(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
trityl tetrafluoroborate 作用下,
以
二氯甲烷 为溶剂,
反应 0.5h,
以97%的产率得到(3S,3aS,5aR,6aS,7S,8S,10aS,10bR,10cR)-10c-(tert-Butyl-dimethyl-silanyloxymethyl)-3-hydroxy-8-methoxy-7,10a-dimethyl-tetradecahydro-5-oxa-acephenanthrylen-4-one