Asymmetric synthesis of β-amino alcohols by the transfer hydrogenation of α-keto imines
作者:Agnieszka Tafelska-Kaczmarek、Andrzej Prewysz-Kwinto、Krzysztof Skowerski、Katarzyna Pietrasiak、Anna Kozakiewicz、Marek Zaidlewicz
DOI:10.1016/j.tetasy.2010.07.004
日期:2010.9
The asymmetric transfer hydrogenation of representative aryl and benzofuranyl 2-tert-butylaminoethanones with formic acid-triethylamine, catalyzed by RhCl[(R,R)-T5DPEN](C5Me5), produced the corresponding beta-tert-butylamino alcohols in 97-99% ee. A short asymmetric synthesis of (R)-bufuralol, a potent beta-adrenergic receptor antagonist, is described. This approach to beta-amino alcohols from ketones circumvents the halogenation-reduction-amination sequence. (C) 2010 Elsevier Ltd. All rights reserved.