136 results about "Cephalosporin Antibiotic" patented technology

The present invention provides novel thioester derivatives of thiazolyl acetic acid of the general formula (I),wherein, R1 represents H, trityl, CH3, or CRaRbCOOR3, in which Ra and Rb, independently of one another, represents hydrogen or methyl and R3 represents H or C1-C7 alkyl; and R2 represents C1-C4 alkyl or phenyl. The invention also provides a method for preparation of the thioester derivatives and reaction of the thioester derivatives with cephem carboxylic acids to produce cephalosporin antibiotic compounds having general formula (II),wherein, R1 represents H, trityl, CH3, or CRaRbCOOR3, in which Ra and Rb, independently of one another, represents hydrogen or methyl and R3 represents H or C1-C7 alkyl; R4 is CH3, -CH=CH2, CH2OCH3, CH2OCOCH3,and R5 is H or a salt or a carboxylic protecting group, comprising,acylating a compound of formula (III),wherein, R4 and R5 are defined as above, and R6 is H or trimethylsilyl;with a compound of formula (I).

PCT No. PCT/KR96/00250 Sec. 371 Date May 18, 1998 Sec. 102(e) Date May 18, 1998 PCT Filed Dec. 26, 1996 PCT Pub. No. WO97/24358 PCT Pub. Date Jul. 10, 1997The present invention relates to a novel crystalline cefdinir intermediate having formula (II) which can be used very usefully for preparing a cephalosporin antibiotics, cefdinir, in which Ph represents phenyl, p-TsOH represents p-toluenesulfonic acid, and DMAC represents N,N-dimethylacetamide, to a process for preparation thereof and to a process for preparing cefdinir using the compound of formula (II). According to the present invention, cefdinir can be prepared in an excellent color and purity and with a good yield.

This invention relates to a sustained release pharmaceutical composition comprising at least a cephalosporin antibiotic, a mixture of polymers and other pharmaceutically acceptable excipients; in the composition, polymers are selected from mixture of galactomannans and neutral swellable polymers, which releases the active ingredient in a predetermined manner.

The present invention provides new thioester derivatives of 4-halogeno-2-methoxyimino-3-oxo-butyric acid of the general formula (I), also, the invention provides a method by which the said thioester derivatives can be prepared by reacting 4-halogeno-2-methoxyimino-3-oxo-butyric acid of the general formula (II) with 2-mercapto-5-substituted-1,3,4-oxadiazoles of the general formula (III) in a solvent, in the presence of DMF/POCl3 and in presence of an organic base and if desired the so obtained thioester derivatives so obtained are reacted with 7-amino-cephem carboxylic acids of the general formula (V) to produce condensed products which are insitu reacted with thiourea to get cephalosporin antibiotic compounds having the general formula (VI).

A novel 4-halo-2-oxyimino-3-oxo butyric acid-N,N-dimethyl formiminium chloride chlorosulfate of formula (I) useful in the preparation of cephalosporin antibiotics

wherein

X is chlorine or bromine; R is hydrogen, C_1-4 alkyl group, an easily removable hydroxyl protective group, —CH₂COOR₅, or —C(CH₃)₂COOR₅, wherein R₅ is hydrogen or an easily hydrolysable ester group. The compound of formula (I) is prepared by reacting 4-halo-2-oxyimino-3-oxobutyric acid of formula (IV¹),

wherein X, R and R₅ are as defined above, with N,N-dimethylformiminium chloride chlorosulphate of formula (VII)

in an organic solvent at a temperature ranging from −30° C. to −15° C. The cephalosporins that may be prepared from the intermediate include cefdinir, cefditoren pivoxil, cefepime, cefetamet pivoxil, cefixime, cefmenoxime, cefodizime, cefoselis, cefotaxime, cefpirome, cefpodoxime proxetil, cefquinome, ceftazidime, cefteram pivoxil, ceftiofur, ceftizoxime, ceftriaxone and cefuzonam.

A process for the preparation of cefdinir of the formula (I) the said process comprising the steps of: i) condensing 7-amino-3-cephem-4-carboxylic acid of the formula (XII) wherein R1 is as defined above with compound of the formula (XIII) in the presence of a tertiary amine and an organic solvent, followed by treatment with a base to produce a salt of compound formula (XIV), wherein M+ is a counter ion and ii) hydrolyzing the compound of the formula (XIV) using an acid in the presence of a solvent to produce cefdinir of formula (I).

The invention discloses a concentration detection method for a mixed solution of cephalosporin antibiotics based on Raman spectra. The concentration detection method comprises the following steps: (1) measuring a Raman spectrum of a mixed solution of cephalosporin antibiotics with known concentration; (2) preprocessing the Raman spectrum of the mixed solution of the cephalosporin antibiotics with the known concentration in the step (1); (3) processing the preprocessed Raman spectrum of the mixed solution of the cephalosporin antibiotics in the step (2) by a partial least square method so as to obtain a corrected prediction model; (4) acquiring a Raman spectrum of a mixed solution of to-be-measured cephalosporin antibiotics, and carrying out preprocessing; (5) inputting the Raman spectrum preprocessed in the step (4) into the prediction model so as to obtain the concentration of the mixed solution of the cephalosporin antibiotics. According to the concentration detection method, the concentration of the mixed solution of the multivariable cephalosporin antibiotics is detected by virtue of the Raman spectra. The method is quick and accurate, overcomes the limitations of the prior art effectively, and has important significances on fast food safety inspection and real-time monitoring.

The invention discloses a preparation method of polyvinyl alcohol immobilized acylase. The preparation method comprises the steps: preparing a mixed aqueous solution from polyvinyl alcohol and a cross-linking agent, adding acylase into the mixed aqueous solution of the polyvinyl alcohol and the cross-linking agent, uniformly mixing to obtain an acylase polyvinyl alcohol gel aqueous solution, and carrying out formation and solidification process treatment on the acylase polyvinyl alcohol gel aqueous solution to obtain the polyvinyl alcohol immobilized acylase. The polyvinyl alcohol immobilized acylase is used for synthesizing a cephalosporin antibiotics midbody 7-ACA (Aminocephalosporanic Acid) or 7-ADCA (Aminodesacetoxycephalosporanic Acid). According to the preparation method disclosed by the invention, as PVA (Polyvinyl Alcohol) is used for immobilizing biological enzyme, the enzyme activity recovery rate can reach above 80 percent, immobilized acylase is also more stable and can be reused for above 50 times, so that the application cost of the acylase in the production of the 7-ACA and the 7-ADCA is greatly lowered, and the production efficiency and the product quality are improved.

A process is disclosed for the preparation of 7-amino-3-(2-furanylcarbonylthiomethyl)-3-cephem-4-carboxylic acid of the formula This compound is useful as an intermediate for the preparation of ceftiofur cephalosporin antibiotic used for bovine respiratory infections.

An improved one-pot process for the preparation of Ceftiofur of the formula (I) or its salt, without isolating intermediate compound.

The invention discloses a method for preparing cefquinome sulfate, belonging to the cephalosporin antibiotics special for animals. The method comprises the following: A. a step of preparing 7-amino-cefquinome, during which, iodotrimethylsilane reacts with 5, 6, 7, 8-tetrahydroquinoline, and a reaction product reacts with 7-amino-cephalosporanic acid, thereby obtaining the 7-amino-cefquinome; B. a step of preparing the cefquinome sulfate, during which, the 7-amino-cefquinome reacts with AE active ester after the 7-amino-cefquinome is dissolved and is decolored by sulphuric acid, and the cefquinome sulfate is obtained after the reaction product is subject to extraction, suction filtering, leaching and drying. The method uses 7-ACA which is widely used in industry, is low in cost and is easily obtained as a raw material, without using cefotaxime acid with unstable service quality; meanwhile, the method has a mild reaction condition and simple operation, reduces the dosage of the 5, 6, 7, 8-tetrahydroquinoline which is an important intermediate, and greatly improves the product quality with the yield of 64.1 percent and the purity of 99.7 percent, thereby the method is suitable for industrial production.

The invention discloses a method for preparing cephalosporium acremonium proteome, which comprises the following steps that: cephalosporium acremonium thalli are ground into powder with liquid nitrogen, and then, total protein samples are extracted by a trichloroacetic acid (TCA)-acetone precipitation method; the obtained total protein samples are mixed with hydrated solution, hydration sampling is carried out, immobilized pH gradient (IPG) solid phase rubber strips are adopted, next, isoelectric focusing is carried out, the rubber strips are balanced after the isoelectric focusing completion and are then transferred onto sodium dodecyl sulfonate-polyacrylamide gel electrophoresis (SDS-PAGE) gel, electrophoresis is carried out, the electrophoresis is stopped when bromophenol blue indicators reach the bottom edge, and the gel is obtained; and the transmission scanning is carried out with a gel scanning instrument after the obtained gel is dyed, and the obtained images are analyzed by using software. The cephalosporin C has the important place in the cephalosporin antibiotics production, so the study on the cephalosporium acremonium proteome can be carried out, the foundation is laid for optimizing the molecular breeding and the metabolic engineering of cephalosporin producing strains, and the important significance is realized.

The invention relates to a compound inhalation preparation containing cephalosporin antibiotic and glucocorticoid and applications thereof. The cephalosporin antibiotic is made into an inhalation dosage form, so that the preparation can treat pulmonary bacterial infection with less dosage form and has a certain curative effect on asthma and chronic obstructive pneumonia at the same time.

The invention provides a detection method for antibiotic resistance genes. The method can simultaneously detect the presence or level of multiple antibiotic resistance genes (such as KPC and other genes capable of causing bacterial drug resistance to carbapenem antibiotics, CTX-M and other genes capable of causing drug resistance to beta-lactam antibiotics, AAC and other genes capable of causing drug resistance to cephalosporin antibiotics, and drug resistance genes capable of causing bacterial drug resistance to other types of antibiotics) in nucleic acid molecules in samples. A probe set anda kit including the probe set of one or more kinds are also provided. The probe set and kit can be used for implementing the method. In addition, the kit is also provided; the kit can simultaneouslydetect the presence or level of the multiple antibiotic resistance genes (such as KPC and other genes capable of causing bacterial drug resistance to carbapenem antibiotics, CTX-M and other genes capable of causing drug resistance to beta-lactam antibiotics, AAC and other genes capable of causing drug resistance to cephalosporin antibiotics and the drug resistance genes capable of causing bacterial drug resistance to other types of antibiotics) in the nucleic acid molecules in the samples in a round of reaction.

The invention discloses original-quality ceftriaxone sodium and a pharmaceutical preparation thereof. The key technology and industrialization of the third generation of cephalosporin antibiotics active ester intermediate wins the second prize of National Scientific and Technological Progress Award, and the third generation of cephalosporin antibiotics intermediate AE active ester is a key factor for affecting the internal quality of the ceftriaxone sodium. A preparation method comprises the steps that 1, boron trifluoride-acetonitrile serves as a catalyst, and on the condition that acetonitrile serves as solvent, a triazine ring is reacted with 7-ACA to generate 7-ACT; 2, triethylamine and aminothiazoly loximate are added into the solvent, a chloroformate activator is dropwise added slowly during cooling mixing, the 7-ACT is added for a one-pot reaction after stirring is conducted, and ceftriaxone is obtained; 3, a salt-forming agent is added, and the ceftriaxone sodium is obtained. According to the preparation method, use of a condensing agent with higher price is avoided, the process route is shortened, operation is easy, the reaction condition is mild, the product yield is high, the purity is good, and industrial production is easy.

An improved process for the preparation of ceftriaxone sodium comprising the steps of:

i) reacting the 3-cephem derivative of formula (II)

 with halo acid derivative of formula (III)

 wherein X represents halogen and Y represent halogen in the presence of silylating agent and methylene chloride at −25 to 10° C., to produce (IV),

ii) quenching the reaction by pouring the reaction mixture into water or in a aqueous solution of sodium carbonate, iii) preparing sodium salt solution of (IV) by adding sodium carbonate and separating the organic layer, iv) cyclizing the sodium salt of (IV) in the aqueous solution with thiourea at a temperature in the range of 0 to 30° C., v) adjusting the pH to 1.5 to 2.5 to precipitate the ceftriaxone free acid, vi) converting the ceftriaxone free acid to sodium salt using sodium-2-ethyl hexanoate in water and vii) precipitating and isolating the ceftriaxone sodium.

The invention discloses a specific monoclonal antibody capable of resisting various cephalosporin antibiotics such as ceftiofur, ceftriaxone and the like. The invention further discloses an enzyme-linked immunosorbent assay method and kit for detecting the various cephalosporin antibiotics such as the ceftiofur, the ceftriaxone and the like. According to the invention, the monoclonal antibody is secreted by a hybridoma cell 4D5 of which the preservation number is CCTCC No. C201341. Compared with the prior art, the monoclonal antibody, prepared by the invention, can be used for distinguishing the various cephalosporin antibiotics such as the ceftiofur, the ceftriaxone and the like at the same time. The enzyme-linked immunosorbent assay method and kit disclosed by the invention have the advantages of high detection efficiency, high sensitivity, high precision, high accuracy and the like.

The invention provides a method for preparing an immunity chromatographic test strip for testing cephalosporins antibiotics, and relates to the immunity testing field. The test strip is composed of a sample pad, a combined pad, a cellulose nitrate membrane, a water absorbing pad and a PVC backing; the sample pad, the combined pad, the cellulose nitrate membrane and the water absorbing pad are sequentially stuck to the PVC backing; the combined pad is coated with a group-specific anti-cephalosporins antibiotic antibody colloidal gold label of anti-cephalosporins antibiotics; and the cellulose nitrate membrane is sequentially coated with a cefalexin-OVA test line and a goat anti-rabbit IgG quality control line. The method prepares the test trip by assembling the test preparation of the combination of the group-specific antibody of the anti-cephalosporins antibiotics and the chromogenic colloidal gold, and carries out a multi-residue screening test of the cephalosporins antibiotics with low cost and rapidness; and the portable test strip which can be used for the cephalosporins antibiotic residue tests of different samples is the application of the immunity chromatographic analysis method.

The invention relates to a content determination method of a polymer in a cephalosporin antibiotic drug. The content determination method of the polymer in the cephalosporin antibiotic drug comprisesthe following steps: detecting a test sample solution and a reference solution respectively according to a high-performance liquid chromatography, so as to obtain a chromatogram of the test sample solution and a chromatogram of the reference solution, wherein the test sample solution is a solution containing the cephalosporin antibiotic drug, the reference solution is a diluted solution of the test sample solution and chromatographic conditions are as follows: a mobile phase is a mixed solution of a water solution of ammonium acetate and acetonitrile, and a chromatographic column is a gel chromatographic column; calculating the content of the polymer in the cephalosporin antibiotic drug by adopting a main component self-control method according to the chromatogram of the test sample solution and the chromatogram of the reference solution. An experiment proves that the content determination method has relatively high accuracy in determination of the content of the polymer in the cephalosporin antibiotic drug.

The invention discloses an antibody chip kit for detecting residual cephalosporin antibiotics in food, and belongs to the technical field of the drug residue detection. The kit comprises a chip, an antibody, a second antibody marked by Cy3, and an extraction reagent, the antibody is composed of a cefalexin monoclonal antibody and a ceftiofur monoclonal antibody, and the cefalexin monoclonal antibody is secreted by hybridoma 3A6 with a preservation number of CCTCC NO: C201340; the ceftiofur monoclonal antibody is secreted by hybridoma 4D5 with a preservation number of CCTCC NO: C201341, and the chip fixes cefalexin coating antigen and cefalexin coating antigen. The invention further discloses an antibody chip method for detecting residual cephalosporin antibiotics in food, the method can be used for simultaneously detecting 8 kinds of cephalosporins, and has the advantages of high accuracy, high precision, high efficiency, etc.

The invention discloses original development quality ceftazidime and a medicine preparation thereof. The third-generation cephalosporin antibiotics active ester midbody key technology and industrialization obtains the second prize of National Scientific and Technological Progress Award. The cephalosporin antibiotics active ester belongs to a key factor for influencing the internal quality of the cephalosporin. A preparation method comprises the following steps that (a) mixed solvents are added into ceftazidime side chain acid, dibenzothiazyl disulfide, aniline and 2-picoline; triethyl phosphate is dripped for reaction; (b) a coarse product is refined to obtain ceftazidime side chain acid active ester, and the first mother liquid is recovered; (c) the material is added into a mixed solvent for neutralizing 7-APCA; triethylamine is dripped; the temperature reduction is performed for crystal separation and filtering to obtain ceftazidime tert-butyl ester; the second mother liquid is recovered; (d) the ceftazidime tert-butyl ester is subjected to hydrolysis and purification, and then, the ceftazidime is obtained. The original development quality ceftazidime has the advantages that high-toxicity triphenylphosphine is not used; waste liquid and waste slag can be sufficiently recovered and reutilized; the method is safe; the cost is low; the yield is high; the industrial production is facilitated.