甲基三苯基溴化膦 、 在
potassium tert-butylate 作用下,
以
四氢呋喃 为溶剂,
以64%的产率得到(1R,3R,7R,10R,11R,14S,20R,21R,26S,27S,28R,29R,30R)-21-[(2S,3R)-4-hydroxy-2,3-dimethylbutyl]-24-(methoxymethoxymethyl)-11,30-dimethyl-16-methylidene-32,33,34,35,36-pentaoxaheptacyclo[25.4.1.11,28.13,7.17,10.110,14.021,26]hexatriacont-24-ene-11,20,29-triol