(3Z,9E)-(1R,7S,11S,17R)-11-(tert-Butyl-dimethyl-silanyloxy)-7-[(E)-(R)-1-hydroxy-3-((S)-4-methyl-3,6-dihydro-2H-pyran-2-yl)-allyl]-13-methylene-6,21-dioxa-bicyclo[15.3.1]henicosa-3,9,19-trien-5-one 在
草酰氯 、
potassium tri-sec-butyl-borohydride 、
二甲基亚砜 、
三乙胺 作用下,
以
四氢呋喃 、
二氯甲烷 为溶剂,
生成 (3Z,9E)-(1R,7S,11S,17R)-11-(tert-Butyl-dimethyl-silanyloxy)-7-[(E)-(S)-1-hydroxy-3-((S)-4-methyl-3,6-dihydro-2H-pyran-2-yl)-allyl]-13-methylene-6,21-dioxa-bicyclo[15.3.1]henicosa-3,9,19-trien-5-one