Natural Products Laboratory, Organic Chemistry Division‐I, Indian Institute of Chemical Technology, Hyderabad‐500 007, India
Abstract:
An environmentally friendly and highly efficient procedure for the preparation of 1,4‐dihydropyridines by the reaction between α,β‐unsaturated aldehydes, aromatic amines and β‐keto esters in the presence of silica supported perchloric acid is described.