methyl (1S,2S,5R,10R,11R,14S,16R)-2,7,7,10-tetramethyl-6,8-dioxapentacyclo[14.3.1.01,14.02,11.05,10]icos-17-ene-17-carboxylate 在
disodium hydrogenphosphate 、 bis(2-tert-butyl-3-hydroxy-4-methylphenyl)sulphide 、
间氯过氧苯甲酸 作用下,
以
二氯甲烷 为溶剂,
反应 8.0h,
以90%的产率得到methyl (1R,2S,5R,10R,11R,14S,16R,17S,19R)-2,7,7,10-tetramethyl-6,8,18-trioxahexacyclo[14.4.1.01,14.02,11.05,10.017,19]henicosane-17-carboxylate