Arcillas naturales modificadas con ácidos y superácidos como catalizadores en la síntesis del derivado 1-bencil-2- fenil-1h-bencimidazol promovido por microondas

Abstract

In this thesis was evaluated the synthesis of the derivate 1-benzyl-2-phenyl-1Hbenzimidazole, by the reaction between o-phenylenediamine and benzaldehyde in presence of natural clays modified with different acids and superacids like catalyst. The reaction was promoted by heating under microwave radiation and studying by different conditions of time reaction, temperature and load of the catalyst using water and ethanol as solvents. The best catalyst results for the obtaining of 1- benzyl-2-phenyl-1H-benzimidazole was in a temperature of 100 °C, when the clay prepurified and modified with the perchloric acid was employed at 1 % (w/w) on water ( 52% of yield); modified with the chlorosulfonic acid at 5 % (w/w) on ethanol (52% of yield); and the modified with trifluoromethanesulfonic acid at 10 % (w/w) on ethanol (55% of yield)