乙酸酐 、 (S)-2-{(4R,5R,6R)-6-[(R)-2-(tert-Butyl-diphenyl-silanyloxy)-1-methyl-ethyl]-2,2,5-trimethyl-[1,3]dioxan-4-yl}-2-[(4R,5R,6S)-2,2,5-trimethyl-6-((S)-1-methyl-allyl)-[1,3]dioxan-4-yl]-ethanol 在
吡啶 作用下,
生成
Acetic acid (S)-2-{(4R,5R,6R)-6-[(R)-2-(tert-butyl-diphenyl-silanyloxy)-1-methyl-ethyl]-2,2,5-trimethyl-[1,3]dioxan-4-yl}-2-[(4R,5R,6S)-2,2,5-trimethyl-6-((S)-1-methyl-allyl)-[1,3]dioxan-4-yl]-ethyl ester