(2R,3R,4R,5S,6S)-5-[(2S,3R,4S,5R,6R)-5-[tert-butyl(dimethyl)silyl]oxy-3-iodo-4-methoxy-6-methyloxan-2-yl]oxy-3-iodo-4,6-dimethyloxane-2,4-diol 、
乙酸酐 在
4-二甲氨基吡啶 作用下,
以
吡啶 为溶剂,
反应 0.75h,
生成
acetic acid (3R,4R,5S,6S)-5-[(2S,3R,4S,5R,6R)-5-(tert-butyl-dimethyl-silanyloxy)-3-iodo-4-methoxy-6-methyl-tetrahydropyran-2-yloxy]-4-hydroxy-3-iodo-4,6-dimethyl-tetrahydropyran-2-yl ester 、 acetic acid (3R,4R,5S,6S)-5-[(2S,3R,4S,5R,6R)-5-(tert-butyl-dimethyl-silanyloxy)-3-iodo-4-methoxy-6-methyl-tetrahydropyran-2-yloxy]-4-hydroxy-3-iodo-4,6-dimethyl-tetrahydropyran-2-yl ester