A Mild and Efficient Method to Functionalize Azines (Quinoline,Isoquinoline, and Phenanthridine) Using Acetylenic Esters and Heterocyclic NH or 1,3‐Dicarbonyl Compounds

One‐pot reactions involving azines (quinoline, isoquinoline, and phenanthridine), with acetylenic esters in the presence of heterocyclic NH compounds (benzotriazole, 2‐methylbenzimidazole, 2‐benzoxazolinone, 6‐chlorobenzoxazolinone, maleimide, indole, and 2‐methylindole) or 1,3‐dicarbonyl compound such as 5,5‐dimethyl‐1,3‐cyclohexadione, are described. The reactions proceeded smoothly at RT, and with excellent yields. The structures of the synthesized compounds have been characterized by the elemental analyses and spectral studies.