(4-deoxy-α-L-threo-hex-4-enopyranosyluronic acid)-(1->4)-(β-D-glucopyranosyluronic acid)-(1->4)-(D-glucopyranuronic acid) 、
正丁醇 在
四氯化锡 作用下,
反应 0.17h,
以41%的产率得到butyl (2R,3R)-4-butoxy-2-(((2S,3S,4R,5R,6R)-6-(((2S,3S,4R,5R)-6-butoxy-2-(butoxycarbonyl)-4,5-dihydroxytetrahydro-2H-pyran-3-yl)oxy)-2-(butoxycarbonyl)-4,5-dihydroxytetrahydro-2H-pyran-3-yl)oxy)-3-hydroxy-3,4-dihydro-2H-pyran-6-carboxylate