(3R,3aR,5aS,6aR,7R,8R,10aR,10bS,10cS)-3-(tert-Butyl-dimethyl-silanyloxy)-10c-(tert-butyl-dimethyl-silanyloxymethyl)-8-methoxy-7,10a-dimethyl-tetradecahydro-5-oxa-acephenanthrylen-4-one 在
二异丁基氢化铝 作用下,
以
四氢呋喃 、
正己烷 为溶剂,
以62%的产率得到(3R,3aR,4S,5aS,6aR,7R,8R,10aR,10bS,10cS)-3-(tert-Butyl-dimethyl-silanyloxy)-10c-(tert-butyl-dimethyl-silanyloxymethyl)-8-methoxy-7,10a-dimethyl-tetradecahydro-5-oxa-acephenanthrylen-4-ol