Synthesis and Reactivity of 1-Alkyl-4-carbamoyl Dihydropyridines

Abstract

The synthesis and the reactivity of dihydropyridine systems have long been investigated by our group. In particular, the preparation of dihydropyridines by borohydride reduction of 2-, 3-, 4-cyano- and 3-me- thylpyridinium salts² and by electrochemical reduction of 3-acetyl- and 3-carbamoylpyridinium salts were studied. We wish now to report the results of the reduction of 1-alkyl-4-carbamoylpyridinium salts.