Chemistry of thienopyridines. XII. Selective formation of N??oxides, sulfoxides, and sulfones in some tricyclic systems

LH Klemm, SB Mathur, R Zell…

Index: Klemm,L.H. et al. Journal of Heterocyclic Chemistry, 1971 , vol. 8, p. 931 - 935

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Citation Number: 16

Abstract

Abstract Direct conversion of [1] benzothieno [3, 2-b] pyridine (IVa), thieno [3, 2-b: 4, 5-b'] dipyridine (Va), and thieno [2, 3-b: 4, 5-b'] dipyridine (VIa) into their sulfoxides was effected by means of an equimolar quantity of iodobenzene dichloride in aqueous acetonitrile. Treatment of IVa-VIa with excess chlorine gas in carbon tetrachloride and then with water gave the corresponding sulfones, IVc-VIc. Hydrogen peroxide in glacial acetic acid ...