Synthesis of Aliphatic (E)-α,β-Unsaturated Amides with High Diastereoselectivity fromα,β-Epoxyamides Promoted by SmI2/HMPA
作者:José M. Concellón、Eva Bardales
DOI:10.1002/ejoc.200300641
日期:2004.4
Synthesis of aliphatic (E)-α,β-unsaturated amides 2, in which the C=C bond is di- or trisubstituted, is achieved by using samarium diiodide and HMPA. The starting compounds 1 were easily prepared by the reaction of the corresponding lithium or potassium enolates of α-chloroamides with aldehydes. A mechanism to explain this process is proposed. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany
通过使用二碘化钐和 HMPA 合成脂肪族 (E)-α,β-不饱和酰胺 2,其中 C=C 键被二或三取代。起始化合物 1 很容易通过相应的 α-氯酰胺的烯醇锂或烯醇钾与醛反应来制备。提出了一种解释这一过程的机制。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)