(6
R)-3-methyl-4-(
Z)-methylsulfanylmethylene-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
3-Methyl-2-<(Z)-methylmercapto-methylen>-7-phenoxyacetylamino-3-cephem-4-carbonsaeure