(4S,6R,8S,10R,13S)-4-[[(1S,2S,3S,5S,7R)-2-hydroxy-3-methyl-7-(phenylmethoxymethyl)-6,8-dioxabicyclo[3.2.1]octan-5-yl]methyl]-10-[2-[(4-methoxyphenyl)methoxy]ethyl]-13-methyl-5,7,9-trioxadispiro[5.1.58.26]pentadecan-13-ol 在
2,6-二甲基吡啶 、 camphor-10-sulfonic acid 作用下,
以
二氯甲烷 为溶剂,
反应 25.0h,
生成 tert-butyl-[[(1R,2S,3S,5S,7R)-5-[[(4S,6S,8S,10R,13S)-13-[tert-butyl(dimethyl)silyl]oxy-10-[2-[(4-methoxyphenyl)methoxy]ethyl]-13-methyl-5,7,9-trioxadispiro[5.1.58.26]pentadecan-4-yl]methyl]-3-methyl-7-(phenylmethoxymethyl)-6,8-dioxabicyclo[3.2.1]octan-2-yl]oxy]-dimethylsilane