乙烯基乙醚 、
3-(Acetyl-methyl-amino)-2-diazo-3-oxo-propionic acid (S)-1-dibenzylcarbamoyl-2-methyl-propyl ester 在
rhodium perfluorobutyramidate 作用下,
以
二氯甲烷 为溶剂,
反应 8.0h,
以89%的产率得到(S)-1-dibenzylcarbamoyl-2-methyl-propyl 5-ethoxy-1,2-dimethyl-3-oxo-7-oxa-2-aza-bicyclo[2.2.1]heptane-4-carboxylate