乙酸酐 、
[(2R,3S,4R,5S,6R)-2-[(3aR,5S,6S,6aR)-6-methoxy-2,2-dimethyl-3a,5,6,6a-tetrahydrofuro[2,3-d][1,3]dioxol-5-yl]-4,5-dihydroxy-6-methoxyoxan-3-yl] acetate 以
吡啶 为溶剂,
生成 [(2R,3R,4S,5S,6R)-2-[(3aR,5S,6S,6aR)-6-methoxy-2,2-dimethyl-3a,5,6,6a-tetrahydrofuro[2,3-d][1,3]dioxol-5-yl]-4,5-diacetyloxy-6-methoxyoxan-3-yl] acetate