A Novel Synthesis of 2-Arylaminothiazolopyridazinones
The reaction of 5(4)-amino-4(5)-chloropyridazin-3(2H)-ones 1 (9) with methyl dithiocarbamates 2 gave 2-arylaminothiazolopyridazinones 3 (10).Treatment of 5(4)-alkylamino-4(5)-chloropyridazin-3(2H)-ones 5 (12) with 2 afforded the corresponding 2-aryliminothiazolopyridazinones 6 (13).Cyclization of 1a with phenylisothiocyanate produced 2-amino- and 2-iminothiazolopyridazinones 3a and 16.