Synthesis of 6-halogenated 4H-1,4-benzothiazines |
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| Authors: | R R Gupta Rakesh Kumar R K Gautam |
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| Institution: | Department of Chemistry, University of Rajasthan, Jaipur-302004, India |
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| Abstract: | The synthesis of 6-halogenated 4H-1,4-benzothiazines is reported by the condensation and oxidative cyclization of 4-substituted 2-aminobenzenethiols (I, R = Cl, Br) with β-diketones in presence of DMSO. The ir, nmr and mass spectral studies are included. 4-Substituted 2-aminobenzenethiols were also prepared by an improved and direct method. |
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