Dimethyl disulfide reacts with triflic anhydride to provide a highly reactive electrophile. Various thioglycosides, differing in their thio aglycons, carbohydrate units, and protecting group pattern, were activated with Me2S2-Tf2O in the presence of different glycosyl acceptors. The reactions proceeded at low temperatures within a short time, affording oligosaccharides in high yields both on primary
二甲基二硫化物与
三氟甲磺酸酐反应以提供高反应活性的亲电子试剂。在存在不同糖基受体的情况下,用Me2S2-Tf2O激活了各种
硫代糖苷,它们的
硫苷元,
糖类单元和保护基团模式不同。反应在短时间内在低温下进行,伯羟基和仲羟基均以高收率得到
寡糖。武装和解除武装的糖基供体被同样有效地激活。