There is provided a process for the preparation of a compound according to Formula (II):
1
which includes the step of cyclising a compound of Formula (III):
2
wherein R
1
, R
2
, R
3
, R
4
, X and m have meanings which are given in the description.
Process for the preparation of cephalosporin compounds and synthetic intermediates
申请人:Pfizer Inc.
公开号:US06825344B2
公开(公告)日:2004-11-30
There is provided a process for the preparation of a compound according to Formula (II):
which includes the step of cyclising a compound of Formula (III):
wherein R1, R2, R3, R4, X and m have meanings which are given in the description.