dl-(1R*,5S*,7R*)-5-ethoxycarbonyl-1-(3',4'-methylenedioxyphenyl)-7-vinyl-2-azabicyclo<3.2.0>heptane-3,4-dione 、 alkaline earth salt of/the/ methylsulfuric acid 以
二氯甲烷 为溶剂,
反应 20.0h,
以100%的产率得到(1S,6S)-8-Benzo[1,3]dioxol-5-yl-6-ethoxy-9-oxo-7-aza-bicyclo[4.2.1]nona-3,7-diene-1-carboxylic acid ethyl ester