Unexpected alkoxyl migration in the reaction of silyl ketene acetals with p-toluenesulfonyl azide
作者:Yong Xu、Shizheng Zhu
DOI:10.1016/s0040-4020(01)00283-6
日期:2001.4
The reaction of p-toluenesulfonyl azides with several silyl ketene acetals has been investigated. 1-Trimethylsilyloxy-ethylene reacted with TsN3 to give a good yield of N-p-toluenesulfonyl substituted glycinates exclusively. However, during the reaction of 1-trimethylsilyloxy-propene with TsN3, an unexpected alkoxyl migration occurred to give N-acylsulfonyl amides; other products, N-p-toluenesulfonyl
已经研究了对甲苯磺酰叠氮化物与几种甲硅烷基烯酮缩醛的反应。1-三甲基硅烷氧乙烯具有TSN反应3,得到良好收率的ñ - p甲苯磺酰专门取代的甘氨酸。然而,在1-三甲基甲硅烷氧基-丙烯与TsN 3反应的过程中,发生了意外的烷氧基迁移,生成了N-酰基磺酰基酰胺。其它产品,ñ - p也得到甲苯磺酰氮丙啶基取代。在二烷基取代的甲硅烷基乙烯酮缩醛的情况下,形成了三种产物,即氮丙啶,α-氨基酯和N-酰基磺酰基酰胺。讨论了烷氧基迁移的机理。