Asymmetric hydrogenation of 2-substituted N-protected-indoles catalyzed by rhodium complexes of BINOL-derived phosphoramidites
作者:Nataša Mršić、Thomas Jerphagnon、Adriaan J. Minnaard、Ben L. Feringa、Johannes G. de Vries
DOI:10.1016/j.tetasy.2009.11.017
日期:2010.1
The rhodium-catalyzed asymmetric hydrogenation of 2-substituted N-protected-indoles using monodentate phosphoramidites as ligands was examined. Full conversion and 74% ee, were obtained with a catalyst based on PipPhos. The use of a catalytic amount of base is necessary for activity; best results were obtained with Cs2CO3.
研究了使用单齿亚磷酰胺作为配体的铑催化的2-取代的N-保护的吲哚的不对称氢化。用基于PipPhos的催化剂获得完全转化和74%ee。为了活性,必须使用催化量的碱。Cs 2 CO 3可获得最佳结果。