6-[3-[(2-methylpropan-2-yl)oxycarbonyl-[2-oxo-2-[2-[(2R,3R,4S,5S,6R)-3,4,5-tribenzoyloxy-6-(benzoyloxymethyl)oxan-2-yl]oxyethylamino]ethyl]amino]propanoylamino]hexanoic acid 、 3-[[2-hydroxy-2-[2-[(2R,3R,4S,5S,6R)-3,4,5-tribenzoyloxy-6-(benzoyloxymethyl)oxan-2-yl]oxyethylimino]ethyl]amino]-N-[3-[[2-hydroxy-2-[2-[(2R,3R,4S,5S,6R)-3,4,5-tribenzoyloxy-6-(benzoyloxymethyl)oxan-2-yl]oxyethylimino]ethyl]-[3-hydroxy-3-[2-[(2R,3R,4S,5S,6R)-3,4,5-tribenzoyloxy-6-(benzoyloxymethyl)oxan-2-yl]oxyethylimino]propyl]amino]-3-oxopropyl]propanimidic acid 在
氰基磷酸二乙酯 、
三乙胺 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 16.0h,
以87.8%的产率得到[(2R,3S,4S,5R,6R)-3,4,5-tribenzoyloxy-6-[2-[3-[3-[3-[6-[3-[(2-methylpropan-2-yl)oxycarbonyl-[2-oxo-2-[2-[(2R,3R,4S,5S,6R)-3,4,5-tribenzoyloxy-6-(benzoyloxymethyl)oxan-2-yl]oxyethylamino]ethyl]amino]propanoylamino]hexanoyl-[2-oxo-2-[2-[(2R,3R,4S,5S,6R)-3,4,5-tribenzoyloxy-6-(benzoyloxymethyl)oxan-2-yl]oxyethylamino]ethyl]amino]propanoylamino]propanoyl-[2-oxo-2-[2-[(2R,3R,4S,5S,6R)-3,4,5-tribenzoyloxy-6-(benzoyloxymethyl)oxan-2-yl]oxyethylamino]ethyl]amino]propanoylamino]ethoxy]oxan-2-yl]methyl benzoate