methyl [(3R,5S,7R,8R)-7-{(1E,3E)-5-[(2S,3S,5R,6R)-5-{[(2Z,4S)-4-(acetyloxy)pent-2-enoyl]amino}-3,6-dimethyltetrahydro-2H-pyran-2-yl]-3-methylpenta-1,3-dien-1-yl}-8-{[tert-butyl(dimethyl)silyl]oxy}-1,6-dioxaspiro[2.5]oct-5-yl]acetate 在
甲醇 、
potassium carbonate 作用下,
反应 1.0h,
以52%的产率得到methyl [(3R,5S,7R,8R)-8-{[tert-butyl(dimethyl)silyl]oxy}-7-{(1E,3E)-5-[(2S,3S,5R,6R)-5-{[(2Z,4S)-4-hydroxypent-2-enoyl]amino}-3,6-dimethyltetrahydro-2H-pyran-2-yl]-3-methylpenta-1,3-dien-1-yl}-1,6-dioxaspiro[2.5]oct-5-yl]acetate