Novel Pyridine-Formation Reactions of 2-(Phosphoranylideneamino)-acrylaldehydes with Acetylenic Esters. Synthesis of 2-Mono- and 2,5-Disubstituted Nicotinates
摘要:
Preparation of 2-(phosphoranylideneamino)acrylaldehydes, novel formyl-substituted (vinylimino)phosphoranes, was accomplished by the reaction of formyl-2H-azirines with triphenylphosphine. Their novel pyridine-formation reactions with acetylenic esters achieved the preferential formation of 2-mono- and 2,5-disubstituted nicotinate derivatives.
Novel Pyridine-Formation Reactions of 2-(Phosphoranylideneamino)-acrylaldehydes with Acetylenic Esters. Synthesis of 2-Mono- and 2,5-Disubstituted Nicotinates
摘要:
Preparation of 2-(phosphoranylideneamino)acrylaldehydes, novel formyl-substituted (vinylimino)phosphoranes, was accomplished by the reaction of formyl-2H-azirines with triphenylphosphine. Their novel pyridine-formation reactions with acetylenic esters achieved the preferential formation of 2-mono- and 2,5-disubstituted nicotinate derivatives.