A New Method of α-Functionalization for Tertiary Amines by Nucleophilic Substitution of α-Siloxy Amines
作者:Norihiro Tokitoh、Renji Okazaki
DOI:10.1246/bcsj.61.735
日期:1988.3
α-Siloxy amines, which were easily prepared by “silicon Polonovski reaction” of tertiary amine N-oxides with trialkylsilyl trifluoromethanesulfonate, were treated with various nucleophiles to give the corresponding α-functionalized tertiary amines in moderate to good yields. This new method has the advantage that it enables the α-substitution of amines not only by alkyl groups but also by alkenyl and
α-甲硅烷氧基胺很容易通过叔胺 N-氧化物与三氟甲磺酸三烷基甲硅烷基酯的“硅波洛诺夫斯基反应”制备,用各种亲核试剂处理,以中等至良好的产率得到相应的 α-官能化叔胺。这种新方法的优点是,它不仅可以通过烷基,而且可以通过以 sp2 碳为反应中心的烯基和芳基对胺进行 α 取代,因为在偶极稳定的亲电取代中引入这些基团是困难的。 α-锂硫胺。除了有机金属化合物如格氏试剂和有机铝试剂外,三甲基氰化甲硅烷和甲硅烷基烯醇醚也可以在适当的路易斯酸存在下用作亲核试剂。