Method for preparing meropenem

A meropenem-specific technology, applied in the field of medicine, can solve problems such as poor production operability and planning, maximize chemical reaction efficiency, and low equipment utilization, so as to improve production operability, ensure product purity, and improve The effect of controllability

Inactive Publication Date: 2011-08-17
重庆天地药业有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially in the preparation process of MAP and protected meropenem, the crystallization method is to use continuous low-temperature stirring for several hours or even dozens of hours before the amorphous crystals precipitate (sometimes still cannot precipitate), which makes the production operability and planning poor. chance factor
[0006] Although WO2006/035300 improved the condensation and hydrogenolysis of MAP in the side chain of meropenem, which improved the production e

Method used

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  • Method for preparing meropenem
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  • Method for preparing meropenem

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: Add 50 g of diazoketone ester to a 1000 ml three-neck bottle connected with an exhaust gas absorption device, add 260 ml of anhydrous ethyl acetate (water content <0.05%), stir to dissolve, heat up to 75 ° C, remove the heat source, and stop Heating, add 0.25g of rhodium octanoate at one time, a large amount of gas overflows, the gas overflow is not obvious after half an hour, take a sample, when the content of diazoketone ester is lower than 0.3%, prepare for the next step reaction, if it is higher than 0.3%, keep it warm The reaction was continued for 30 minutes.

[0016] In another 1000ml three-neck flask, add 300ml of acetonitrile, then pre-cool to -25°C in a low-temperature reactor, add the reaction solution of the cyclization in the previous step at one time, wash and combine with 50ml of acetonitrile, add 20ml of triethylamine, and add diphenyl The oxyphosphoryl ratio is 45ml, adjust the temperature and react at -15°C for 1 hour, take a sample, and whe...

Embodiment 2

[0017] Embodiment 2: (replace rhodium octanoate with rhodium acetate)

[0018] Add 50g of diazoketone ester to a 1000ml three-necked bottle connected with an exhaust gas absorption device, add 260ml of anhydrous ethyl acetate (water content<0.05%), stir to dissolve, heat up to 75°C, remove the heat source, stop heating, disposable Add 0.21g of rhodium acetate, a large amount of gas escapes, and the gas overflow is not obvious after half an hour. Take a sample. When the content of diazoketone ester is lower than 0.3%, prepare for the next step of reaction. If it is higher than 0.3%, keep warm and continue the reaction for 30 minutes .

[0019] In another 1000ml three-neck flask, add 300ml of acetonitrile, then pre-cool to -25°C in a low-temperature reactor, add the reaction solution of the cyclization in the previous step at one time, wash and combine with 50ml of acetonitrile, add 20ml of triethylamine, and add diphenyl The oxyphosphoryl ratio is 45ml, adjust the temperature ...

Embodiment 3

[0020] Example 3: Purification of Meropenem

[0021] Add 10 g of the crude meropenem above into a 500 ml three-necked bottle, add 400 ml of purified water to dissolve, add 1 g of carbon to decolorize for 30 minutes, filter, add the filtrate to a 1000 ml three-necked bottle, add 2000 ml of acetone dropwise at 10-15 ° C, the aqueous solution becomes cloudy, Crystals were precipitated, grown for 30 minutes, filtered, washed with 20ml of acetone, and dried at -0.09kpa / 40°C for 2 hours. The finished product of meropenem was 8.8g, with a yield of 88% and a content of 98.9% (normalized method).

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Abstract

The invention relates to a method for preparing meropenem, and belongs to the field of chemical Chinese herbal medicines. In the method, the meropenem is prepared by performing catalytic hydrogenolysis on meropenem from a key intermediate 9H of the meropenem directly by the conventional catalytic cyclization esterification protective condensation process without separation. The method simplifies a production process, is high in yield and low in cost, production links are reduced obviously, the efficiency is improved, and the cost is saved.

Description

Technical field: [0001] The invention belongs to the technical field of medicine, and relates to a key intermediate for preparing meropenem sodium and a preparation method of meropenem. It avoids the original process of separately preparing each intermediate and requiring complex post-treatment, simplifies the production process, and improves equipment utilization and labor efficiency. technical background: [0002] Meropenem (meropenem), chemical name: (4R, 5S, 6S)-3-[[(3S, 5S)-5-(dimethylcarbamoyl)-3-pyrrolidine]sulfur]-6-[( 1R)-1-hydroxyethyl]-4-methyl-7-oxo-1-oxybicyclo[3,2,0]-hept-2-ene-2-carboxylic acid trihydrate belongs to the second generation of high-efficiency broad A spectrum of fully synthetic carbapenem antibiotics. The chemical structural formula is as follows (1): [0003] [0004] At present, in the production process of meropenem at home and abroad, all are based on [0005] 4-AA→4-BMA→MAP→protect meropenem and then hydrogenolyze meropenem route. Th...

Claims

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Application Information

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IPC IPC(8): C07D477/20C07D477/08
Inventor 白智全吴建军
Owner 重庆天地药业有限责任公司
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