[(3S,5S,8R,9S,10S,12R,13R,16S,17S)-12-acetyloxy-17-[(3R,5S)-3-[tert-butyl(dimethyl)silyl]oxy-6-[tert-butyl(diphenyl)silyl]oxy-5-methyl-5-trimethylsilyloxyhex-1-ynyl]-16,17-dihydroxy-10,13-dimethyl-1,2,3,4,5,6,7,8,9,11,12,16-dodecahydrocyclopenta[a]phenanthren-3-yl] acetate 在
silver tetrafluoroborate 、
三苯基膦氯金 作用下,
以
四氢呋喃 为溶剂,
反应 12.0h,
以88%的产率得到[(1R,4S,8S,9R,10R,12S,13S,16S,18S)-10-acetyloxy-6-[(1R,3S)-1-[tert-butyl(dimethyl)silyl]oxy-4-[tert-butyl(diphenyl)silyl]oxy-3-methyl-3-trimethylsilyloxybutyl]-8-hydroxy-9,13-dimethyl-5-oxapentacyclo[10.8.0.02,9.04,8.013,18]icosa-2,6-dien-16-yl] acetate