Synthesis of hantzsch 1,4‐dihydropyridines under solvent‐free condition using zn[(L)proline]2 as lewis acid catalyst

Abstract The present short communication describes a Lewis acid (Zn[(L)proline] 2 ) catalysed one pot synthesis of Hantzsch 1,4‐dihydropyridine (DHP) derivatives under solvent‐free condition by conventional heating and microwave irradiation. The Lewis acid catalyst Zn[(L)proline] 2 used in this reaction afford moderate to good yield. The catalyst is reusable upto five cycles without appreciable loss of its catalytic activity.