52 results about "Biapenem" patented technology

The invention is a synthesis method of the biapenem, with the MAP ((1R, 5R, 6R) 2-(drophenyl phosphate)-6-[(R)-1- hydroxyethyl]-1-methyl-1-1 - carbapenems-2-en-3-formic acid benzyl ester of p-nitrophenol)) and the 6, 7-dihydro-6-mercapto-5 H-pyrazol [1,2 - a] [1,2 , 4]-triazole chloride ( the intermediate III) as the starting materials; after the condensation, hydrolysis and the fine preparation reaction and synthesis, the biapenem is made.

The invention relates to a biapenem compound and a preparation method thereof, which comprises the following steps: 1) dissolving crude biapenem in water, then adding activated carbon, keeping warm, fully stirring, filtering the deactivated carbon, and collecting the filtrate; 2) dissolving The filtrate obtained in the previous step is separated and purified by column chromatography, and the eluent is collected; 3) the temperature is increased to concentrate the above-mentioned eluent solution, and then adding ethanol and acetone with a volume ratio of 1: 0.5~2 mixed solvent solvent, and control temperature for crystallization, the precipitated crystals are centrifuged, washed, and dried to obtain a refined biapenem compound; 4) Optionally, the crystallization mother liquor is returned to step 3), that is, added to the eluting solution obtained in step 2) together with a mixed solvent. By adopting the method of the invention, the purity of crude biapenem can be greatly improved, the quality of preparation products can be improved, and toxic and side effects can be reduced.

The invention relates to a crystal form of 6, 7-dihydro-6-mercapto-5H-pyrazolo [1,2-alpha][1,2,4] triazoliumchloride and a preparation method thereof. The 6, 7-dihydro-6-mercapto-5H-pyrazolo [1,2-alpha][1,2,4] triazoliumchloride is a key intermediate for synthesizing the carbapenem antibiotic biapenem. The crystal form of 6,7-dihydro-6-mercapto-5H-pyrazolo[1,2-alpha][1,2,4] triazoliumchloride is characterized in that the X-ray diffraction spectrum of powder of the crystal form is represented by an angle of 2theta, and has peaks at 27.487+/-0.2 and 26.707+/-0.2, the intensity of the peak is 100% when 2theta is 27.487+/-0.2, and the ratio of intensity of the peak I/I0 is no less than 60% when 2theta is 26.707+/-0.2. The 6, 7-dihydro-6-mercapto-5H-pyrazolo[1,2-alpha][1,2,4] triazoliumchloride is prepared by the recrystallization method which abandons the column chromatography and has high efficiency and low cost and is more suitable for industrialized production.

The invention discloses a method for preparing biapenem, which is applicable to industrialization. The method comprises the following steps: performing a hydrogenation reaction on aprotic polar organic solvent serving as the solvent for a catalytic hydrogenation reaction and H2 in the presence of a catalyst; removing the protective group of a compound in a formula (II); and collecting the biapenem in reaction mixture. By using the method, the usage amount of reaction solvent is small, and the production capability of a pressure reaction still is greatly improved. Moreover, the reaction condition is mild; the operation is simple; and the biapenem can directly be precipitated from water and the organic solvent by using the solubility of the product without buffer, purification of ion exchange resin, concentration of mass aqueous solution or low temperature freezing crystallization, so that the separation and purification operation processes of the product are simplified, and the reaction yield is improved; and the obtained product has high purity, and the method is applicable to industrial and large-scale production.

The invention discloses a biapenem crystalline solid and a preparation method thereof. X ray diffraction spectrogram of the biapenem crystalline powder has a peak at the position where an angle of 2theta is 16.228+/-0.2. The biapenem crystalline solid is prepared by means of crystallization, three kinds of reagents are used, operation is simple, cost is low, crystalline particles are uniform, solid-liquid separation and dying are convenient and the preparation method is suitable for industrial production. The biapenem crystalline solid prepared with the preparation method has the advantages that purity of crystalline solid is high, and the crystalline solid has good stability in bright, hot and humid environments.

The invention relates to a preparation method for a biapenem condensation compound shown in a formula II and a crystalline solid thereof. Impurities in reaction raw materials can be effectively removed by adding a lower alcohol solvent in a reaction system so as to obtain the crystalline solid of the biapenem condensation compound with high purity. Because particles of the obtained crystalline solid of the biapenem condensation compound are large, the crystalline solid is beneficial to solid-liquid separation and drying, and is more suitable for industrial production.

The invention relates to a synthesis method of biapenem ester, which comprises the steps of: 1) under the condition of air isolation, adding organic solvent, compound (II), compound (IV), R13P and alkali into a reactor, controlling the reaction temperature, and reacting for more than 15min; 2) carrying out HPLC monitoring, and using acid to adjust a system to acidity after reaction; and 3) crystallizing, cooling the reaction liquid, adding crystallization solvent for stirring and crystallization, filtering and obtaining the target compound (compound I). The invention has simple and convenient operation, can directly crystallize without needing purification in the reaction, and avoids using biapenem branched chain which is compound (III) and is easy in moisture absorption and difficult to prepare and store.

The invention relates to a preparation method of high-purity biapenem, which includes the steps of: (A) carrying out a condensation reaction with a compound represented as the formula V and a compound represented as the formula VI in an acetonitrile solvent in the presence of a less amount of N,N-dimethylformamide and an organic alkali to obtain a compound represented as the formula VII; (B) carrying out a catalytic hydrogenation to the reaction product in the step (A) in a mixed solution composed of an alcohol solvent and a non-proton polarity organic solvent in the presence of a catalyst and an organic alkali to remove a carboxylic acid protective group in the compound represented as the formula VII; and (C) filtering a reaction mixed solution to obtain a filter cake, adding the filter cake in water with stirring to obtain a filtrate, mixing the filtrates, adding an organic solvent under stirring, performing precipitation crystallization, and filtering and drying a product to obtain the biapenem.

The invention discloses a method for synthesizing biapenem medicine intermediates. The method has the advantages that the biapenem medicine intermediates 4-AA are prepared from (R)-3-polyhydroxybutyrate which is a raw material, and the raw material in the routes is inexpensive, is easily available and can be substantially purchased; the method includes simple steps, the various steps are high in yield, and reaction is simple; chiral reagents and chiral resolution are omitted, accordingly, the method is low in cost and high in yield, and reaction conditions are easily available.

The invention relates to a biapenem crystalline compound, which is measured by using a powder X-ray diffraction measurement method. An X-ray powder diffraction pattern indicated by a diffraction angle of 2 theta +/-0.2 degree shows feature diffraction peak at the positions of 5.9 degrees, 6.5 degrees, 10.5 degrees, 14.8 degrees, 15.6 degrees, 16.3 degrees, 17.4 degrees, 19.8 degrees, 22.9 degrees, 23.7 degrees, 25.1 degrees, 28.4 degrees and 34.7 degrees. The invention further relates to a biapenem composition powder-needle comprising the biapenem crystalline compound. Components of the composition powder-needle are 95 to 100 parts of the biapenem crystalline compound and 0.1 to 1 part of sodium benzoate.

The invention belongs to the technical field of medicines, and discloses a preparation method of biapenem. The method comprises the following steps: p-nitrobenzyl (1R,5R,6S)-6-[(1R)-1-hydroxyethyl]-2-[(diphenylphosphono)oxy]-1-methylcarboxyl pen-2-em-3-carboxylate and 4-sulfydryl-N,N-bis(p-nitrobenzyloxycarbonyl)pyrazolidine are used as raw materials, substitution is performed, hydrogenation is performed and cyclization is performed to synthesize the biapenem. The method provided by the invention overcomes the defects of a long reaction route, easy degradation of raw materials in the reactionprocess, a low yield and the like in the prior art, and is more suitable for industrial production.

The invention provides a biapenem composition freeze-dried powder for injection, and belongs to the field of medicine and medicine preparation technology. The biapenem composition freeze-dried powder comprises following raw material ingredients, by weight, 1 part of biapenem, 0.2 to 10 parts of chitosan nanoparticle, and 91.18 to 93.08 parts of injection water. Advantages of the biapenem composition freeze-dried powder are that: the chitosan nanoparticle is used as a freeze-dried skeleton agent of the freeze-dried powder injection instead of mannitol, so that active effects of mannitol on human bodies are avoided, problems of stability and solubility are solved at the same time, antibacterial effect of biapenem is improved significantly, dosage of biapenem in clinic is reduced, and adverse reaction of biapenem is reduced. The biapenem composition freeze-dried powder is successfully developed, and is capable of providing novel ideas for clinical application of biapenem.

The invention discloses a preparation method of biapenem. The preparation method comprises the following steps: (a) by using a compound shown in a formula III as a raw material, adding a palladium catalytic system with the weight ratio of triphenyl phosphine and tri(triphenyl phosphine) palladium of (1-3) to 1 into an organic solvent, and stirring to reaction for 1.5-2 hours at 10-50 DEG C, wherein the addition of tri(triphenyl phosphine) palladium is 1.5-2% of formula III; (b) adding water into a reaction liquid in the step (a) to dilute, washing by dichloroethane or dichloromethane, and decompressing and concentrating to obtain an aqueous solution, wherein the water phase contains biapenem; and (c) adjusting the pH of the biapenem aqueous solution obtained in the step (b) to 5-6 by an organic solvent, adding acetone or ethanol, cooling to below room temperature, stirring and carrying out crystallization for 2-3 hours to separate out biapenem crystals. In the reaction process, hydrogen is not used, and the reaction does not generate hydrogen too. The reaction condition is mild, and the production safety is greatly improved. In the reaction, buffer salt needs not to be added to control the pH of the reaction liquid, so that the preparation method is suitable for industrialized production and simple to operate.

The invention discloses an HPLC detection method of biapenem side chain related substances. Linear gradient elution is carried out by using octadecylsilane chemically bonded silica as a filler and using a mixed solution of a buffer solution of which the pH value is 3.0-4.5 and an organic solvent as a mobile phase. The detection sensitivity of the detection method provided by the invention is obviously improved compared with that of related substances of the apixem side chain, the separation degree of each impurity and a main peak is very good, and the increase of hydrolyzed impurities can be effectively controlled.

The invention provides an application of biapenem in preparation of a medicine for preventing and treating bovine enterovirus infection. The compound biapenem can effectively inhibit proliferation ofbovine enterovirus and has low toxicity to cells, and experiments prove that the median toxicity concentration (CC50) of biapenem to MDBK cells is greater than 100 [mu]M, and the median effective concentration (EC50) of biapenem to bovine enterovirus is 60 [mu]M; the treatment index of biapenem to bovine enterovirus is greater than 1.67, which indicates that biapenem has a prospect of being developed into a drug for preventing and/or treating bovine enterovirus infection, opens up the new drug application for biapenem, lays an experimental foundation for developing efficient and specific anti-BEV drugs, and provides a new visual field.

The invention relates to a preparation method of biapenem as shown in the formula 1. The method comprises the following steps of: using a biapenem intermediate I as a raw material, using a single solvent--water as a reaction solvent and conducting a hydrogenated deprotection reaction in the presence of alkali and a catalyst. The single solvent water is used as a reaction solvent, thus solving the problem of dissolving the catalyst by the reaction solvent, simplifying post-treatment operational step, reducing product degradation and raising product purity. In addition, the preparation method is economical, safe and environmentally friendly, and is more suitable for industrial operation at large scale.

The invention belongs to the technical field of chemical pharmacy, and particularly relates to a refining method of a biapenem crude product. According to the invention, a biapenem refining process is optimized, and crystallization is carried out by stages under different temperature conditions by adopting a reverse crystallization mode of dropwise adding a feed liquid into a crystallization agent. The temperature of first crystallization is-10 to 10 DEG C, crystallization is carried out at a low temperature, crystals can be rapidly separated out, the form of the crystals is easy to control, and the granularity of the crystals of the obtained product is small; the temperature of secondary crystallization is 5-30 DEG C, and crystallization is carried out at a relatively high temperature, so that solvent residues of the product can be reduced. The product prepared by the method disclosed by the invention is short in redissolution time, high in purity, high in yield and good in stability, the crystal form of the product is consistent with that of an original product, and a powerful guarantee is provided for product consistency evaluation.

The invention relates to a biapenem dimer with a structure shown in the following formula and a preparation method and an application thereof. The preparation method comprises the steps of: weighing biapenem raw material, dissolving in acidic water solution as solvent to obtain a solution; standing at 25-100DEG C (at 25-50DEG C for 24 hours and at 51-100DEG C for 1-4 hours), and filtering to obtain filtrate; and separating the filtrate with reversed phase high performance liquid chromatography, and preparing the dimer. The biapenem dimer can be used as a reference substance of biapenem impurities to facilitate the control of the amount of biapenem and related preparations thereof.