(3S,4S,6S,7R,8S,10S)-3,4,10-tris[[tert-butyl(dimethyl)silyl]oxy]-13-[(4-methoxyphenyl)methoxy]-6-methyl-1-phenylmethoxytetradecane-7,8-diol 、
2,2-二甲氧基丙烷 在
camphor-10-sulfonic acid 作用下,
以89%的产率得到[(2S)-1-[(4S,5R)-5-[(2S,4S,5S)-4,5-bis[[tert-butyl(dimethyl)silyl]oxy]-7-phenylmethoxyheptan-2-yl]-2,2-dimethyl-1,3-dioxolan-4-yl]-5-[(4-methoxyphenyl)methoxy]hexan-2-yl]oxy-tert-butyl-dimethylsilane