Dienophilicity of imidazole in inverse electron demand Diels-Alder reactions; intramolecular reactions with 1,2,4-triazines

Article abstract of DOI:10.1016/S0040-4039(97)01800-5

Imidazole and 2-phenylimidazole undergo intramolecular cycloadditions with 1,2,4-triazines tethered between an imidazole nitrogen and the triazinyl C3 position with a trimethylene chain to produce tetrahydro-1,5-naphthyridines following loss of N₂