乙酸酐 、
(2R,3S,4R,5S,6S)-5-azido-3-phenylmethoxy-2-(phenylmethoxymethyl)-6-[[(1S,2R,6R,8R,9S)-4,4,11,11-tetramethyl-3,5,7,10,12-pentaoxatricyclo[7.3.0.02,6]dodecan-8-yl]methoxy]oxan-4-ol 在
吡啶 作用下,
以98%的产率得到[(2R,3S,4R,5S,6S)-5-azido-3-phenylmethoxy-2-(phenylmethoxymethyl)-6-[[(1S,2R,6R,8R,9S)-4,4,11,11-tetramethyl-3,5,7,10,12-pentaoxatricyclo[7.3.0.02,6]dodecan-8-yl]methoxy]oxan-4-yl] acetate