Acetic acid (2R,3S,4S,5R,6R)-4-acetoxy-2-[(3S,4S,5R,6R)-4-acetoxy-5-((S)-2,4-diacetoxy-butyrylamino)-2-hydroxy-6-methyl-tetrahydro-pyran-3-yloxy]-5-((S)-2,4-diacetoxy-butyrylamino)-6-methyl-tetrahydro-pyran-3-yl ester 在
4 A molecular sieve 、
三乙基硅基三氟甲磺酸酯 、
1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下,
以
二氯甲烷 为溶剂,
反应 1.08h,
生成
6-{(2S,3S,4S,5R,6R)-4-Acetoxy-5-((S)-2,4-diacetoxy-butyrylamino)-3-[(2R,3S,4S,5R,6R)-3,4-diacetoxy-5-((S)-2,4-diacetoxy-butyrylamino)-6-methyl-tetrahydro-pyran-2-yloxy]-6-methyl-tetrahydro-pyran-2-yloxy}-hexanoic acid methyl ester