Process and ester derivatives useful for preparation of cephalosporins
申请人:Pfizer Inc.
公开号:US20020099205A1
公开(公告)日:2002-07-25
This invention relates a process for preparing a compound of formula (I)
1
wherein R
1
is para-nitrobenzyl or allyl; and X is halo, which is useful to prepare 3-cyclic-ether-substituted cephalosporins, from trimethylphosphinic compounds. This invention also relates to compounds useful in such process.
PROCESS AND ESTER DERIVATIVES USEFUL FOR PREPARATION OF CEPHALOSPORINS
申请人:Pfizer Products Inc.
公开号:EP1339723A1
公开(公告)日:2003-09-03
COUPLING PROCESS AND INTERMEDIATES USEFUL FOR PREPARING CEPHALOSPHORINS
申请人:Pfizer Products Inc.
公开号:EP1339722A1
公开(公告)日:2003-09-03
US7129350B2
申请人:——
公开号:US7129350B2
公开(公告)日:2006-10-31
[EN] PROCESS AND ESTER DERIVATIVES FOR PREPARATION OF CEPHALOSPORINS<br/>[FR] PROCEDE ET DERIVES D'ESTER UTILES POUR LA PREPARATION DE CEPHALOSPORINES
申请人:PFIZER PROD INC
公开号:WO2002046199A1
公开(公告)日:2002-06-13
This invention relates a process for preparing a compound of formula (I) wherein R1 is para-nitrobenzyl or allyl; and X is halo, which is useful to prepare 3-cyclic-ether-substituted cephalosporins, from trimethylphosphinic compounds. This invention also relates to compounds useful in such process.