Triethylamine → (S)-3-cyclohexyl-N-(1-methyl-1H-pyrazol-3-yl)-2-[2-oxo-4-(2-trifluoromethyl-phenoxy)-2,5-dihydro-pyrrol-1-yl]-propionamide

HRID 19024Notes

Reaction equation

HRID 19024 reaction equation
[CH:1]1([CH2:7][C@H:8]([N:12]2[CH2:16][C:15]([O:17][C:18]3[CH:23]=[CH:22][CH:21]=[CH:20][C:19]=3[C:24]([F:27])([F:26])[F:25])=[CH:14][C:13]2=[O:28])[C:9]([OH:11])=O)[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1.C(Cl)(=O)C(Cl)=O.[CH3:35][N:36]1[CH:40]=[CH:39][C:38]([NH2:41])=[N:37]1.C(N(CC)CC)C>ClCCl.CN(C)C=O.C(OCC)(=O)C>[CH:1]1([CH2:7][C@H:8]([N:12]2[CH2:16][C:15]([O:17][C:18]3[CH:23]=[CH:22][CH:21]=[CH:20][C:19]=3[C:24]([F:27])([F:25])[F:26])=[CH:14][C:13]2=[O:28])[C:9]([NH:41][C:38]2[CH:39]=[CH:40][N:36]([CH3:35])[N:37]=2)=[O:11])[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1

Participants

8

Reactant 4

HCID 8471TriethylamineHCID 65578Oxalyl chlorideHCID 1372541-Methyl-3-aminopyrazoleHCID 66893512(S)-3-cyclohexyl-2-[2-oxo-4-(2-trifluoromethyl-phenoxy)-2,5-dihydro-pyrrol-1-yl]-propionic acid

Product 1

HCID 57920072(S)-3-cyclohexyl-N-(1-methyl-1H-pyrazol-3-yl)-2-[2-oxo-4-(2-trifluoromethyl-phenoxy)-2,5-dihydro-pyrrol-1-yl]-propionamide

Reagents, catalysts & solvents 3

HCID 6228DimethylformamideCatalystHCID 6344DichloromethaneSolvent2×HCID 8857Ethyl AcetateSolvent

Procedure

A solution of (S)-3-cyclohexyl-2-[2-oxo-4-(2-trifluoromethyl-phenoxy)-2,5-dihydro-pyrrol-1-yl]-propionic acid (prepared as in Example 32, 100 mg, 0.25 mmol) in dichloromethane (4 mL) was treated with a dichloromethane solution of oxalyl chloride (2 M, 0.25 mL) and one drop of N,N-dimethylformamide. The mixture was stirred for 45 min and solvents were evaporated. The residue was dissolved in dichloromethane (4 mL) and treated with 1-methyl-1H-pyrazol-3-ylamine (30 mg, 0.30 mmol), and triethylamine (50 mg, 0.5 mmol). The reaction mixture was stirred for 4 h at 25° C., under nitrogen. The reaction mixture was diluted with ethyl acetate, washed with saturated ammonium chloride solution, water, saturated sodium chloride solution and dried over sodium sulfate. The organic layer was concentrated, and the crude product was purified by ISCO flash chromatography (Teledyne Isco RediSep Flash Column 12 g, 30% to 100% ethyl acetate/hexanes) to afford (S)-3-cyclohexyl-N-(1-methyl-1H-pyrazol-3-yl)-2-[2-oxo-4-(2-trifluoromethyl-phenoxy)-2,5-dihydro-pyrrol-1-yl]-propionamide. This material was dissolved in dichloromethane (4 mL) and treated with 1M hydrogen chloride in diethyl ether (2 mL). Solvents were evaporated and the residue was triturated with diethyl ether and filtered to give (S)-3-cyclohexyl-N-(1-methyl-1H-pyrazol-3-yl)-2-[2-oxo-4-(2-trifluoromethyl-phenoxy)-2,5-dihydro-pyrrol-1-yl]-propionamide hydrochloride (20 mg, 16%) as a tan solid: LR-ES-MS m/z calculated for C24H27F3N4O3 [M]+ 476, observed [M+H]+ 477; 1H NMR (300 MHz, DMSO-d6) δ ppm 0.78-1.32 (m, 6H) 1.51-1.87 (m, 7H) 3.73 (s, 3H) 4.19 (d, J=18.7 Hz, 1H) 4.58 (d, J=18.7 Hz, 1H) 4.86-4.94 (m, 1H) 4.96 (s, 1H) 6.40 (d, J=2.1 Hz, 1H) 7.47-7.58 (m, 2H) 7.65 (d, J=7.8 Hz, 1H) 7.74-7.90 (m, 2H) 10.72 (s, 1H).

Workup

  1. customsolvents were evaporated
  2. dissolutionThe residue was dissolved in dichloromethane (4 mL)
  3. stirringThe reaction mixture was stirred for 4 h at 25° C., under nitrogen
  4. washwashed with saturated ammonium chloride solution, water, saturated sodium chloride solution
  5. dry with materialdried over sodium sulfate
  6. concentrationThe organic layer was concentrated
  7. customthe crude product was purified by ISCO flash chromatography (Teledyne Isco RediSep Flash Column 12 g, 30% to 100% ethyl acetate/hexanes)

Sources & evidence

ORD record
ord-aed2909ecc644ab59375450e02bd0f3c
Source dataset
uspto-grants-2010_06
Patent number
US07741327B2

Reaction notes

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