Trifluoroacetic acid → 1-[2-fluoro-4-(1H-pyrazol-1-yl)phenyl]-5-methoxy-3-{1-[3-(trifluoromethoxy)phenyl]-1H-pyrazol-5-yl}pyridazin-4(1H)-one

HRID 1528049Notes

Reaction equation

HRID 1528049 reaction equation
CN(C)[CH:3]=[CH:4][C:5]([C:7]1[C:12](=[O:13])[C:11]([O:14][CH3:15])=[CH:10][N:9]([C:16]2[CH:21]=[CH:20][C:19]([N:22]3[CH:26]=[CH:25][CH:24]=[N:23]3)=[CH:18][C:17]=2[F:27])[N:8]=1)=O.Cl.[F:30][C:31]([F:42])([F:41])[O:32][C:33]1[CH:34]=[C:35]([NH:39][NH2:40])[CH:36]=[CH:37][CH:38]=1.C(O)(C(F)(F)F)=O>C(O)C>[F:27][C:17]1[CH:18]=[C:19]([N:22]2[CH:26]=[CH:25][CH:24]=[N:23]2)[CH:20]=[CH:21][C:16]=1[N:9]1[CH:10]=[C:11]([O:14][CH3:15])[C:12](=[O:13])[C:7]([C:5]2[N:39]([C:35]3[CH:36]=[CH:37][CH:38]=[C:33]([O:32][C:31]([F:41])([F:42])[F:30])[CH:34]=3)[N:40]=[CH:3][CH:4]=2)=[N:8]1

Participants

5

Reactant 3

HCID 6422Trifluoroacetic acidHCID 45046393(3-(Trifluoromethoxy)phenyl)hydrazine hydrochloride2×HCID 712721203-[3-(dimethylamino)prop-2-enoyl]-1-[2-fluoro-4-(1H-pyrazol-1-yl)phenyl]-5-methoxypyridazin-4(1H)-one

Product 1

HCID 712721841-[2-fluoro-4-(1H-pyrazol-1-yl)phenyl]-5-methoxy-3-{1-[3-(trifluoromethoxy)phenyl]-1H-pyrazol-5-yl}pyridazin-4(1H)-oneYield 35.9%

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent3×

Procedure

To a suspension of 3-[3-(dimethylamino)prop-2-enoyl]-5-methoxy-1-[2-fluoro-4-(1H-pyrazol-1-yl)phenyl]pyridazin-4(1H)-one (200 mg) in ethanol (2.0 mL) was added dropwise a solution of [3-(trifluoromethoxy)phenyl]hydrazine hydrochloride (139 mg) and TFA (0.2 mL) in ethanol (2.0 mL), and the mixture was so stirred at room temperature for 24 hr. To the reaction mixture was added an ethanol solution (0.3 ml) of [3-(trifluoromethoxy)phenyl]hydrazine hydrochloride (16.7 mg), and the mixture was stirred at room temperature for 24 hr. The precipitated solid was collected by filtration. The mother liquor was concentrated, and the precipitated solid was collected by filtration. The solid was combined with the previously obtained solid, and recrystallized from acetone/water to give the title compound (96.1 mg).

Workup

  1. stirringthe mixture was stirred at room temperature for 24 hr
  2. filtrationThe precipitated solid was collected by filtration
  3. concentrationThe mother liquor was concentrated
  4. filtrationthe precipitated solid was collected by filtration
  5. customrecrystallized from acetone/water

Sources & evidence

ORD record
ord-28b8fb41968f43f49bf4f2da66588fa5
Source dataset
uspto-grants-2015_07
Patent number
US09090586B2

Reaction notes

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