乙酸酐 、 6-[(2R,3R,4S,5R,6R)-3,5-Bis-((2S,3R,4R,5S,6R)-3-amino-4,5-dihydroxy-6-hydroxymethyl-tetrahydro-pyran-2-yloxy)-4-hydroxy-6-hydroxymethyl-tetrahydro-pyran-2-yloxy]-hexanoic acid methyl ester 在
吡啶 、
4-二甲氨基吡啶 、 H
(1+) resin 、
三乙胺 作用下,
生成
6-[(2R,3R,4S,5S,6R)-4-Acetoxy-6-acetoxymethyl-3,5-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