Synthesis and biological activity of substituted 4H-1,4-benzothiazines, their sulfones, and ribofuranosides.


The present article describes the synthesis of new 4H-1,4-benzothiazines via condensation and oxidative cyclization of substituted 2-aminobenzenethiols with β-diketones/β-ketoesters in dimethyl sulfoxide. The oxidation of these synthesized 4H-1,4-benzothiazines with 30% hydrogen peroxide in glacial acetic acid yielded 4H-1,4-benzothiazine sulfones and the… (More)
DOI: 10.1080/15257770.2013.765012


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