(2S,2aS,2bR,5aR,6S)-2-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-2b-methyl-1-oxo-5a-phenylsulfanyl-octahydro-3-oxa-6a-aza-cyclobuta[a]pentalene-6-carboxylic acid benzyl ester 在
间氯过氧苯甲酸 作用下,
以
二氯甲烷 为溶剂,
反应 7.5h,
以95%的产率得到(2S,2aS,2bR,5aR,6S)-5a-Benzenesulfonyl-2-[(R)-1-(tert-butyl-dimethyl-silanyloxy)-ethyl]-2b-methyl-1-oxo-octahydro-3-oxa-6a-aza-cyclobuta[a]pentalene-6-carboxylic acid benzyl ester