Sodium sulfide promoted synthesis of highly substituted pyridines

Abstract

This study presents a straightforward and effective method for the synthesis of 2-amino-6-alkoxy-4-arylpyridine-3,5-dicarbonitrile derivatives. These multi-substituted pyridine compounds are prepared through a convenient pseudo three-component reaction involving arylaldehydes malononitrile, alcohols, and sodium sulfide in an aqueous medium. Key benefits of this approach include its environmentally friendly nature, high product yields, rapid reaction times, cost-effectiveness, and easy accessibility of starting materials, mild reaction conditions, and a simple purification process.