1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → 5-Methyl-1-phenyl-1H-pyrazole-4-carboxylic acid {2-oxo-2-[4-(2-trifluoromethyl-benzoyl)-piperazin-1-yl]-ethyl}-amide

HRID 1177917Notes

Reaction equation

HRID 1177917 reaction equation
CCN(C(C)C)C(C)C.Cl.[NH2:11][CH2:12][C:13]([N:15]1[CH2:20][CH2:19][N:18]([C:21](=[O:32])[C:22]2[CH:27]=[CH:26][CH:25]=[CH:24][C:23]=2[C:28]([F:31])([F:30])[F:29])[CH2:17][CH2:16]1)=[O:14].C1C=CC2N(O)N=NC=2C=1.CCN=C=NCCCN(C)C.[CH3:54][C:55]1[N:59]([C:60]2[CH:65]=[CH:64][CH:63]=[CH:62][CH:61]=2)[N:58]=[CH:57][C:56]=1[C:66](O)=[O:67]>CN(C=O)C.O>[O:14]=[C:13]([N:15]1[CH2:16][CH2:17][N:18]([C:21](=[O:32])[C:22]2[CH:27]=[CH:26][CH:25]=[CH:24][C:23]=2[C:28]([F:31])([F:29])[F:30])[CH2:19][CH2:20]1)[CH2:12][NH:11][C:66]([C:56]1[CH:57]=[N:58][N:59]([C:60]2[CH:65]=[CH:64][CH:63]=[CH:62][CH:61]=2)[C:55]=1[CH3:54])=[O:67]

Participants

8

Reactant 5

HCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 757711-HydroxybenzotriazoleHCID 81531DiisopropylethylamineHCID 1452215-Methyl-1-phenylpyrazole-4-carboxylic acidHCID 669531782-Amino-1-[4-(2-trifluoromethyl-benzoyl)-piperazin-1-yl]-ethanone hydrochloride

Product 1

HCID 251665015-Methyl-1-phenyl-1H-pyrazole-4-carboxylic acid {2-oxo-2-[4-(2-trifluoromethyl-benzoyl)-piperazin-1-yl]-ethyl}-amideYield 11.74%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

DIPEA (189 mg, 0.256 mL, 1.48 mmol) was added to a stirred solution of 2-amino-1-[4-(2-trifluoromethyl-benzoyl)-piperazin-1-yl]-ethanone hydrochloride salt (prepared by the method described above) (208 mg, 0.59 mmol) in DMF (2 mL). HOBT (80 mg, 0.59 mmol) and EDCI (114 mg, 0.59 mmol) were then added at room temperature. After 2 minutes, 5-Methyl-1-phenyl-1H-pyrazole-4-carboxylic acid (100 mg, 0.49 mmol) was added and the resulting mixture was stirred at room temperature for 4 hrs. Cold water was then added and the product was extracted with EtOAc and the organic layer was washed with brine. The organic phase was dried over Na2SO4 and concentrated under reduced pressure to afford 29 mg (11.74% yield) 5-Methyl-1-phenyl-1H-pyrazole-4-carboxylic acid {2-oxo-2-[4-(2-trifluoromethyl-benzoyl)-piperazin-1-yl]-ethyl}-amide. LCMS Purity: 94.32%. 1H NMR (DMSO-d6): δ 8.24 (bs, 1H), 8.14 (s, 1H), 7.88-7.74 (m, 2H), 7.7-7.6 (m, 1H), 7.6-7.4 (m, 6H), 4.2-4.4 (d, 2H), 3.9-3.6 (m, 4H), 3.5-3.4 (m, 2H), 3.2-3.0 (m, 2H).

Workup

  1. customprepared by the method
  2. extractionthe product was extracted with EtOAc
  3. washthe organic layer was washed with brine
  4. dry with materialThe organic phase was dried over Na2SO4
  5. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-60da7f74c019458ab7b4b6233c7cc6dd
Source dataset
uspto-grants-2010_11
Patent number
US07842696B2

Reaction notes

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