1,1′-Binaphthyldiamine-Based Lewis Bases as Readily Available and Efficient Organocatalysts for the Reduction of<i>N</i>-Aryl and<i>N</i>-Alkyl Ketimines
作者:Stefania Guizzetti、Maurizio Benaglia、Giuseppe Celentano
DOI:10.1002/ejoc.200900524
日期:2009.8
development of simple, low-cost, efficient, and sustainable routes to enantiomerically pure amines is a topic of extraordinary interest, specially in view of future industrial applications. In this context, we wish to report a chemical and stereochemical efficient synthesis of chiral amines through the Lewis base activated trichlorosilane reduction of ketimines. An organocatalyst, easily prepared in a single
开发对映异构纯胺的简单、低成本、高效和可持续的路线是一个非常有趣的话题,特别是考虑到未来的工业应用。在这种情况下,我们希望通过路易斯碱活化的三氯硅烷还原酮亚胺来报告手性胺的化学和立体化学有效合成。有机催化剂,通过吡啶甲酸和市售的 1,1'-联萘二胺的缩合很容易在一个步骤中制备,是这种无金属方法的关键要素,它允许以高产率合成手性仲胺和伯胺,并且立体选择性。值得注意的是,此类催化剂能够促进 N-烷基酮亚胺的还原,通常以定量收率和高达 87% 的对映选择性;值得一提的是,对于此类转化,迄今为止仅报道了一种其他有机催化系统。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)