Km. Al-zaydi et al., Studies with functionally substituted heteroaromatics: a new routes for synthesis of pyridazino[2,3-a] quinazoline and pyridazino-6-imine derivatives, J CHEM R-S, (4), 2000, pp. 154-155
Enaminones couple with diazotized anthranilic acid derivatives yielding 2-a
rylhydra-zonopropanals that condensed with active methylenes yielding conde
nsed pyridazines.