The synthesis of some dialkyl 4-(3-substituted amino)phenyl-1,4-dihydro-2,6-dimethylpyridine-3,5-dicarboxylates

Dialkyl 4‐(3‐aminophenyl)‐1,4‐dihydro‐2,6‐dimethylpyridine‐3,5‐dicarboxylates 1 were transformed into alkyl 4‐(3‐(((2‐benzoylamino‐2‐methoxycarbonyl)ethenyl)amino)phenyl)‐1,4‐dihydro‐2,6‐dimethyl‐pyridine‐3,5‐dicarboxylates 4 and with 2,2‐disubstituted‐1‐dimethylaminoethenes 7 into dimethyl 4‐(3‐(((2,2‐diacyl‐ or 2‐acyl‐2‐alkoxycarbonyl)ethenyl)amino)phenyl)‐1,4‐dihydro‐2,6‐dimethylpyridine‐3,5‐dicarboxylates 8 and their ethyl methyl analogues 9.