Journal für Praktische Chemie

Elektrochemische Synthese von (E)??Thiokohlensäure??S??ethenyl??O??ethyl??diestern

U Hess, M Schulze

Index: Hess, U.; Schulze, M. Journal fuer Praktische Chemie (Leipzig), 1991 , vol. 333, # 6 p. 901 - 908

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Abstract

Abstract. Electrochemical reductions of 4-aryl-and 4, 5-diaryl-l, 2, 3-thiadiazols (1-5) in acetonitrile/0, l M tetraalkylammonium-supporting-electrolyte at Hg-cathodes in the presence of ethylchloroformiate (CAE) yield (E)-S-(2-aryl) ethenyl-and S-(1, 2-diaryl) ethenyl-O-ethyl- thiocarbonates (1 a-5 a). The S-carboxylation proceeds via preformation of cyclic- voltammetric-and'H-nmrprovable CAE-complexes, ring-opening and Nz-elimination in a ...