(1S,4S)-1-[(S)-2,2-Bis-(4-methoxy-phenyl)-[1,3]dioxolan-4-yl]-4-(tert-butyl-dimethyl-silanyloxy)-7-oxa-bicyclo[2.2.1]hepta-2,5-diene-2,3-dicarboxylic acid dimethyl ester 在
palladium on activated charcoal
氢气 作用下,
以
乙酸乙酯 为溶剂,
以81%的产率得到(1S,4S)-1-[(S)-2,2-Bis-(4-methoxy-phenyl)-[1,3]dioxolan-4-yl]-4-(tert-butyl-dimethyl-silanyloxy)-7-oxa-bicyclo[2.2.1]hept-2-ene-2,3-dicarboxylic acid dimethyl ester