Cp∗Ir-catalyzed N-alkylation of amines with alcohols. A versatile and atom economical method for the synthesis of amines
作者:Ken-ichi Fujita、Youichiro Enoki、Ryohei Yamaguchi
DOI:10.1016/j.tet.2007.11.083
日期:2008.2
catalytic system is applicable to the N-alkylation of both primary and secondary amines, and only harmless water is produced as co-product. A wide variety of secondary and tertiary amines can be synthesized with high atom economy under mild and less-toxic conditions. One-pot sequential N-alkylation leading to tertiary amines bearing three different substituents is also described.
已开发出一种由[Cp ∗ IrCl 2 ] 2 / NaHCO 3(Cp ∗ =五甲基环戊二烯基)组成的通用且高度原子经济的催化体系,用于使用伯醇和仲醇作为烷基化试剂进行胺的N-烷基化。例如,当等摩尔量的苯胺和苯甲醇在[Cp ∗ IrCl 2 ] 2(1.0 mol%Ir)和NaHCO 3(1.0 mol%)在甲苯中的存在下,在110°C下反应得到N-苄基苯胺,产率94%。本催化体系适用于伯胺和仲胺的N-烷基化,并且仅产生无害的水作为副产物。在温和且毒性较小的条件下,可以以高原子经济性合成多种仲胺和叔胺。还描述了导致带有三个不同取代基的叔胺的一锅顺序N-烷基化。