[(1R,2S,4S,5'R,6R,7S,8R,9S,12S,13S,16S,18S)-5',7,9,13-tetramethylspiro[5-oxapentacyclo[10.8.0.02,9.04,8.013,18]icosane-6,2'-oxane]-16-yl] methanesulfonate 在
过氧乙酸 、
硫酸 、
碘 作用下,
以
溶剂黄146 为溶剂,
以78%的产率得到[(1R,2S,4S,7S,8R,9S,12S,13S,16S,18S)-7,9,13-trimethyl-6-oxo-5-oxapentacyclo[10.8.0.02,9.04,8.013,18]icosan-16-yl] methanesulfonate