(R)-(N-Methyl-N'-methylene-hydrazino)-phenyl-acetyl chloride 、 (2S,5R,6S)-6-Amino-6-methoxy-3,3-dimethyl-7-oxo-4-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid tert-butoxycarbonylmethyl ester 在
methyloxirane 作用下,
反应 1.0h,
以33%的产率得到(2S,5R,6S)-6-Methoxy-3,3-dimethyl-6-[(R)-2-(N-methyl-N'-methylene-hydrazino)-2-phenyl-acetylamino]-7-oxo-4-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid tert-butoxycarbonylmethyl ester