(2S)-3,3-dimethyl-1-[(4S,6S,8R,11S)-8-methyl-11-propan-2-yl-1,5-dioxaspiro[5.5]undecan-4-yl]pent-4-en-2-ol 在
吡啶 、 sodium tetrahydroborate 作用下,
以
二氯甲烷 为溶剂,
生成 Chloro-acetic acid (S)-3-hydroxy-4-((2S,7R,10R)-7-isopropyl-10-methyl-1,5-dioxa-spiro[5.5]undec-2-yl)-2,2-dimethyl-butyl ester