2-diazo-N-<2-(3,4-dimethoxyphenyl)ethyl>-N-(2-methylhex-5-enoyl)malonamic acid ethyl ester 在
dirhodium(II) tetrakis(perfluorobutyrate) 作用下,
以
二氯甲烷 为溶剂,
以90%的产率得到9-<2-(3,4-dimethoxyphenyl)ethyl>-2-methyl-8-oxo-10-oxa-9-azatricyclo<5.2.1.0
1,5>decane-7-carboxylic acid ethyl ester