Some novel 3-halo-6-(4-substituted-phenoxy)pyridazines and 3,6-di-(4-substi
tuted-phenoxy)pyridazines were synthesized from 3,6-dichloropyridazine or 3
,6-diiodopyridazine. 3,6-Diiodopyridazine was prepared from 3,6-dichloropyr
idazine using hydriodic acid/iodine monochloride.