Role of Noncovalent Interactions in the Enantioselective Reduction of Aromatic Ketimines with Trichlorosilane
作者:Andrei V. Malkov、Andrea Mariani、Kenneth N. MacDougall、Pavel Kočovský
DOI:10.1021/ol049213+
日期:2004.6.1
[reaction: see text] Asymmetric reduction of ketimines 1 with trichlorosilane can be catalyzed by a new N-methyl L-valine derived Lewis basic organocatalyst, such as 4d, with high enantioselectivity. The structure-reactivity investigation suggests hydrogen bonding and arene-arene interactions between the catalyst and the incoming imine as the main factor determining the enantiofacial selectivity.