发明名称 |
Penicillin crystals and process for producing the same |
摘要 |
The present invention provides 2&bgr;-chloromethyl-2α-methylpenam-3α-carboxylic acid benzhydryl ester (CMPB) crystals of excellent stability, and a process for producing the CMPB crystals comprising the steps of (A) concentrating a solution containing CMPB; (b) subjecting the thus-obtained concentrate to column chromatography; (C) concentrating a CMPB-containing fraction; and (D) dissolving the thus-obtained CMPB-containing concentrate in an ether solvent and adding a hydrocarbon solvent to the resulting solution to precipitate CMPB crystals.
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申请公布号 |
US7692003(B2) |
申请公布日期 |
2010.04.06 |
申请号 |
US20060574278 |
申请日期 |
2006.03.31 |
申请人 |
OTSUKA CHEMICAL CO., LTD.;TAIHO PHARMACEUTICAL CO., LTD. |
发明人 |
WADA ISAO;KAMEYAMA YUTAKA |
分类号 |
C07D477/14;C07D499/00;C07D499/86 |
主分类号 |
C07D477/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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