Polymer-Supported Organocatalysts: Asymmetric Reduction of Imines with Trichlorosilane Catalyzed by an Amino Acid-Derived Formamide Anchored to a Polymer
作者:Andrei V. Malkov、Marek Figlus、Pavel Kočovský
DOI:10.1021/jo800094q
日期:2008.6.1
Asymmetricreduction of ketimines 1a−e with trichlorosilane can be catalyzed by the N-methylvaline-derived Lewis basic formamideanchored to a polymeric support (5a and 5b) with good enantioselectivity (≤82% ee) and low catalyst loading (typically 15 mol %) at room temperature. This protocol represents a considerable simplification of the isolation procedure and is particularly suitable for a parallel