Abstract In order to confirm the regiochemistry for the functionalization of 1-(1, 1-dibromo-2- oxopropyl)-4, 5-dihalopyridazin-6-ones, the dehalogenation of 1-methyl-5-halo-4-substituted- pyridazin-6-ones using Pd/C and hydrogen was carried out. The results of the title reaction are reported.
