
Synthesis and properties of new heterocyclic betaines: 4-Aryl-5-(methoxycarbonyl)-2-oxo-3-(pyridin-1-ium-1-yl)-2,3-dihydro-1H-pyrrol-3-ides
Keywords: Heterocyclic betaines; Azirines; Pyridinium ylides; Solvatochromism;