N-[1-[(2R,4S,5R,6S,7R)-7-[[tert-butyl(dimethyl)silyl]oxymethyl]-4,5,6-trihydroxyoxepan-2-yl]-2-oxopyrimidin-4-yl]acetamide 、
乙酸酐 在
吡啶 作用下,
以72%的产率得到[(2R,4S,5R,6R,7R)-2-(4-acetamido-2-oxopyrimidin-1-yl)-5,6-diacetyloxy-7-[[tert-butyl(dimethyl)silyl]oxymethyl]oxepan-4-yl] acetate