(S)-4-(tert-Butyl-diphenyl-silanyloxy)-5-methoxy-pentanethioic acid O-[(3S,5S,8R,9S,10S,13R,14S,17R)-17-((R)-1,5-dimethyl-hexyl)-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-3-yl] ester 在
2,4,6-三甲基吡啶 、 silver tetrafluoroborate 、
四丁基氟化铵 、
三乙基硼氢化锂 作用下,
以
四氢呋喃 、
二氯甲烷 为溶剂,
反应 47.0h,
生成 (S)-2-[(3S,5S,8R,9S,10S,13R,14S,17R)-17-((R)-1,5-Dimethyl-hexyl)-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-3-yloxy]-5-methoxymethyl-tetrahydro-furan