MnO2/Bentonite: A New Reactive for the Oxidation of Hantzsch'S Dihydropyridines Using Microwave Irradiation, in the Absence of Solvent (I)

Abstract
The oxidation of several 4-aryl-1,4-dihydrophyridines with MnO2 on Mexican Bentonite, without solvents, using as energy source a microwave over is described.