advantages of short reaction route, less by products, high total yield, and mild conditions, and is suitable for industrial production of Azilsartan.

The invention relates to a preparation method of 4-(4-phenylbutoxy) benzoic acid, which specifically comprises the following steps: a, performing a reaction on gamma-chlorobutanone with p-hydroxybenzoate under the catalysis of alkali to generate a compound 3; b, performing catalytic reduction on the compound 2 to generate a compound 4; and c, hydrolyzing the compound 4 to obtain the 4-(4-phenylbutoxy) benzoic acid. According to the preparation method of the 4-(4-phenylbutoxy) benzoic acid, the adopted raw materials are low in price and easy to obtain; the method has the advantages of short synthetic route, novel route, no pollution and high yield.

The invention discloses a novel synthesis method for preparing a chiral intermediate of omarigliptin. The method disclosed by the invention comprises the following steps: taking crotonyl chloride and (S)-4-benzyl-2-oxazolidone as starting raw materials and carrying out amidation, alder condensation, hydrolysis, Curtius rearrangement, Boc addition and ring opening to obtain the chiral intermediate (VI). The preparation method disclosed by the invention has the advantages of relatively short route, relatively low cost, easiness for obtaining the raw materials and relatively high yield so that the preparation method is suitable for industrial production. A formula is shown in the description.