[4,4 '-Bipyridine]-1,1 vertical bar-diium tricyanomethanide as a nanostructured molten salt and its catalytic application in the synthesis of tetrahydrobenzo[b]pyrans, amido and aminoalkyl naphthol derivatives

摘要

An efficient process for the synthesis of tetrahydrobenzo[b]pyrans derivatives was attained via the reaction of dimedone, various aldehydes and malononnitrile using[4,4'-Bipyridine]-1,1'-diium tricyanomethanide {[4,4'-BPyH[C(CN)(3)](2)} as a green mild nano structure molten salt catalyst under solvent -free conditions at room temperature. To further investigation on catalytic properties of {[4,4'-BPyH][C(CN)(3)](2)}, it was used in the synthesis of amido and aminoalkyl naphthol derivatives under solvent -free conditions at 75 degrees C. {[4,4'-BPyH][C(CN)(3)](2)} has advantages such as cleaner reaction profile, benign characters, cost effectiveness, reusability of the catalysts and being in agreement with the green chemistry protocols. (C) 2016 Elsevier B.V. All rights reserved.