Abstract 5-Alkyl/aryl/hetaryl-4-cyano-3(2H)-furanones undergo ring-cleavage/recyclization in the presence of water under mild conditions [MOH (M = Na, K), aqueous ethanol, 20–25 °C] to afford 4-acyl/aroyl/hetaroyl-5-amino-3(2Н)-furanones in 75–99% yields. 5-Alkyl/aryl/hetaryl-4-cyano-3(2H)-furanones undergo ring-cleavage/recyclization in the presence of water under mild conditions [MOH (M = Na, K)
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 Claisencondensation of the ketoacetonitrile tautomer with ester functional group.