The 2-thio- or 2-selenoglycosides of N-acetylneuraminic acid methyl ester were transformed by successive treatment with dimethyl(methylthio)sulfonium triflate (DMTST) and 1, 8-diazabicyclo[5.4.0]-7-undecene (DBU) to give the correponding methyl 2-deoxy-2, 3-didehydroneuraminates in excellent yields. Their acids and thier analogues are sialidase inhibitors of pharmaceutical interest.
                                    N-acetyl neuraminic acid methyl eSTer 的 2-thio- 或 2-selenoglycosides 通过三酸二甲基(甲
硫基)锍(
DMTST)和 1,8-二
氮杂双环[5.4.0]-7-十一烯(
DBU)的连续处理进行转化,以优异的产率得到相应的 2-脱氧-2,3-二脱氢酮酰胺甲酯。它们的酸和类似物是具有医药价值的
硅烷化酶
抑制剂。