Microwave-assisted regioselective one-pot synthesis of trisubstituted pyridine scaffolds using K5CoW12O40•3H2O under solvent free conditions

A highly efficient, microwave-assisted, regioselective synthesis of 2,3-disubstituted-6-arylpyridines and new series of 7,7-dimethyl-2-aryl-5,6,7,8-tetrahydroquinoline-5-ones from enaminones in the presence of K(5)CoW(12)O(40)center dot 3H(2)O (1.0 mol %) as heterogeneous catalyst under solvent free conditions is reported.