CINDECA   05422
CENTRO DE INVESTIGACION Y DESARROLLO EN CIENCIAS APLICADAS "DR. JORGE J. RONCO"
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Circonia Sulfatada como un eficaz catalizador para la Síntesis de 1H-3,4-Dihidro-2,3-Benzotiazinas 2,2-Dióxido Y 1,2,3,4-Tetrahidro-3,2-Benzotiazepinas 3,3-Dióxido
Autor/es:
LEANDRO SAMSIABARRENA; L.J.MENDEZ; A.S.CÁNEPA; C.E.QUINCOCES; M.G.GONZÁLEZ; R.D.BRAVO
Lugar:
Benalmadena- Málaga- España
Reunión:
Simposio; XXI SICAT; 2008
Institución organizadora:
FISOCAT
Resumen:
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mso-level-number-position:left; margin-left:1.5pc; text-indent:-1.5pc; mso-ansi-font-size:12.0pt; font-family:"Times New Roman"; mso-ansi-font-weight:normal; mso-ansi-font-style:normal;} @list l14 {mso-list-id:2056198078; mso-list-type:hybrid; mso-list-template-ids:-313098298 -745489364 67698711 67698705 67698703 67698711 67698705 67698703 67698711 67698705;} @list l14:level1 {mso-level-tab-stop:1.5pc; mso-level-number-position:left; margin-left:1.5pc; text-indent:-1.5pc;} @list l15 {mso-list-id:2080472788; mso-list-type:hybrid; mso-list-template-ids:1254799206 1237988452 67698711 67698705 67698703 67698711 67698705 67698703 67698711 67698705;} @list l15:level1 {mso-level-text:"%1\)"; mso-level-tab-stop:1.5pc; mso-level-number-position:left; margin-left:1.5pc; text-indent:-1.5pc;} ol {margin-bottom:0pc;} ul {margin-bottom:0pc;} --> La eficiencia de la circonia sulfatada empleada como catalizador en la síntesis de benzotiazinas y benzotiazepinas en fase líquida es comparada con otros catalizadores ácidos homo y heterogéneos. La reacción se llevó a cabo en un sistema batch a reflujo a temperaturas entre 35 y 115 oC. La SO4=/ZrO2 presentó buenos rendimientos para la muestra previamente calcinada a 500 oC y posibilidades de regeneración de la actividad catalítica mediante un simple tratamiento del material usado en reacción. Durante la etapa de calcinación el catalizador fue analizado por Difracción de Rayos X, Adsorción de N2 y espectroscopía Raman.  El estudio de estos compuestos orgánicos tiene una potencial aplicación farmacológica.   Palabras clave: 2,3-benzotiazinas, 3,2-benzotiazepinas, sulfonilamidometilación intramolecular, circonia sulfatada, catálisis ácida.
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