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公开(公告)号:EP1556500A1
公开(公告)日:2005-07-27
申请号:EP03773688.1
申请日:2003-10-30
IPC分类号: C12P35/04 , C12N9/84 , C07D501/36
CPC分类号: C12Y305/01011 , C12P35/04
摘要: A process for preparing the 7-(1-H-tetrazol-1-yl) acetamide-3-(2-methyl-1,3,4-thiadiazol-5-yl)thiomethyl-3-cephem-4-carboxylic acid or cefazolin, comprising catalysing the acylation of the amino β-lactam, the 7-amino-3-[5methyl-1,3,4-thiadiazol-2-yl)thiomethyl]-3-cephem-4-carboxylic acid, of the formula with an activated acylating agent derived from acetic acid in the presence of a biocatalyst comprising penicillin amidase, and a product of the formula I obtainable by the foregoing process according to claims.