Enantioselective Conjugate Addition of Aromatic Amines toN-Alkenoyloxazolidinones Catalyzed by Iodido(binaphtholato)samarium
作者:Iréna Reboule、Richard Gil、Jacqueline Collin
DOI:10.1002/ejoc.200700861
日期:2008.1
Iodido(binaphtholato)samarium catalyzes the Michael addition of aromatic amines to N-alkenoyloxazolidinones affording β-amino acid derivatives with enantiomeric excesses of up to 88 %. A study of the effect of temperature on the asymmetric induction revealed an isoinversion in two reactions. The observation of a non-linear effect suggests an equilibrium between several active species including dimers
碘(联萘)钐催化芳香胺与 N-链烯酰恶唑烷酮的迈克尔加成反应,提供对映体过量高达 88% 的 β-氨基酸衍生物。对温度对不对称诱导的影响的研究揭示了两个反应中的同相转化。非线性效应的观察表明包括二聚体在内的几种活性物质之间存在平衡。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)