作者:Ken-ichi Fujita、Atsuo Komatsubara、Ryohei Yamaguchi
DOI:10.1016/j.tet.2009.03.002
日期:2009.5
New atom-economical catalytic systems consisting of [Cp∗IrCl2]2/NaOAc (Cp∗=pentamethylcyclopentadienyl) for the N-alkylation of carbamates and amides using alcohols as alkylating agents under solvent-free conditions have been developed. For example, the reaction of n-butyl carbamate with benzyl alcohol in the presence of [Cp∗IrCl2]2 (5.0 mol % Ir) and NaOAc (5.0 mol %) at 130 °C under the absence of
已经开发出由[Cp ∗ IrCl 2 ] 2 / NaOAc(Cp ∗ =五甲基环戊二烯基)组成的新型经济型催化体系,用于在无溶剂条件下使用醇作为烷基化剂对氨基甲酸酯和酰胺进行N烷基化。例如,在[Cp ∗ IrCl 2 ] 2(5.0 mol%Ir)和NaOAc(5.0 mol%)存在下,氨基甲酸正丁酯与苯甲醇在130°C下在无溶剂存在下反应,得到正丁基ñ-氨基甲酸苄酯的产率为94%。本催化体系不仅适用于氨基甲酸酯而且适用于酰胺,并且仅产生无害的水作为副产物。