F[C:2]1[N:3]=[N:4][C:5]([F:8])=[CH:6][CH:7]=1.[F:9][C:10]([F:24])([F:23])[C:11]1[CH:12]=[C:13]([N:17]2[CH2:22][CH2:21][NH:20][CH2:19][CH2:18]2)[CH:14]=[CH:15][CH:16]=1.C(=O)([O-])[O-].[Na+].[Na+].CN(C)C=O>O>[F:8][C:5]1[N:4]=[N:3][C:2]([N:20]2[CH2:19][CH2:18][N:17]([C:13]3[CH:14]=[CH:15][CH:16]=[C:11]([C:10]([F:23])([F:24])[F:9])[CH:12]=3)[CH2:22][CH2:21]2)=[CH:7][CH:6]=1A mixture of 2.7 parts of 3,6-difluoropyridazine, 4.6 parts of 1-[3-(trifluoromethyl)phenyl]piperazine, 3.2 parts of sodium carbonate and 90 parts of N,N-dimethylformamide was stirred overnight at 60° C. The reaction mixture was poured 1nto water. The product was filtered off, washed with water and crystallized from 2-propanol, yielding 3 parts (46%) of 3-fluoro-6-[4-[3-(trifluoromethyl)phenyl]-1-piperazinyl]pyridazine; mp. 131.5° C. (compound 24).
Wird geladen…