[EN] PROCESSES FOR THE PREPARATION OF CEPHEM DERIVATIVES<br/>[FR] PROCEDES DE PREPARATION DE DERIVES DE CEPHEME
申请人:CJ CORP
公开号:WO2005042543A1
公开(公告)日:2005-05-12
Provided is a process for preparing a compound of formula 1 or its salt, which includes reacting a compound of formula 2 with a compound of formula 3 in the presence of a base.