A Domino Reaction of α,β-Acetylenic γ-Hydroxy Nitriles with Arenecarboxylic Acids: An Unexpected Facile Shortcut to 4-Cyano-3(2<i>H</i>)-furanones
作者:Boris A. Trofimov、Olesya A. Shemyakina、Anastasiya G. Mal’kina、Igor’ A. Ushakov、Olga N. Kazheva、Grigorii G. Alexandrov、Oleg A. Dyachenko
DOI:10.1021/ol1011532
日期:2010.7.16
67−86% yield. The reaction is triggered by the addition of an arenecarboxylic acid to a triple bond, followed by the domino reaction sequence: intramolecular transesterification−enol formation and Claisen condensation of the ketoacetonitrile tautomer with ester functional group.
α,β-炔属γ-羟基腈与芳烃羧酸(Et 3 N,MeCN,20-25°C,48 h)的意想不到的简便多米诺反应,在67-86中提供4-氰基-3(2 H)-呋喃酮% 屈服。该反应是通过将芳烃羧酸加成至三键而引发的,然后是多米诺骨牌反应序列:分子内酯交换-烯醇的形成和酮乙腈互变异构体与酯官能团的克莱森缩合。