[EN] A NEW PROCESS FOR THE PREPARATION OF CEFDITOREN USING THE THIOESTER OF THIAZOLYLACETIC ACID<br/>[FR] NOUVELLE METHODE DE PREPARATION DE CEFDITORENE UTILISANT LE THIOESTER D'ACIDE THIAZOLYLACETIQUE
申请人:ORCHID CHEMICALS & PHARM LTD
公开号:WO2003099826A1
公开(公告)日:2003-12-04
The present invention provides a process for the preparation of Cefditoren of formula (I) which comprises acylating 7-amino-cephem carboxylic acids of the general formula (IV), where R3 is hydrogen or trimethylsilyl with thioester derivatives of the formula (II), where R1 represents C1 - C4 alkyl or phenyl in an organic solvent in the presence of an organic base at a temperature in the range of -10 °C to 30 °C.
Process for the preparation of cefditoren using the thioester of thiazolylacetic acid
申请人:——
公开号:US20030225265A1
公开(公告)日:2003-12-04
The present invention provides a process for the preparation of Cefditoren of formula (I)
1
which comprises acylating 7-amino-cephem carboxylic acids of the general formula (IV), where R
3
is hydrogen or trimethylsilyl with thioester derivatives of the formula (II), where R
1
represents C
1
-C
4
alkyl or phenyl in an organic solvent in the presence of an organic base at a temperature in the range of −10 ° C. to 30 ° C.