A rapid and direct access to N-aryl substituted fused triazinone derivatives has been accomplished via N-arylation of 1, 2, 3-triazin-4-one ring involving a Cu-mediated coupling between triazinone derivatives and aryl boronic acids. A combination of Cu (OAc) 2–Et3N in 1, 2-dichloroethane was found to be effective and various fused triazinone derivatives have been prepared by using this methodology. Molecular structure of a representative ...