[(2S,3R,5R,5aS,6aR,8S,10S,11R,12aS,13aR)-3,5-Bis-benzyloxy-2-(2-benzyloxy-ethyl)-10-(tert-butyl-dimethyl-silanyloxy)-5a,8-dimethyl-tetradecahydro-1,6,12-trioxa-cyclohepta[4,5]benzo[1,2]cycloocten-11-yl]-methanol 在
咪唑 、
碘 、
三苯基膦 作用下,
以
四氢呋喃 为溶剂,
以94%的产率得到[(2S,3R,5R,5aS,6aR,8S,10S,11S,12aS,13aR)-3,5-Bis-benzyloxy-2-(2-benzyloxy-ethyl)-11-iodomethyl-5a,8-dimethyl-tetradecahydro-1,6,12-trioxa-cyclohepta[4,5]benzo[1,2]cycloocten-10-yloxy]-tert-butyl-dimethyl-silane