(4S)-4-benzyl-3-[(2S,3R,4R)-6-[(4R,6S)-6-[[tert-butyl(diphenyl)silyl]oxymethyl]-2,2-dimethyl-1,3-dioxan-4-yl]-2-ethyl-3-hydroxy-4-methylhexanoyl]-1,3-oxazolidin-2-one 、
乙酸酐 在
4-二甲氨基吡啶 、
三乙胺 作用下,
以
二氯甲烷 为溶剂,
反应 4.0h,
以95%的产率得到[(3R,4R,5S)-5-[(4S)-4-benzyl-2-oxo-1,3-oxazolidine-3-carbonyl]-1-[(4R,6S)-6-[[tert-butyl(diphenyl)silyl]oxymethyl]-2,2-dimethyl-1,3-dioxan-4-yl]-3-methylheptan-4-yl] acetate