Phosphane-Catalyzed Knoevenagel Condensation: A Facile Synthesis ofα-Cyanoacrylates andα-Cyanoacrylonitriles
作者:Jhillu S. Yadav、Basi V. Subba Reddy、Ashok K. Basak、Boddapati Visali、Akkirala Venkat Narsaiah、Kommu Nagaiah
DOI:10.1002/ejoc.200300513
日期:2004.2
Triphenylphosphane (TPP) has been utilized as a novel and efficient catalyst for the Knoevenagel condensation of aldehydes with acidic methylene compounds such as ethyl cyanoacetate and malononitrile to afford substituted olefins. The reaction proceeds smoothly under mild and solvent-free conditions and the products are obtained in excellent yields with an E-geometry. This method is applicable for
三苯基膦 (TPP) 已被用作一种新型有效的催化剂,用于醛与酸性亚甲基化合物(如氰乙酸乙酯和丙二腈)的 Knoevenagel 缩合反应,得到取代的烯烃。该反应在温和且无溶剂的条件下顺利进行,产物以极好的收率获得,具有 E 几何。该方法适用于多种醛,包括芳香族、脂肪族和杂环底物。微波辐射已被用于提高反应速率和提高产率。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)