Reaction between 2, 2′??dithiodianiline and acetylenic ketones or esters. A new synthesis of 4H??1, 4??benzothiazines

…, G Trapani, V Berardi, P Marchini

Index: Liso; Trapani; Berardi; Marchini Journal of Heterocyclic Chemistry, 1980 , vol. 17, # 2 p. 377 - 379

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Citation Number: 11

Abstract

Abstract The title compounds (3a-c) together with the benzothiazolines (4b-c) were obtained by reaction between 2, 2′-dithiodianiline (1) and acetylenic ketone (2a) or esters (2b-c). A possible pathway involving the formation and subsequent cyclization to 3 of enamine intermediates A and/or B, is suggested.