32 results about "Cefazedone sodium" patented technology

The present invention provides a cefazedone sodium medicament powder injection composed of 100% of cefazedone sodium. The cefazedone sodium is prepared by a method as follows: (1) 7-ACA and 3, 5-dichloro pyridine acetic acid react with each other with the action of an anhydrating agent, a mixture after the reaction is post-processed to obtain an intermediate product I; (2) the intermediate productI and 2-mercapto-5-methyl-1, 3, 4-thiadiazoles react with each other with the protection of nitrogen at a temperature of 50 to 90 DEG C, a mixture after the reaction is purified to obtain a water solution which is added with an inorganic acid to regulate pH value to be equal to 1 to 3, a precipitation is extracted from the water solution and is post-processed to obtain cefazedone; (3) the cefazedone and sodium hydrogen carbonate react with each other in water to obtain a cefazedone sodium solid body after an aftertreatment. The powder injection has single component and perfect dissolution performance, the raw medicine has a short synthetic route, the aftertreatment of the intermediate product or final product are all simple, and the yield and purity of the whole reaction process are all high.

The invention discloses a preparation method of a cefazedone sodium compound. 7-ACA and a compound III react to prepare a compound IV, and the compound IV and a compound V have an amidation reaction,and are salified and refined to obtain a competitive product of cefazedone sodium (I). The process route of the reaction is simple, the total yield and the purity are high, and the method is suitablefor industrial production.

The invention relates to a synthetic process of a novel cephalosporin anti-infective drug. A thioester compound (formula III) synthesized by adopting 3,5-dichloro-4-pyridone-1-acetic acid and 2-thiol-5-methyl-1,3,4-thiadiazole as raw materials is directly reacted with 7-ACA in one step to successfully prepare cefazedone sodium. According to the synthetic process disclosed by the invention, the operating steps are simplified, so that the production conditions are milder, the generation of byproducts is reduced, and the production technology is simpler; and moreover, the product yield and purity are greatly improved, the cost is reduced, the environmental pollution is little, and the synthetic process is higher in environmental protection, so that the process accords with the requirement of industrialization.

The invention discloses an anti-infective medicinal cefazedone sodium composition, and belongs to the technical field of medicines. The composition consists of cefazedone sodium and sodium chloride; the cefazedone sodium is crystals; an X-ray powder diffraction pattern obtained by measuring the crystals by using Cu-K alpha rays is shown as figure 1; the main particle size of the crystals of the cefazedone sodium is 150 to 180 mu m, and the distribution width is 135 to 195 mu m. The new crystal form of the cefazedone sodium provided by the invention is different from the crystal form structure in the prior art; through experimental verification, people surprisingly find that powder-injection prepared by utilizing the new crystal form compound is high in mobility compared with the prior art; moreover, the content of impurities and the content of water are effectively reduced; the product is high in safety and high in stability.

The invention belongs to the technical field of medicine and particular relates to a novel compound of an anti-infection drug and a preparation method thereof. According to the compound, characteristic peaks are displayed at diffraction angles of 3.5 degrees, 4.6 degrees, 8.4 degrees, 12.5 degrees, 13.8 degrees, 16.2 degrees, 19.0 degrees, 19.5 degrees, 20.0 degrees, 21.1 degrees, 27.1 degrees and 33.1 degrees in an X-ray powder diffraction pattern obtained through measurement by Cu-KAlpha rays. The invention further relates to powder injection containing 100% cefazedone sodium. The new crystal from of the compound is different from that in the prior art, through experimental verification, it is surprised to find that compared with the prior art, the powder injection obtained by direct subpackage of the compound of the novel crystal form does not need any auxiliary material and is good in liquidity, the content of impurities and moisture is reduced effectively, the safety of products is good, and the stability is high.

The invention relates to a preparation method for a cephalosporin anti-infective drug-cefazedone sodium, belonging to the field of pharmaceutical synthesis. According to the invention, the method uses GCLE as a raw material to substitute 7-ACA and overcomes the defects of low yield, high pollution and the like in prior art; the preparation method with mild reaction conditions, little side reaction and simple process is provided; meanwhile, the method has the advantages of cheap and easily-available raw materials, low cost, high product yield, high product purity and applicability to industrial production.

Belonging to the field of pharmaceutical preparation, the invention relates to cefazedone sodium frozen powder injection which comprises 45-90% of cefazedone, 5-52% of excipient, 0.02-5% of antioxygen; wherein the excipient is composed of one or more of mannitol, sorbic alcohol or lactose, the antioxygen is composed of one or more of arginine, cysteine hydrochloride or glutathione. The cefazedonesodium frozen powder injection features stable physical and chemical properties, controllable quality; in addition, polymer impurities of the cefazedone sodium frozen powder injection are obviously reduced in the process of storage, thus improving safety of using the injection.

The invention discloses a preparation method of a cefazedone sodium compound. 7-ACA and a compound III react to prepare a compound IV, and the compound IV and a compound V have an amidation reaction,and are salified and refined to obtain a competitive product of cefazedone sodium (I). The process route of the reaction is simple, the total yield and the purity are high, and the method is suitablefor industrial production.

The invention relates to a preparation method of a novel anti-infective drug. The preparation method comprises the following steps: (1) salifying, namely putting cefazedone and a sodium acetate solvent in absolute methanol to have a salifying reaction, and controlling the temperature in the range of 10-30 DEG C after the cefazedone is completely dissolved, (2) decoloring, namely adding active carbon to a reaction liquid, stirring and decoloring, and removing the active carbon by filtering, keeping the temperature of the filtrate in the range of 10-30 DEG C, and then re-filtering; (3) crystalizing, namely slowly and dropwise adding a certain amount of ethanol to the filtered filtrate at a rate of 20L / H under a stirring condition until the system is turbid, growing crystals for 0.5 to 1 hour, next, adding a certain amount of acetone, growing crystals for 0.5 to 1 hour, and then reducing the temperature to 5 DEG C at a temperature reducing rate of 5-15 DEG C per hour, and stirring by keeping the stirring speed in the range of 80-120r / min for crystallization, and growing the crystals for 1-3 hours; and (4) drying, namely filtering and washing the filter cake, and drying to obtain refined cefazedone sodium. Compared with the prior art, the preparation method is simple to operate, low in cost and high in yield, and pollution is greatly reduced; and the obtained refined cefazedone sodium is low in moisture content, low in impurity content and high in stability.

The present invention belongs to the technical field of medicine, and particularly relates to a novel cephalosporin cefazedone sodium crystal form compound and a preparation method thereof. According to the present invention, the cefazedone sodium crystal form compound is a cefazedone sodium hydrate, is different from the cefazedone sodium reported in the prior art, and has the X-ray powder diffraction pattern represented by a Figure 1; and the test results show that the cefazedone sodium hydrate has characteristics of significantly increased stability and good fluidity compared with the cefazedone sodium hydrate in the prior art.

The invention provides a preparation method of Cefazedone sodium salt, comprising the following main steps: adding Cefazedone acid into a methanol-isopropanol mixed solvent, adding methanol / triethylamine to carry out a salt forming reaction, regulating pH by adding acetic acid, adding sodium acetate and seed crystals to precipitate out sodium salt, growing the grain, adding acetone to completely precipitate out crystals, carrying out programmable heating and vacuum drying to obtain a finished product. an anhydrous system is adopted in the method without the need of humidification, and moisturecan reach 0.5% and below; the content of residual solvent is low, and the contents of methanol, isopropanol and acetone are all below 0.1%; the production cycle is shortened and the production cost is lowered; and there are few crystal impurities and the purity is high.

The invention relates to an enzymatic synthesis technology of a novel cephalo-type anti-infection drug. The technology comprises the following steps: preparing TDA hydrochloride from TDA, purifying, processing to prepare TDA sodium salt, and directly carrying out enzymatic synthesis of cefazedone sodium in a water phase under the action of immobilized penicillin acylase. The enzymatic synthesis technology has the advantages of operating step simplification, implementation of a reaction in the water phase, mild reaction conditions, few byproducts, great reduction of energy consumption and organic wastewater discharge, cost reduction, small pollution to environment, good environmental protection property, and industrialization requirement meeting; and the technology greatly improves the product yield and the product yield, the product purity is greater than 99.9%, and the total yield is greater than 90%.

The invention relates to a purifying method of a novel antibiotic compound. The method includes: (1) a step of salifying, namely a step of adding cefazedone and sodium isooctoate into absolute methanol and performing a salifying reaction until the cefazedone is fully dissolved, with the temperature being controlled at 15-35 DEG C; (2) a step of decoloring, namely a step of adding active carbon into the reaction solution, stirring, decoloring, filtering to remove the active carbon, maintaining the temperature of the filtrate at 10-30 DEG C, and filtering again; (3) a step of crystallizing, namely a step of adding a certain amount of acetone and ethyl acetate into the filtrate after the filtration, controlling the temperature at 15-20 DEG C, growing the grain for 1-2 h, then adding a certain amount of the acetone and the ethyl acetate, stirring for crystallization with the stirring speed being maintained at 80-120 r / min, controlling the temperature at 15-25 DEG C, and growing the grain for 2-4 h; and (4) a step of drying, namely a step of filtering, washing the filter cake, and drying to obtain a purified product of the cefazedone sodium. Compared with the prior art, the method has characteristics of simple operation, low cost, high yield, and largely reduced pollution. The purified product of the cefazedone sodium has characteristics of low water content, low purity content and high stability.