N‐alkylation of 1, 4‐dihydropyridine derivatives

Abstract
A series of 1‐alkyl‐2, 6‐dimethyl‐3, 5‐diethoxycarbonyl‐4‐aryl‐1, 4‐dihydropyridines have been synthesised by the reaction of the corresponding 1, 4‐dihydro‐pyridines with consecutively sodium hydride and alkyl halides.