Cis-4-oxoazetidine intermediates and methods of preparing them
申请人:SmithKline Corporation
公开号:US04072674A1
公开(公告)日:1978-02-07
The stereospecific cycloaddition of nitrogen containing acetic acid halides or anhydrides with Schiff bases having a carbalkoxy group substituted on the methine carbon atom offers new intermediates and methods for preparing synthetic cephalosporin congeners having antibacterial activity.
3-Amino-2-hydroxy, halo or mercaptomethyl-4-oxoazetidines
申请人:SmithKline Corporation
公开号:US04257947A1
公开(公告)日:1981-03-24
The stereospecific cycloaddition of nitrogen containing acetic acid halides or anhydrides with Schiff bases having a carbalkoxy group substituted on the methine carbon atom offers new intermediates and methods for preparing synthetic cephalosporin congeners having antibacterial activity.