An Expedient Three-Component Approach to the Synthesis of α,α-Disubstituted Amines under Barbier-like Conditions
作者:Erwan Le Gall、Stéphane Sengmany、Michel Troupel
DOI:10.1055/s-2008-1072582
日期:——
A series of α,α-disubstituted amines such as diarylmethylamines, 1,2-diarylethylamines, and amino esters have been prepared in acetonitrile using a simple and expedient three-component Mannich-type procedure involving organic halides, aldehyde derivatives, and amines. Reactions are conducted under Barbier-like conditions using simple organic halides and zinc dust for the in situ generation of organozinc reagents.
A highly efficient, three-component one-pot benzylation and allylation of aromatic and aliphatic aldehydes and amines affords the corresponding homobenzylamines and homoallylamines in good to excellent yield. The procedure is lauded by its simplicity and manipulability.
Three-Component Synthesis of α-Branched Amines under Barbier-like Conditions
作者:Erwan Le Gall、Caroline Haurena、Stéphane Sengmany、Thierry Martens、Michel Troupel
DOI:10.1021/jo901704s
日期:2009.10.16
An array of alpha-branched amines has been prepared by using an expedient three-component Mannich-type reaction among organic halides, aldehyde derivatives, and amines. The experimental procedure, which is characterized by its simplicity, employs zinc dust for the in situ generation of organozinc reagents. We show that this Barbier-like protocol constitutes a useful entry to diaryl-methylamines, 1,2-diarylethylamines, alpha- or beta-amino esters, benzylamines, and beta-arylethylamines.