Activation of Elemental Sulfur by Electrogenerated Cyanomethyl Anion: Synthesis of Substituted 2??Aminothiophenes by the Gewald Reaction

M Feroci, I Chiarotto, L Rossi…

Index: Feroci, Marta; Chiarotto, Isabella; Rossi, Leucio; Inesi, Achille Advanced Synthesis and Catalysis, 2008 , vol. 350, # 17 p. 2740 - 2746

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Citation Number: 32

Abstract

Abstract The activation of elemental sulfur (S 8) has been achieved by means of electrogenerated cyanomethyl anion [easily obtained by galvanostatic reduction from acetonitrile/tetraethylammonium hexafluorophosphate (MeCN-Et 4 NPF 6)]. The “activated” sulfur reacted with ylidenemalononitriles to give substituted 2-aminothiophenes in very high yields. This variation of the Gewald reaction has been carried out using only catalytic ...