发明授权
US4110534A Process for the preparation of 3-vinyl and substituted vinyl cephalosporins 失效
制备3-乙烯基和取代的乙烯基胆甾醇的方法

Process for the preparation of 3-vinyl and substituted vinyl
cephalosporins
摘要:
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.
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