(E)-2-Diazo-3-oxo-hex-4-enoic acid 2-trimethylsilanyl-ethyl ester 、 3-phenoxyacetamido-4-tertbutyldimethylsilyloxymethylazetidin-2-one 在
dirhodium tetraacetate 作用下,
以
苯 为溶剂,
反应 1.0h,
以42%的产率得到(E)-2-[(2S,3S)-2-(tert-Butyl-dimethyl-silanyloxymethyl)-4-oxo-3-(2-phenoxy-acetylamino)-azetidine-1-carbonyl]-pent-3-enoic acid 2-trimethylsilanyl-ethyl ester