Process for the preparation of 3-vinyl and substituted vinyl
申请人:Glaxo Laboratories Limited
公开号:US04110534A1
公开(公告)日:1978-08-29
The invention is concerned with the preparation of .DELTA..sup.3 -4-carboxy cephalosporin antibiotics possessing a 3-vinyl group or substituted 3-vinyl group by means of phosphorous intermediates.