6-Chloro-3-(trifluoromethyl)-(1,2,4)triazolo(4,3-b)pyridazine → 6-[4-(2,4-Difluorophenyl)piperazin-1-yl]-3-(trifluoromethyl)-[1,2,4]triazolo[4,3-b]pyridazine
Reaction equation
[F:1][C:2]1[CH:7]=[C:6]([F:8])[CH:5]=[CH:4][C:3]=1[N:9]1[CH2:14][CH2:13][NH:12][CH2:11][CH2:10]1.Cl[C:16]1[CH:17]=[CH:18][C:19]2[N:20]([C:22]([C:25]([F:28])([F:27])[F:26])=[N:23][N:24]=2)[N:21]=1>>[F:1][C:2]1[CH:7]=[C:6]([F:8])[CH:5]=[CH:4][C:3]=1[N:9]1[CH2:10][CH2:11][N:12]([C:16]2[CH:17]=[CH:18][C:19]3[N:20]([C:22]([C:25]([F:26])([F:28])[F:27])=[N:23][N:24]=3)[N:21]=2)[CH2:13][CH2:14]1Participants
3
Procedure
A mixture of 1-(2,4-difluorophenyl)piperazine and 6-chloro-3-(trifluoromethyl)-[1,2,4]triazolo[4,3-b]pyridazine was allowed to react by General Synthetic Method 3. The crude product was purified by hplc using a Waters XTerra C18 column (5μ silica, 19 mm diameter, 100 mm length) eluted with decreasingly polar mixtures of water (containing 0.1% aqueous ammonia) and acetonitrile as eluents to give 6-[4-(2,4-difluorophenyl)piperazin-1-yl]-3-(trifluoromethyl)-[1,2,4]triazolo[4,3-b]pyridazine.