[(2R,4S,6R,8S,10S)-2-[(3S,4R,5S,6S)-4-hydroxy-6-[(4-methoxyphenyl)methoxy]-3,5-dimethyl-2-oxooctyl]-8-[2-[(4-methoxyphenyl)methoxy]ethyl]-4-methyl-4-triethylsilyloxy-1,7-dioxaspiro[5.5]undecan-10-yl] acetate 在
4-甲基苯磺酸吡啶 、
二异丁基氢化铝 作用下,
以
四氢呋喃 、
二氯甲烷 为溶剂,
生成 (2S,4S,6R,8S,10S)-2-[2-(4-Methoxy-benzyloxy)-ethyl]-8-{(4S,5R,6R)-6-[(1R,2S)-2-(4-methoxy-benzyloxy)-1-methyl-butyl]-2,2,5-trimethyl-[1,3]dioxan-4-ylmethyl}-10-methyl-10-triethylsilanyloxy-1,7-dioxa-spiro[5.5]undecan-4-ol