A method for forming a glycosidic linkage by: (a) contacting a glycoside bearing an anomeric sulfoxide group with a compound bearing a free hydroxyl group in the presence of an organic acid anhydride and a scavenger of sulfenyl esters; and (b) allowing a glycosylation reaction to proceed under conditions effective to produce the glycosidic linkage. In a preferred embodiment of the invention, the glycoside bearing an anomeric sulfoxide group is added to a mixture of the other reactants. In another preferred embodiment of the invention, a Lewis acid is also present in the reaction mixture.
This invention is further directed to a method for forming a glycosidic linkage by: (a) forming a solution comprising: a compound bearing a free hydroxyl group, and an organic acid anhydride; (b) adding to the solution a glycoside bearing an anomeric sulfoxide group; and (c) allowing a glycosylation reaction to proceed under conditions effective to produce the glycosidic linkage. In a preferred embodiment of the invention, a Lewis acid is present in the solution.
一种通过以下步骤形成糖苷键的方法:(a)在有机酸酐和
硫酰基酯清除剂存在下,将含有异构
硫氧化物基团的糖苷与含有自由羟基的化合物接触;(b)在有效条件下使糖基化反应进行,以产生糖苷键。在发明的首选实施例中,将含有异构
硫氧化物基团的糖苷加入到其他反应物的混合物中。在发明的另一种首选实施例中,还存在一种
路易斯酸于反应混合物中。本发明还涉及一种通过以下步骤形成糖苷键的方法:(a)形成一个溶液,包括:含有自由羟基的化合物和有机酸酐;(b)向该溶液中加入含有异构
硫氧化物基团的糖苷;(c)在有效条件下使糖基化反应进行,以产生糖苷键。在发明的首选实施例中,该溶液中存在一种
路易斯酸。