A kind of raw material of cephalosporins and preparation method thereof

A technology of cephalosporins and pharmaceutical preparations, applied in the field of medicine, can solve the problems of corrosiveness, difficulty in preservation, crystallization and inability to stabilize heptahydrate compounds, etc., and achieve the effects of improving quality, saving costs, and reducing waste of reagents and energy

Inactive Publication Date: 2011-11-30
北京美迪康信医药科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the acylation of 7-β amino halides, the data show that bromoacetyl bromide is used. This compound is corrosive and difficult to store after absorbing water.
The final product is generally selected in iso

Method used

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  • A kind of raw material of cephalosporins and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take 77g of 7-MAC, add 550ml of ethyl acetate, dissolve completely, at 0°C, add 5ml of p-methylaniline, keep the temperature at 0°C, add 24ml of chloroacetyl chloride, add 60ml of ethyl acetate, keep warm for 1 hour, add water, Static layering, followed by saturated KHSO 4 150ml of water, 150ml of water, 150ml of saturated sodium bicarbonate to wash the organic solvent layer, add 20g of anhydrous magnesium sulfate, keep the organic solvent layer to obtain solution B; mix 117g of anhydrous aluminum trichloride, 128ml of anisole, and 385ml of ethyl acetate Mix and dissolve, add solution B at minus 20°C, react at temperature for 1 hour, and filter; after filtration, dissolve the solid in a mixed solution of 385ml of water, 50ml of concentrated hydrochloric acid, 385ml of ethyl acetate, and 38.5g of sodium chloride, and control the temperature 5°C, stir to dissolve completely, stand to separate layers, extract the water layer with 150ml of ethyl acetate to obtain an organi...

Embodiment 2

[0028] Take 400g of 7-MAC, add 2700ml of dichloromethane, dissolve completely, add 25ml of N,N-dimethylaniline at minus 20°C, keep the temperature at minus 20°C, add 120ml of chloroacetyl chloride, add 310ml of methylene chloride, Insulate for 5 hours, add water, let stand to separate layers, and then use saturated KHSO 4 750ml, water 750ml, saturated sodium bicarbonate 750ml, wash the organic solvent layer, add anhydrous magnesium sulfate 100g, keep the organic solvent layer, and obtain solution B; anhydrous aluminum chloride 575g, isopropyl ether 635ml, and dichloromethane 1900ml Mix and dissolve, add solution B at 0°C, control the temperature and react for 1 hour, then filter; after filtration, dissolve the solid in a mixed solution of 1900ml of water, 270ml of concentrated hydrochloric acid, 1925ml of ethyl acetate, and 190g of sodium chloride, and control the temperature at 20°C , stir to dissolve completely, stand to separate layers, extract the water layer with 800ml o...

Embodiment 3

[0032] Take 150 g of 7-MAC, add 1100ml of tetrahydrofuran, dissolve completely, add 80ml of p-nitroaniline at minus 5°C, keep the temperature at minus 5°C, add 50ml of chloroacetyl chloride, add 121ml of tetrahydrofuran, keep warm for 2 hours, add water, and keep the temperature at minus 5°C. Set the layers, followed by saturated KHSO 4 Wash the organic solvent layer with 310ml of water, 300ml of water and 310ml of saturated sodium bicarbonate, add 100g of anhydrous magnesium sulfate, keep the organic solvent layer, and obtain solution B; mix and dissolve 240g of anhydrous aluminum trichloride, 260ml of diethyl ether, and 790ml of tetrahydrofuran, and dissolve in Add solution B at minus 5°C, react at temperature for 4 hours, and filter; after filtration, dissolve the solid in a mixed solution of 790ml of water, 110ml of concentrated hydrochloric acid, 770ml of ethyl acetate, and 77g of sodium chloride, control the temperature at 10°C, and stir completely The water layer was e...

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Abstract

The invention belongs to the technical field of medicine. The invention discloses a raw material of cephalosporins and a preparation method thereof. The raw material contains (6R,7S)-7-[2-[(S)-2-amino-2-carboxyethyl Thio]acetylamino]-7-methoxy-3-[[(1-methyl-1H-tetrazol-5-yl)thio]methyl]-8-oxo-5-thia-1- Sodium azabicyclo[4.2.0]oct-2-ene-2-carboxylate heptahydrate, content greater than or equal to 99.6% less than 100%; containing 7-[2-[2-amino-2-carboxyethylthio] Acetylamino]-7-methylthio-3-[[(1-methyl-1H-tetrazol-5-yl)thio]methyl]-8-oxo-5-thia-1-azabicyclo [4.2.0] Oct-2-ene-2-carboxylic acid or 7-[2-[2-amino-2-carboxyethylthio]acetamido]-7-methylthio-3-[[(1- Sodium methyl-1H-tetrazol-5-yl)thio]methyl]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate, The content is greater than 0 and less than or equal to 0.3%.

Description

technical field [0001] The invention belongs to the technical field of medicine, and in particular relates to a raw material of cephalosporins and a preparation method thereof. Background technique [0002] There are many cephalosporin antibiotics on the market in China, and they are widely used clinically, playing an important role in the treatment of infectious diseases. However, analysis shows that most of the marketed cephalosporin antibiotics are Cephalosporins. From the first generation of cephalexin and cefadroxil to the new generation of cefotaxime, ceftriaxone, cefpirome, etc., although each generation of cephalosporin antibiotics has its own characteristics, the common feature of its chemical structure is that Cephalosporin nuclei, namely cephalosporin alkanoic acid (7-ACA) nuclei. Various cephalosporin antibiotics are derivatives obtained by introducing different side chains at the 7-position and 3-position of the core. However, the common defect of these antib...

Claims

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Application Information

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IPC IPC(8): C07D501/57C07D501/04A61K31/546A61P31/04
Inventor 田立文陆一志邵玉平
Owner 北京美迪康信医药科技有限公司
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