(6
R)-4-((
Z)-3-methoxycarbonyl-phenylsulfanylmethylene)-3-methyl-8-oxo-7
t-(2-phenoxy-acetylamino)-(6
rH)-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid 2,2,2-trichloro-ethyl ester 在
溶剂黄146 、
锌 作用下,
生成
2-<(Z)-3-Methoxycarbonyl-phenylmercapto-methylen>-3-methyl-7-phenoxyacetylamino-3-cephem-4-carbonsaeure