3-[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]propanoic acid 、
3-[[2-hydroxy-2-[2-[(2R,3R,4S,5S,6R)-3,4,5-tribenzoyloxy-6-(benzoyloxymethyl)oxan-2-yl]oxyethylimino]ethyl]amino]-N-[2-[(2R,3R,4S,5S,6R)-3,4,5-tribenzoyloxy-6-(benzoyloxymethyl)oxan-2-yl]oxyethyl]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72.9%的产率得到3-[3-[[1-hydroxy-3-[[2-hydroxy-2-[2-[(2R,3R,4S,5S,6R)-3,4,5-tribenzoyloxy-6-(benzoyloxymethyl)oxan-2-yl]oxyethylimino]ethyl]-[(2-methylpropan-2-yl)oxycarbonyl]amino]propylidene]amino]propanoyl-[2-hydroxy-2-[2-[(2R,3R,4S,5S,6R)-3,4,5-tribenzoyloxy-6-(benzoyloxymethyl)oxan-2-yl]oxyethylimino]ethyl]amino]-N-[2-[(2R,3R,4S,5S,6R)-3,4,5-tribenzoyloxy-6-(benzoyloxymethyl)oxan-2-yl]oxyethyl]propanimidic acid