Water → 5-Ethoxy-3-(1-phenyl-1H-pyrazol-5-yl)-1-[3-(trifluoromethyl)phenyl]pyridazin-4(1H)-one

HRID 1624760Notes

Reaction equation

HRID 1624760 reaction equation
[OH:1][C:2]1[C:3](=[O:29])[C:4]([C:18]2[N:22]([C:23]3[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=3)[N:21]=[CH:20][CH:19]=2)=[N:5][N:6]([C:8]2[CH:13]=[CH:12][CH:11]=[C:10]([C:14]([F:17])([F:16])[F:15])[CH:9]=2)[CH:7]=1.I[CH2:31][CH3:32].C([O-])([O-])=O.[K+].[K+].O>CN(C=O)C>[CH2:31]([O:1][C:2]1[C:3](=[O:29])[C:4]([C:18]2[N:22]([C:23]3[CH:24]=[CH:25][CH:26]=[CH:27][CH:28]=3)[N:21]=[CH:20][CH:19]=2)=[N:5][N:6]([C:8]2[CH:13]=[CH:12][CH:11]=[C:10]([C:14]([F:16])([F:15])[F:17])[CH:9]=2)[CH:7]=1)[CH3:32]

Participants

6

Reactant 4

HCID 962WaterHCID 6340IodoethaneHCID 11430Potassium CarbonateHCID 594362225-Hydroxy-3-(1-phenyl-1H-pyrazol-5-yl)-1-[3-(trifluoromethyl)phenyl]pyridazin-4(1H)-one

Product 1

HCID 594362565-Ethoxy-3-(1-phenyl-1H-pyrazol-5-yl)-1-[3-(trifluoromethyl)phenyl]pyridazin-4(1H)-oneYield 88.3%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

A suspension of 5-hydroxy-3-(1-phenyl-1H-pyrazol-5-yl)-1-[3-(trifluoromethyl)phenyl]pyridazin-4(1H)-one (100 mg, 0.25 mmol), iodoethane (0.040 mL, 0.50 mmol), and K2CO3 (104 mg, 0.75 mmol) in DMF (1 mL) was stirred for 24 h at room temperature. The reaction mixture was poured into water and extracted with AcOEt. The extract was washed with brine, dried over MgSO4, and concentrated under reduced pressure. The residue was purified by basic silica gel column chromatography eluting with hexane/AcOEt (1/1) to give the title compound (94.1 mg, 88% yield) as an off-white

Workup

  1. extractionextracted with AcOEt
  2. washThe extract was washed with brine
  3. dry with materialdried over MgSO4
  4. concentrationconcentrated under reduced pressure
  5. customThe residue was purified by basic silica gel column chromatography
  6. washeluting with hexane/AcOEt (1/1)

Sources & evidence

ORD record
ord-bd6c0f3e6e2a4e7099eaeb9c8eb8baab
Source dataset
uspto-grants-2014_07
Patent number
US08778944B2

Reaction notes

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