... KGaA, Weinheim. Issue. Advanced Synthesis & Catalysis. ... How to Cite. Feroci, M., Chiarotto, I., Rossi, L. and Inesi, A. (2008), Activation of Elemental Sulfur by Electrogenerated Cyanomethyl Anion: Synthesis of Substituted 2-Aminothiophenes by the Gewald Reaction. ...