1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → 3-(5-amino-4-benzoyl-pyrazol-1-yl)-N-cyclopropyl-4-methylbenzamide

HRID 884770Notes

Reaction equation

HRID 884770 reaction equation
[NH2:1][C:2]1[N:6]([C:7]2[CH:8]=[C:9]([CH:13]=[CH:14][C:15]=2[CH3:16])[C:10](O)=[O:11])[N:5]=[CH:4][C:3]=1[C:17](=[O:24])[C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1.CCN=C=N[CH2:30][CH2:31][CH2:32][N:33](C)C.C1C=CC2N(O)N=NC=2C=1.C(N(C(C)C)CC)(C)C.C1(N)CC1>CN(C=O)C.CCOC(C)=O>[NH2:1][C:2]1[N:6]([C:7]2[CH:8]=[C:9]([CH:13]=[CH:14][C:15]=2[CH3:16])[C:10]([NH:33][CH:32]2[CH2:30][CH2:31]2)=[O:11])[N:5]=[CH:4][C:3]=1[C:17](=[O:24])[C:18]1[CH:19]=[CH:20][CH:21]=[CH:22][CH:23]=1

Participants

8

Reactant 5

HCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 69828CyclopropylamineHCID 757711-HydroxybenzotriazoleHCID 81531DiisopropylethylamineHCID 112094383-(5-amino-4-benzoyl-1H-pyrazol-1-yl)-4-methylbenzoic acid

Product 1

HCID 114852003-(5-amino-4-benzoyl-pyrazol-1-yl)-N-cyclopropyl-4-methylbenzamide

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a stirred solution of 3-(5-amino-4-benzoyl-pyrazol-1-yl)-4-methyl-benzoic acid 5 (Example 3, 700 mg, 2.18 mmol, 1.0 eq) in 30 mL of DMF was added EDCI (855 mg 4.35 mmol, 2.0 eq), HOBt (589 mg, 4.35 mmol, 2.0 eq), and diisopropylethylamine (1.59 mL, 8.71 mmol, 4.0 eq) and the solution was stirred for 15 minutes at room temperature when cyclopropylamine (302 μL, 4.35 mmol, 2.0 eq) was added and the reaction stirred for 1 hour. The mixture was diluted with EtOAc (300 mL) and washed with water (2×25 mL) and brine (25 mL), dried (Na2SO4) and concentrated. The product was purified by flash chromatography on silica gel eluted with 8/2 EtOAc/MeOH to provide the product as a brown oil. The product was further purified by trituration with 1/1/1 EtOAc/hexanes/CH2Cl2 and dried under vacuum to provide 3-(5-amino-4-benzoyl-pyrazol-1-yl)-N-cyclopropyl-4-methyl-benzamide 6 (387 mg, 50%) as a white powder: HPLC (4 minute gradient) tR 2.11 min; MS m/z 361 [M+H]+; 1H NMR (CD3OD, 300 MHz) δ 7.92 (d, J=7.6, 1 H), 7.81 (m, 4 H), 7.54 (m, 4 H), 2.85 (m, 1 H), 2.22 (s, 3 H), 0.80 (d, J=5.7, 2 H), 0.63 (s, 2 H) ppm; 13C NMR (CD3OD, 75 MHz) δ 191.2, 170.1, 153.8, 143.3, 142.0, 141.1, 136.9, 134.8, 132.9, 132.7, 130.1, 129.7, 129.2, 128.1, 104.8, 24.1, 17.7, 6.6 ppm.

Workup

  1. additionwas added
  2. washwashed with water (2×25 mL) and brine (25 mL)
  3. dry with materialdried (Na2SO4)
  4. concentrationconcentrated
  5. customThe product was purified by flash chromatography on silica gel
  6. washeluted with 8/2 EtOAc/MeOH

Sources & evidence

ORD record
ord-6c08ad53d42f4628a04be813f7bce712
Source dataset
uspto-grants-2012_08
Patent number
US08242117B2

Reaction notes

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