(2S,5R,6S)-6-Methoxy-3,3-dimethyl-7-oxo-6-phenylacetylamino-4-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid 2,2,2-trichloro-ethyl ester 在
间氯过氧苯甲酸 作用下,
以
二氯甲烷 为溶剂,
以94%的产率得到(2S,4S,5R,6S)-6-Methoxy-3,3-dimethyl-4,7-dioxo-6-phenylacetylamino-4λ
4-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid 2,2,2-trichloro-ethyl ester