A copper(II)-catalyzed, sequential Michael–aldol reaction for the preparation of 1,2-dihydroquinolines
作者:Anna M. Wagner、Claire E. Knezevic、Jessica L. Wall、Victoria L. Sun、Joshua A. Buss、LeeAnn T. Allen、Anna G. Wenzel
DOI:10.1016/j.tetlet.2011.12.017
日期:2012.2
A copper(II)-catalyzed, sequential Michael addition-aldol condensation reaction of N-carboxybenzyl-protected aminobenzaldehyde with various α,β-unsaturated N-acyl pyrroles is described. Substrate scope was found to include both aryl and aliphatic N-acyl pyrroles as the Michael acceptors, and isolated product yields as high as 93% were observed. The use of acetonitrile as the reaction solvent proved
描述了N-羧基苄基保护的氨基苯甲醛与各种α,β-不饱和N-酰基吡咯的铜(II)催化的顺序迈克尔加成-羟醛缩合反应。发现底物范围包括芳基和脂族N-酰基吡咯作为迈克尔受体,并且观察到分离的产物产率高达93%。乙腈作为反应溶剂被证明对催化至关重要,它既起铜的不稳定配体的作用,又起使水解催化剂中毒最小化的作用。