Potassium Carbonate → 1-(6-(4-(trifluoromethyl)-1H-pyrazol-1-yl)pyridin-3-yl)butan-1-one

HRID 1892718Notes

Reaction equation

HRID 1892718 reaction equation
[F:1][C:2]([F:9])([F:8])[C:3]1[CH:4]=[N:5][NH:6][CH:7]=1.Cl[C:11]1[N:16]=[CH:15][C:14]([C:17](=[O:21])[CH2:18][CH2:19][CH3:20])=[CH:13][CH:12]=1.C(=O)([O-])[O-].[K+].[K+]>>[F:1][C:2]([F:9])([F:8])[C:3]1[CH:4]=[N:5][N:6]([C:11]2[N:16]=[CH:15][C:14]([C:17](=[O:21])[CH2:18][CH2:19][CH3:20])=[CH:13][CH:12]=2)[CH:7]=1

Participants

4

Reactant 3

HCID 11430Potassium CarbonateHCID 127777954-(Trifluoromethyl)-1H-pyrazoleHCID 454801741-(6-Chloropyridin-3-yl)butan-1-one

Product 1

HCID 681567451-(6-(4-(trifluoromethyl)-1H-pyrazol-1-yl)pyridin-3-yl)butan-1-oneYield 99.4%

Conditions

Temperature
50 °C

Procedure

A mixture of 4-(trifluoromethyl)pyrazole (116 mg, 0.85 mmol), 1-(6-chloropyridin-3-yl)butan-1-one (130 mg, 0.71 mmol), and potassium carbonate (294 mg, 2.12 mmol) was stirred 4 h at 50° C. The mixture was cooled to room temperature and stirred overnight. The mixture was partitioned between ethyl acetate and water. The organic layer was dried over MgSO4 and concentrated under reduced pressure. The residue was purified by silica gel chromatography to give 1-(6-(4-(trifluoromethyl)-1H-pyrazol-1-yl)pyridin-3-yl)butan-1-one (200 mg) as a colorless solid. 1H NMR (400 MHz, CDCl3) δ 8.97-8.99 (m. 1H), 8.90-8.91 (m, 1H), 8.39 (dd, J=8.5, 2.4 Hz, 1H), 8.08 (dd, J=8.58, 0.78 Hz, 1H), 7.93 (s, 1H), 2.94 (t, J=7.4 Hz, 2H), 1.74-1.85 (m, 2H), 1.02 (t, J=7.4 Hz, 3H).

Workup

  1. temperatureThe mixture was cooled to room temperature
  2. stirringstirred overnight
  3. customThe mixture was partitioned between ethyl acetate and water
  4. dry with materialThe organic layer was dried over MgSO4
  5. concentrationconcentrated under reduced pressure
  6. customThe residue was purified by silica gel chromatography

Sources & evidence

ORD record
ord-22a3caceb1784e52ad8670cb3501c2b6
Source dataset
uspto-grants-2013_08
Patent number
US08507533B2

Reaction notes

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