The CC coupling of (3aR,4S,7R,7aS)-rel-2-[(3-chloro-4-fluorophenyl)amino]-3a,4,7,7a-tetrahydro-4,7-methano-1H-isoindole-1,3(2H)-dione (3) which was prepared as a new starting material and (3aR,4S,7R,7aS)-rel-2-[(2,4-dinitrophenyl)amino]-3a,4,7,7a-tetrahydro-4,7-methano-1H-isoindole-1,3-(2H)-dione (6) with aryl-and heteroaryl iodides gave the aryl(hetaryl), N-arylamino tricyclic imides 4a-d and 7a-d under reductive Heck conditions.
Imidazolium-based ionic liquids, 1,3-dibenzylimidazolium trifluoroacetate, 1-benzyl-3-ethylimidazolium trifluoroacetate and 1-benzyl-3-propylimidazolium trifluoroacetate were prepared by simple methods, when compared with those in literature sources, and characterized by IR, NMR and GC-MS and LC-MS. These ILs (Ionic Liquids) were employed as leaching agents in the treatment of industrial copper and zinc bearing slag for the recovery of metals. Results showed that synthesized all novel ionic liquids meet the standard specifications of an ionic liquid. Metal recovery rates decrease with time except for zinc dissolution in 1,3-dibenzylimidazolium trifluoroacetate. 1,3-dibenzylimidazolium trifluoroacetate, when compared with others, is a more effective leaching agent for the treatment of copper and zinc bearing brass slag. Metal recovery rates achieved with this IL are 62.58% for zinc and 24.95% for copper. RESUMEN: Síntesis de nuevos líquidos iónicos y evaluación de su rendimiento de lixiviación en la recuperación de cobre y zinc de escorias industriales de latón.Los líquidos iónicos a base de imidazolio, trifluoroacetato de 1,3-dibencilimidazolio, trifluoroacetato de 1-bencil-3-etilimidazolio y trifluoroacetato de 1-bencil-3-propilimidazolio se prepararon mediante métodos sencillos, comparados con los de fuentes bibliográficas. Se caracterizaron mediante IR, NMR, GC-MS y LC-MS. Los líquidos iónicos se emplearon como agentes de lixiviación en el tratamiento de una escoria industrial de cobre y cinc para la recuperación de dichos metales. Los resultados mostraron que todos los nuevos líquidos iónicos sintetizados cumplen con las especificaciones estándar de un líquido iónico. Las tasas de recuperación de metales disminuyen con el tiempo, excepto para la disolución de zinc en trifluoroacetato de 1,3-dibencilimidazolio. El trifluoroacetato de 1,3-dibencilimidazolio, cuando se compara con otros, es un agente de lixiviación más eficaz para el tratamiento de escorias de latón. Las tasas de recuperación de metales logradas con este líquido iónico son 62,58% para el zinc y 24,95% para el cobre.
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