60 results about "Cefazolin Sodium" patented technology

The invention relates to a preparation method of a pharmaceutical compound, in particular relates to a preparation method of cefazolin sodium. The preparation method provided by the invention comprises the following steps: step 1, synthesizing TDA (toluene diamine); step 2, synthesizing cefazolin; and step 3, synthesizing cefazolin sodium.

The invention relates to monohydrate cefazolin sodium special particles and a crystallization preparation method thereof. The average particle size of the monohydrate cefazolin sodium special particles is greater than 300mu m, the variable coefficient C.V. of the monohydrate cefazolin sodium special particles is smaller than 0.3, and the bulk density of the monohydrate cefazolin sodium special particles is greater than 0.4g/ml. The crystallization preparation method comprises the following steps: adding cefazolin sodium solid into a solvent system, preparing a solution of which the mass concentration is 0.01-0.12 at 40 DEG C, cooling to be 5-35 DEG C, adding a bridging agent, and stirring at the speed of 100-500rpm so as to separate out crystal; transferring the crystal mush into a filtering system, and drying the filter cakes till constant weight, thereby obtaining the monohydrate cefazolin sodium special crystal. The invention further discloses application of the special particles as an effective medicine component for treating, preventing or delaying various infection diseases caused by sensitive bacteria. The monohydrate cefazolin sodium special particles are simple in process, easy to operate and low in equipment requirement, the process yield is higher than 90.0%, and a spherical medicinal product is relatively excellent in filling property and compression formation property, and is relatively easy in commercial industrial scale production.

The invention provides a preparation method of a cefazolin sodium sterile bulk drug. The preparation method comprises the following steps: suspending cefazolin in deionized water, performing a neutralization reaction with alkali solution containing sodium ions in a hermetic stirring container under depressurized condition, and obtaining the cefazolin sodium sterile bulk drug by rough filtration, sterile filtration and lyophilization of reaction liquid.. The preparation method solves the technical problems of the existing production process that the clarity and the water content of the cefazolin sodium are difficult to be controlled and the contents of related materials are too much higher, improves the product quality and is suitable for large-scale industrialized production.

The invention relates to the technical field of solid-phase extraction, specifically to an oxacillin-and-cephalexin double-template molecularly-imprinted solid-phase extraction column and an application method. The extraction column is cooperatively used with a capillary electrophoresis method for selective separation, enrichment and detection of residues of amoxicillin, cephalexin, oxacillin, penicillin G, cefazolin sodium and cefoperazone sodium in animal food.

The invention provides a cefazolin sodium pentahydrate compound. The structural formula of the cefazolin sodium pentahydrate compound is shown in the specification, the X-ray powder diffraction pattern of the cefazolin sodium pentahydrate compound measured by means of Cu-Ka ray is shown in Figure 1. The invention also provides a preparation method of the cefazolin sodium pentahydrate compound and a medicine composition containing the cefazolin sodium pentahydrate compound. The preparation of the cefazolin sodium pentahydrate medicine is sterile powder injection. Compared with the prior art, the cefazolin sodium pentahydrate compound and the medicine composition of the cefazolin sodium pentahydrate compound provided by the invention are better in storage stability, and medication safety of a patient is greatly improved.

The invention relates to a cefazolin sodium pentahydrate compound of a new route, and particularly provides a method for synthesizing the cefazolin sodium pentahydrate compound. The method comprises the following steps: synthesizing tetrazolyl acetic acid 2-mercapto-5-methyl-1,3,4-thiadiazole ester by using tetrazolyl acetic acid and 2-mercapto-5-methyl-1,3,4-thiadiazole as raw materials; and generating cefazolin sodium through the reaction between the tetrazolyl acetic acid 2-mercapto-5-methyl-1,3,4-thiadiazole ester and 7-aminocephalosporanic acid. Compared with that the method for synthesizing tetrazole acetic acid 2-mercapto-1,3,4-thiadiazole ester in the prior art uses expensive reagents such as trifluoroacetic anhydride, aluminium trimethide or DCC and the like as a condensation agent, the method improves the synthesis method, not only simplifies the operation steps, but also, surprisingly, greatly improves the product yield and the purity, reduces the cost, and lays a foundation for industrialization.

The invention discloses a calcium phosphate cement virgule PLGA virgule cefazolin sodium composite material and a preparation method thereof. The method uses dry ball milling to mix calcium phosphate cement and polyglycolic-polyactic acid, dissolves antibiotics into deionized water to prepare distiller liquor, mixes the antibiotics and the deionized water according to the set solid-liquid ratio, and forms artificial bone activity material, namely calcium phosphate cement virgule PLGA virgule cefazolin sodium composite. The method solves the problem of low strength of bone cement loading with a large quality of antibiotics effectively, improves the biological compatibility, degradability, and degradation tunability of polyglycolicacid, and acheives the aim of controlling medical release and the growth of the induced bone after polyglycolic acid degradation.

The invention discloses a cefazolin sodium compound prepared according to a novel intelligent crystallization technology and a preparation of the cefazolin sodium compound. 'Research, development and industrialization projects of high-end medical product refined crystallization technologies' won second prize of 2015th National Science and Technology Progress Award, and the novel intelligent crystallization technology is among the high-end medical product refined crystallization technologies. The cefazolin sodium compound is determined through X-ray powder diffraction, and main characteristic peaks represented by diffraction angles 2theta in an atlas are 12.24+-0.2 degrees, 16.23+-0.2 degrees, 18.94+-0.2 degrees, 19.26+-0.2 degrees, 19.80+-0.2 degrees, 20.61+-0.2 degrees, 21.05+-0.2 degrees and 23.57+-0.2degrees. Cefazolin sodium is recrystallized by combining a supercritical fluid extraction technology with a traditional crystallization technology. In a whole crystallization system, the process including extraction, adsorption, crystallization and drying is completed to recrystallize the cefazolin sodium at a specific temperature and at specific pressure under the joint action of supercritical fluid, a solvent, an extraction pond and a crystallizing pond. The preparation technology is high in separation efficiency with few impurities, so that preparation product quality is greatly improved.

A method for uploading a cefazolin sodium medicine film on a micro-arc oxidation titanium implant relates to a method for applying an antibiotic medicine film on a medical titanium metal modified coating which serves as a bone substitute. The biological activity of the titanium implant after micro-arc oxidation treatment is greatly improved; and the antibiotic can prevent the wound infection caused by implanting the implant into a body and improve the healing capability of a wound. The method comprises the following steps: putting the titanium implant into a stainless steel tank with alkaline electrolyte; through controlling electrical parameters of the micro-arc oxidation, forming a layer of micro-arc oxidation coating on the titanium surface through breakdown discharge on the titanium surface by using a bipolar pulse power; dipping a titanium substrate after the micro-arc oxidation into an aqueous solution of cefazolin sodium; taking out the micro-arc oxidation titanium substrate soaked in the cefazolin sodium; and putting the titanium substrate into a drying chamber, and drying to obtain micro-arc oxidation titanium implant uploaded with the cefazolin sodium medicine film. By the method, the wound infection caused by implanting the implant into the body can be prevented and the healing of the wound can be promoted.

The invention relates to the technical field of aseptic bulk drugs, particularly to a preparation method of cefazolin sodium for injection. The preparation method comprises the following steps: mixingethanol, cefazolin and a sodium salt according to a molar ratio of 30:(0.1-2.0):(0.1-2.0), adding into a reaction container, heating, carrying out stirring reflux, controlling the pH value at 5.0-9.0, carrying out cooling crystallizing in a water bath, adding cefazolin sodium and purified water into the reaction container according to a molar ratio of 1:(10-20), carrying out heating dissolving, adding a solventing-out agent in a dropwise manner, applying a constant magnetic field, performing microporous sterile filtration on the cefazolin sodium solution in a sterile area, and performing freeze drying, crushing and sterile packaging in the sterile area so as to obtain the cefazolin sodium for injection. According to the invention, the method can solve the problems of high water content and easy influence on the purity of cefazolin sodium in the prior art; and through cefazolin sodium water bath crystallization and magnetic field directional arrangement, the prepared cefazolin sodium for injection is low in moisture content and has the significantly improved hygroscopicity.

The invention discloses a para-cecropin antibacterial peptide and application thereof and belongs to the technical field of molecular biology. The para-cecropin antibacterial peptide consists of 31 amino acids and has the molecular weight of 3833.7Da. The antibacterial peptide can be used for inhibiting the growth of bacteria, such as staphylococcus aureus, avian pasteurella multocida, salmonella gallinarum and avian escherichia coli, has a better bacteriostasis effect compared with the commonly-used antibiotics, such as penicillin, streptomycin, cefazolin sodium and azithromycin, and has stronger bacteriostasis activity compared with the conventional cecropin antibacterial peptides, such as Cecropin B, Cecropin A and Cecropin P1. The antibacterial peptide has the minimum salmonella gallinarum bacteriostasis concentration of 625 micrograms per milliliter, has good thermal stability and has good application prospect in the research and development of antibacterial drugs.

The invention belongs to the technical field of medicine, and in particular relates to a cefazolin sodium compound and an aseptic powder injection thereof. The structural formula of the cefazolin sodium compound is as shown in Formula (I); the compound is measured by a powder X-ray diffraction measurement method; and the X-ray powder diffraction diagram represented by a diffraction angle of 2 theta +/- 0.2 degrees is as shown in Fig . 1. The cefazolin sodium provided by the invention has a relatively low hygroscopicity; and the clinical effect and the bacteriological effect of the aseptic powder injection prepared from the cefazolin sodium provided by the invention are significantly better than those of the prior art. (the formula is shown in the specification).

The invention discloses a cefazolin acetoxy analogue preparation method, wherein the cefazolin acetoxy analogue finished product is prepared by using a 7-ACA solution and a tetrazoleacetic acid mixedanhydride solution as reaction raw materials and carrying out matched control on the raw material ratio, the reaction temperature and the pH value of the system. According to the present invention, the process method for preparing the cefazolin acetoxy analogue by using the chemical synthesis method is provided, such that the cefazolin acetoxy analogue standard substance can be stably and efficiently obtained so as to improve the production quality of cefazolin sodium.

The invention discloses three cefazolin sodium alkali degraded impurity compounds and confirms structures of the impurity compounds thereof. The invention also discloses a preparation method of the three impurity compounds. The preparation method can be used for preparing the impurity compounds, the purities of which are greater than 95%. The invention also discloses an application of the impuritycompounds as a cefazolin sodium raw material, an intermediate or a reference substance of a compound preparation, so that the impurity compounds have important meaning in controlling quality of the cefazolin sodium raw material, the intermediate or the compound preparation.

The invention discloses a method for purifying a cefazolin acid, which is implemented by preparing a crude cefazolin acid product with a content of less than 97% into a sodium salt firstly; then, carrying out adsorption on the sodium salt by using a macroporous resin so as to remove impurities; and finally, reducing the sodium salt to an acid, so that the content, individual impurity and color grade of the obtained cefazolin acid satisfy the demands of being directly used for preparing cefazolin sodium by using a freeze-drying method; and the cefazolin acid can be directly used. The method disclosed by the invention overcomes the defects that single purification in existing purification methods can not meet the requirements of use.

The invention discloses a synthesis method of 2-methyl-5-sulfydryl-1,3,4-thiadiazole. On the basis of an original process, potassium hydroxide in the original process is replaced with liquid ammonia to synthesize an intermediate N-acetylhydrazine ammonium thiocarbamate (ammonium salt); and the drying is not needed for the intermediate; and ring closure and hydrolysis are further carried out on the intermediate in concentrated sulfuric acid; and the intermediate is purified to obtain a target product. In the invention, because the synthetic process of the key intermediate 2-methyl-5-sulfydryl-1,3,4-thiadiazole of cefazolin sodium is modified, the production period is reduced, the raw material cost is reduced, the operation is simplified, the yield of the product is increased and shortcomings of longer production period and high cost in the original technology are also effectively overcome.

The invention discloses a purification method of cefazolin sodium, and relates to the technical field of purification of cefazolin sodium. The method comprises the following steps: (1) after cefazolinis synthesized, adding water for hydrolysis, adding dichloromethane into hydrolysate, then adding hydrochloric acid, controlling the pH value to be 1.3-1.6, standing, carrying out phase splitting, discarding a water phase, and collecting a dichloromethane phase; and (2) adding water into the dichloromethane phase, adjusting the pH value to 6.4-6.7 by using a sodium hydroxide solution, standing, carrying out phase splitting, and discarding the dichloromethane phase to obtain a purified cefazolin sodium solution. The method disclosed by the invention is simple and convenient to operate, short in period and less in wastewater discharge, and has the advantage of environmental protection, and the product cefazolin sodium is high in content, less in impurity variety, low in impurity content andsafe to use as medicine.