6-[(4aR,6R,7R,8S,8aS)-7,8-Bis-((2S,3R,4R,5S,6R)-4,5-diacetoxy-6-acetoxymethyl-3-acetylamino-tetrahydro-pyran-2-yloxy)-2-phenyl-hexahydro-pyrano[3,2-d][1,3]dioxin-6-yloxy]-hexanoic acid methyl ester 在
吡啶 、
对甲苯磺酸 作用下,
以
甲醇 为溶剂,
反应 16.25h,
生成
6-[(2R,3R,4S,5S,6R)-5-Acetoxy-6-acetoxymethyl-3,4-bis-((2S,3R,4R,5S,6R)-4,5-diacetoxy-6-acetoxymethyl-3-acetylamino-tetrahydro-pyran-2-yloxy)-tetrahydro-pyran-2-yloxy]-hexanoic acid methyl ester