Heteropolyacid as an Efficient Catalyst for Synthesis of 3,4-Dihydro-1H-2,3-benzothiazine-2,2-dioxides |
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| Authors: | Alicia S Cánepa Leandro D Sasiambarrena |
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| Institution: | Laboratorio de Estudio de Compuestos Orgánicos, Departamento de Química , Facultad de Ciencias Exactas, Universidad Nacional de La Plata , La Plata, Argentina |
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| Abstract: | A facile and efficient method for the formation of 3,4-dihydro-1H-2,3-benzothiazine 2,2-dioxides 2, compounds from benzylsulfonamides and formaldehyde is described using heteropolyacids H3PW12O40 and H3PMo12O40 supported on silica as catalysts. |
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| Keywords: | Benzothiazines catalyst intramolecular cyclization keggin heteropolyacid sulfonylamidomethylation |
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