Tetrahedron

The reaction of 4, 5-dichloro-1, 2, 3-dithiazolium chloride with dimethylsulfonium dicyanomethylide: an improved synthesis of (4-chloro-1, 2, 3-dithiazolylidene) …

AS Kalogirou, PA Koutentis

Index: Kalogirou, Andreas S.; Koutentis, Panayiotis A. Tetrahedron, 2009 , vol. 65, # 34 p. 6850 - 6854

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Citation Number: 8

Abstract

4, 5-Dichloro-1, 2, 3-dithiazolium chloride 6 (Appel salt) reacts with dimethylsulfonium dicyanomethylide 11 to give 5-(4-chloro-1, 2, 3-dithiazolylidene) malononitrile 1 and a mixture of E/Z isomers of 3-(4-chloro-5H-1, 2, 3-dithiazol-5-ylideneamino)-3-chloro-2- (methylthio) acrylonitrile 13. The reaction of 4-chloro-5H-1, 2, 3-dithiazole-5-thione 10 with dimethylsulfonium dicyanomethylide 11 gives (dithiazolylidene) malononitrile 1 in 92% ...