148 results about "P-hydroxyphenylglycine" patented technology

The invention discloses a method for recycling active ingredients in the amoxicillin mother liquor synthesized by an enzymatic method. The method includes synthesizing the amoxicillin mother liquor by the enzymatic method; separating the amoxicillin mother liquor through a macro-porous resin column, eluting the separated amoxicillin mother liquor by deionized water, and collecting an eluant rich in D-4-Hydroxyphenylglycine and an eluant rich in 6-amino penicillanic acid (APA) respectively; filtering the eluant rich in D-4-Hydroxyphenylglycine with Daltonian ultrafiltration membranes with a cutoff molecular weight of 150 to 200; performing nanofiltration concentration on the Daltonian ultrafiltration membranes for the filtered liquor with the cutoff molecular weight of 150 to 200, and standing, crystallizing and filtering the concentrated liquor to obtain solids, and drying the solids to obtain the D-4-Hydroxyphenylglycine. According to the method, the technological design is reasonable, the operation is convenient, the recycling effect is good, and energy is saved and the environment is protected.

This invention relates to a preparation method of D - para hydroxybenzene glycine. It takes (+) - 3 - bromo-camphor ammonium sulphonate salt as resolution agent, under protection of 2 - nitryl - benzaldehyde and N2, split raceme para hydroxybenzene glycine to obtain D -glycine.

The invention provides a preparation method of D-para hydroxybenzene glycine methyl ester. The method comprises the following steps of: firstly, preparing a hydrochloric acid methanol solution; adding D-para hydroxybenzene glycine into the hydrochloric acid methanol solution to perform reflux reaction for 2-4 hours at 65-80 DEG C; performing pressure reduction distillation and removing methanol; and adding water to obtain a D-para hydroxybenzene glycine methyl ester aqueous solution. Based on that, the invention also provides anenzymatic synthesis method of amoxicillin. The method comprises the following steps of: adding 6-APA and immobilized penicillin acylase into the D-para hydroxybenzene glycine methyl ester aqueous solution to react for 1-8 hours at 10-30 DEG C; regulating the pH value of a reaction liquid to 0.8-1.0 by using hydrochloric acid or sulfuric acid aqueous solution; regulating the pH value to 4.5-6.0 by using ammonia water or sodium hydroxide aqueous solution to crystallize for 1-5 hours at 0-30 DEG C; separating solid from liquid; collecting a solid; and washing and drying to obtain amoxicillin. The method is simple in steps, and low in cost; and the obtained -para hydroxybenzene glycine methyl ester is high in yield and less in impurities and can be directly applied to anenzymatic synthesis of amoxicillin.

The invention belongs to the technical field of medicinal and chemical intermediate production, and relates to a method for synthesizing p-hydroxyphenylglycine. The method comprises the following steps of: adding catalyst in a ratio of phenol to glyoxylic acid of 0.9 to 2 at one time at the temperature of between 35 and 75 DEG C, and reacting for 5 to 20 hours; adding a small amount of reductive substance for decolorization, adjusting the pH value by using alkali, and crystallizing for 1 to 10 hours at the temperature of between 0 and 40 DEG C; and washing the crystal by using a large amount of water, and then flushing the crystal by using an organic solvent. The method has simple process and low cost, the yield can reach 60 percent, and the color and the purity cannot meet the resolution requirements.

The invention belongs to the technical field of pharmacy and relates to a recovery method for D-hydroxyphenylglycine in amoxicillin crystallization mother liquor of enzymatic synthesis. The recovery method comprises the following steps that 1, amoxicillin crystallization mother liquor is decomposed; 2, electrodialysis, ultra-filtration and reverse osmosis are adopted for preparing a D-hydroxyphenylglycine concentrated solution; 3, D-hydroxyphenylglycine is crystallized. According to the method, the product quality of recovered D-hydroxyphenylglycine is promoted, efficient concentration of D-hydroxyphenylglycine in the mother liquor is achieved, and therefore the yield of recovered D-hydroxyphenylglycine products is greatly increased; a brand-new technology is used for recovering D-hydroxyphenylglycine in the mother liquor successfully, new economic benefits can be increased, and the recovery method plays an important role in environmental protection.

The invention relates to a method of synthesizing cefadroxil by an enzyme process. The method comprises the following steps of: by taking 7-ADCA as an initial raw material, performing a reaction on D-tyrosine methyl ester or D-p-hydroxyl phenylglycine ethyl ester and 7-ADCA in water by directly inputting the solid in the presence of penicillin acylase at 10-25 DEG C; after reaction, separating a cefadroxil coarse product and enzyme reaction mother liquor; further purifying the cefadroxil coarse product to obtain a white cefadroxil product; and adding beta-naphthol or 2,7-dioxynaphthalene into the enzyme reaction mother liquor to obtain a cefadroxil compound. Cefadroxil can be further treated and recovered from the cefadroxil compound, so that the recovery rate of cefadroxil is increased. The product obtained by the method is high in yield and purity. The product is white in appearance, multi-step reaction of a chemical process and various solvents and auxiliary materials are not needed, and green synthesis of cefadroxil is realized.

The invention provides a novel route cefprozil compound, which simplifies the processes of 7-phenylacetamide-3-chloromethyl cephalosporanic acid anisyl acetate and triphenylphosphine phyllocaline Benedict's reagents, and activating reagents such as sodium iodide and the like do not need to be added, so the post treatment is simple and convenient, the production amplification can be realized more easily, and at the same time, para hydroxybenzene glycine is adopted to react with 2, 4, 6-trichlorophenol to generate a novel intermediate product of para hydroxybenzene glycine 2, 4, 6- phenyl ester trichlorine. The stability and the activity of the compound are mild, by-products produced in the reaction are fewer, the reaction yield is improved, and in addition, the obtained products have high purity and low isomeride content.

The invention discloses a synthesis method of p-hydroxyphenylglycine methyl ester. The method comprises the steps of: reacting p-hydroxyphenylglycine or salt thereof which is used as an initial raw material with methanol in the presence of solid acid; and treating so as to obtain p-hydroxyphenylglycine methyl ester. The preparation method of p-hydroxyphenylglycine methyl ester is available in raw material, simple and convenient to operate, low in cost, high in yield, high in product purity, and is suitable for commercial production.

The invention discloses a penicillin G acylase mutant, and coding gene and application thereof; the amino acid sequence of the penicillin G acylase mutant is displayed by SE Q ID NO.1; the nucleotide sequence of the coding gene is presented by the SEQ ID NO.2; the invention also provides the application of the penicillin G acylase mutant in synthesis of cephalo-type antibiotic. Compared with wild type, the novel penicillin G acylase mutant has higher activity in synthesis of the cephalo-type antibiotic like cephalosporin propylene, cofactor or cephalosporin amoxicillin, and has highly improved enzyme vitality when catalyzing 7-APRA and side chain 2-hydroxy ethyl to react with hydroxy benzenes glycine ester so as to synthesis the cephalosporin propylene; specific vitality is improved from 1.5U/mg to 35U/mg, and synthesis hydrolysis vitality ratio is not reduced, and the synthesis hydrolysis vitality ratio can reach 1.8.

The invention relates to a splitting process of racemic para hydroxybenzene glycine. As to the problems that the splitting process of the racemic para hydroxybenzene glycine is high in price, much high-concentration waste water is generated in a production process, and pollution on the environment is easily generated at present, the splitting process of the racemic para hydroxybenzene glycine is characterized by comprising the steps of: dispersing 1mol of complex salt prepared from L-p-hydroxyphenylglycine glycine and D-ethyl benzene sulfonic acid into 20mol of water by a hydrolysis process, and slowly dropping inorganic base solution to neutralize until the pH is 4-8; devitrifying, separating, washing and drying the solution to obtain the L-p-hydroxyphenylglycine glycine, storing the mother liquid for use at low temperature; dissolving 1mol of 98% concentrated sulfuric acid into 20mol of water by the splitting process, adding racemic para hydroxybenzene glycine and the mother liquor, then adding 0.05mol of catalyst to reflux for 10-20 hours; devitrifying, separating, washing and drying the solution to obtain the complex salt of the L-p-hydroxyphenylglycine glycine and D-ethyl benzene sulfonic acid, and applying the hydrolysis process and splitting process in circulation until the concentration of inorganic salt of the mother liquid is saturated. According to the invention, racemization and splitting integration is achieved; and the conversion per pass is kept over 80%, and the reaction efficiency is high.

The invention discloses a p-hydroxy phenylglycine synthesis method. P-hydroxy phenylglycine is obtained by carrying out reaction of phenol and 2-hydroxy glycine in the presence of catalysts. The p-hydroxy phenylglycine synthesis method is available in raw materials, simple and convenient to operate, low in cost, high in yield and product purity, environment-friendly and suitable for commercialized production.

The invention discloses a method for recovering D-p-hydroxyphenylglycine in amoxicillin production waste liquid by use of ion exchange resin. The method comprises the following steps: firstly, exchanging D-p-hydroxyphenylglycine onto the resin by use of the ion exchange resin, dissolving D-p-hydroxyphenylglycin by use of a 0.5mol/L aqueous hydrochloric acid solution, and meanwhile, concentrating the solution; secondly, purifying the desorption solution by use of macroporous adsorption resin, and drying the dripping liquid to obtain a finished product. The method is characterized in that D-p-hydroxyphenylglycine is concentrated and purified by use of the ion exchange resin, the process is greatly simplified, the recovery effect is good, the energy is saved, the environment can be protected, and the subsequent production process of synthesizing amoxicillin by use of an enzyme method is further perfected.

The invention discloses four mutants of D-carbamoyl hydrolase and application to manufacture D-p-hydroxybenzene glycine in the biological engineering domain, which is characterized by the following: mutating the amino acid at 18th position of mutation enzyme 1 from alanine into threonine and tyrosine at 30th position of mutation enzyme 2 to asparagine; switching the lysine at 30th of mutation enzyme 2 into glutacid; overlapping three mutation positions; obtaining the mutation enzyme 4.

The present invention relates to medicine material production, and is especially inhomogeneous enzyme catalytic process for producing D-p-hydroxyphenyl glycine. After solvent and DL-p-hydroxyphenyl hydantoin in the amount of 4-28 vol% of the solvent are added into enzyme catalyzed reactor, enzyme preparation of activity higher than 0.3 U/ml in the amount of 1-12 % total reactant liquid is added to react at pH 6.2-8.6 and 30-44 deg.c through stirring for 6-12 hr to separate out D-p-hydroxyphenyl glycine crystal until the concentration of N-carbamino-p-hydroxyphenyl glycine inside the reaction system is lowered to below 0.25 wt%. During the reaction, the reaction system is sampled and detected by means of high pressure liquid chromatography. The present invention has the advantages of high yield, low power consumption, high product quality, etc.

The invention relates to a method for synthesizing cefprozil through a green enzymatic method. The method includes following steps: S1, adding parent nucleus 7-APRA or hydrochloride thereof into a buffer solution, and adding D-para hydroxybenzene glycinate derivative and/or D-para hydroxybenzene glycine amide under the condition that pH is 5-8; S2, adding cefprozil synthetase into the S1, reacting at temperature of 15-30 DEG C and pH of 6.5-7.8 for 1-3h, separating out separation liquid after reaction finishes, and immobilizing cefprozil synthetase to obtain a cefprozil crude product; S3, subjecting the crude product obtained in the S2 to acidolysis dissolved clarification, filtering and re-crystallizing to obtain cefprozil. Raw materials are cheap and easy to obtain, reaction is simple, hydrolysis activity of penicillin acylase can be effectively inhibited, and production cost is low; compared with conventional chemical synthesis methods, the method is simple and convenient to operate and low in cost, synthesis period is shortened, production efficiency is improved, total yield is high, controllability is high, and needs on industrial production are met.

The invention relates to a preparation method of D-p-hydroxyphenylglycine methyl ester. The preparation method comprises the following steps: (1) esterifying: carrying out an esterification reaction on D-p-hydroxyphenylglycine and methanol to obtain D-p-hydroxyphenylglycine methyl ester sulfate, and distilling off methanol and water under reduced pressure, wherein the D-p-hydroxyphenylglycine is added one time, and the methanol is added in batches; and (2) crystallizing the D-p-hydroxyphenylglycine methyl ester. The preparation method can very easily control the reaction endpoint, so that theyield and the quality index of the finished product can be guaranteed to the maximum extent; the preparation method provided by the invention avoids the problems of safety and operation caused by hydrogen chloride gas or thionyl chloride; and in the step of D-p-hydroxyphenylglycine methyl ester crystallization, an alkali metal hydroxide is used for adjusting the pH value of the system without using ammonia water, so that the problem that ammonia ions are difficult to treat is avoided.

The invention relates to a synthesis method of medicines, and particularly relates to screening of an immobilized Amoxicillin synthase and an enzymatic synthesis process of Amoxicillin. The process includes immobilizing by adoption of an amino epoxy type carrier to obtain an immobilized Amoxicillin enzyme LK218, adding the immobilized Amoxicillin enzyme LK218, 6-aminopenicilanic acid and a D-p-hydroxyphenylglycine derivative into water, stirring, mixing to obtain a mixture, adjusting the pH value of the mixture by utilization of a hydrochloric acid solution and a sodium hydroxide solution, controlling the temperature and reaction time of the mixture, and finishing the reaction until the residual concentration of the 6-APA is 0-2 mg/mL. Aiming at problems, namely difficult screening and evaluation of immobilized enzymes, tedious production steps, poor reference points, long reaction time, low conversion ratios, and the like, the immobilized Amoxicillin enzyme and the novel synthesis process of the Amoxicillin are provided.

The invention relates to a green method of enzymatic synthesis of cefaclor. The method includes the steps of: (S1) adding a parent nucleus 7-ACCA into a buffer liquid; (S2) under the pH of 5-8, adding a D-p-hydroxyphenylglycinate derivative or a salt thereof and/or D-p-hydroxyphenylglycine amide, and immobilized cefaclor synthesis enzyme, and performing a reaction for 1-3 h at 5-30 DEG C under the pH value of 6.2-7.8; after a certain reaction time, adding a seed crystal to perform crystallization, and when the reaction is finished, separating a reaction liquid and the immobilized cefaclor synthesis enzyme to obtain a cefaclor coarse product; and (S3) acid-hydrolyzing and dissolve-clarifying the coarse product, filtering and re-crystallizing the product to prepare the cefaclor. The enzymatic synthesis method, compared with a conventional chemical synthesis method, is simple in operation, is low in cost, reduces synthetic period, improves production efficiency and total yield, has strong controllability and satisfies industrial production.

The invention discloses a method for separating p-hydroxyphenylglycine and ammonium sulfate from a glycine mother solution, which is characterized by comprising the following steps: regulating the pH value of a glycine mother solution containing p-hydroxyphenylglycine and ammonium sulfate to 3.0-8.0, sending into a continuous chromatographic separation system filled with a strong acid cation exchange resin at 10-80 DEG C, eluting by using water as an eluting agent, and respectively collecting an eluate and a residue solution to obtain the two products p-hydroxyphenylglycine and ammonium sulfate, thereby implementing efficient separation of the p-hydroxyphenylglycine and ammonium sulfate. The method has the advantages of compact equipment, simplified system, reduced pipelines and smaller occupied area; the method is continuously operated under continuous operation, the composition and concentration of the product are basically kept stable; the method has favorable operating flexibility, and can automatically regulate the rotation speed according to the variance in production load; the method lowers the operating cost and equipment investment; and the separating effect is good, and the purity of the separated p-hydroxyphenylglycine is high.