Mannosylation of several glycosyl acceptors with a novel mannosyl donor having the 6-nitro-2-benzothiazoate function at an anomeric position proceeded smoothly in the presence of a catalytic amount of tetrakis(pentafluorophenyl)boric acid [HB(C6F5)4] to afford the corresponding disaccharides in high yields with good to high β-stereoselectivities.
在一定量的四(
五氟苯基)
硼酸[HB(
C6F5)4]催化下,几种糖基受体与一种新型
甘露糖基供体的
甘露糖基化反应顺利进行,得到相应的二糖,产率高、β-严格选择性好。