Asymmetric imine isomerisation in the enantioselective synthesis of chiral amines from prochiral ketones
作者:Johannes G.H Willems、Johannes G de Vries、Roeland J.M Nolte、Binne Zwanenburg
DOI:10.1016/0040-4039(95)00641-o
日期:1995.5
An asymmetric catalytic synthesis of chiral amines using a chiral base catalysed [1,3]-proton shift reaction of imines is described. The isomerisation reaction of N-benzylimines 2a-b derived from prochiral ketones (benzylacetone, acetophenone) and p-substituted benzylamines, is catalysed by chiral alcohols and aminoalcohols 5–12 and gives enantiomerically enriched (up to 44% e.e.) N-benzylidene derivatives
描述了使用手性碱催化亚胺的[1,3]-质子转移反应的手性胺的不对称催化合成。前手性酮(苄基丙酮,苯乙酮)和对位取代的苄胺衍生的N-苄基亚胺2a-b的异构化反应,被手性醇和氨基醇5-12催化,得到对映体富集(最多ee为44%)的N-亚苄基衍生物3a-b。所得产物3a-b易于水解成它们相应的胺4a-b。