Triethylamine → 4-[4-(2-Trifluoromethylbenzoyl)piperazin-1-yl]-benzonitrile

HRID 655605

Reaction equation

HRID 655605 reaction equation
Cl.[N:2]1([C:8]2[CH:15]=[CH:14][C:11]([C:12]#[N:13])=[CH:10][CH:9]=2)[CH2:7][CH2:6][NH:5][CH2:4][CH2:3]1.C(N(CC)CC)C.[F:23][C:24]([F:35])([F:34])[C:25]1[CH:33]=[CH:32][CH:31]=[CH:30][C:26]=1[C:27](Cl)=[O:28]>ClCCl.O>[F:23][C:24]([F:34])([F:35])[C:25]1[CH:33]=[CH:32][CH:31]=[CH:30][C:26]=1[C:27]([N:5]1[CH2:6][CH2:7][N:2]([C:8]2[CH:9]=[CH:10][C:11]([C:12]#[N:13])=[CH:14][CH:15]=2)[CH2:3][CH2:4]1)=[O:28]

Participants

6

Reactant 3

HCID 8471TriethylamineHCID 675612-(Trifluoromethyl)benzoyl chlorideHCID 27339944-(Piperazin-1-yl)benzonitrile hydrochloride

Product 1

HCID 114942194-[4-(2-Trifluoromethylbenzoyl)piperazin-1-yl]-benzonitrileYield 91%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6344DichloromethaneSolvent

Procedure

To a mixture of 4-piperazin-1-ylbenzonitrile hydrochloride (0.200 g, 0.890 mmol) in dichloromethane (15 mL) and triethylamine (0.452 g, 4.47 mmol) was added 2-trifluoromethylbenzoyl chloride (0.186 g, 0.890 mmol) at 0° C. The reaction mixture was warmed up to ambient temperature and stirred for 6 hours, then diluted with water, and extracted with dichloromethane. The organic phase was separated, washed with diluted HCl solution, sodium bicarbonate solution, brine, then dried over anhydrous MgSO4 and concentrated. The residue was purified by column chromatography and crystallization from n-hexane and the title compound was obtained as a white solid in 91% yield (0.294 g). 1H NMR (300 MHz, CDCl3) δ 7.72 (d, J=8.9 Hz, 1H), 7.54 (m, 4H), 7.36 (m, 1H), 6.84 (d, J=9.6 Hz, 2H), 3.94 (m, 2H), 3.33 (m, 6H). 13C NMR (75 MHz, CDCl3) δ 167.5, 153.0, 134.3, 133.6, 132.4, 129.5, 127.6, 127.2, 125.4, 121.8, 119.7, 114.9, 101.5, 47.3, 46.4, 41.2. MS (ES+) m/z 360.1 (M+1).

Workup

  1. extractionextracted with dichloromethane
  2. customThe organic phase was separated
  3. washwashed with diluted HCl solution, sodium bicarbonate solution, brine
  4. dry with materialdried over anhydrous MgSO4
  5. concentrationconcentrated
  6. customThe residue was purified by column chromatography and crystallization from n-hexane

Sources & evidence

ORD record
ord-b3070ebdfa9b41318fd3de4cbb17fe6f
Source dataset
uspto-grants-2011_12
Patent number
US08071603B2

Linked notes

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