1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → 1-phenyl-1H-pyrazole-4-carboxylic acid {2-[4-(2-chloro-phenoxy)-piperidin-1-yl]-2-oxo-ethyl}-amide

HRID 1093768Notes

Reaction equation

HRID 1093768 reaction equation
CCN(C(C)C)C(C)C.[C:10]1([N:16]2[CH:20]=[C:19]([C:21]([OH:23])=O)[CH:18]=[N:17]2)[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=1.C1C=CC2N(O)N=NC=2C=1.CCN=C=NCCCN(C)C.Cl.[NH2:46][CH2:47][C:48]([N:50]1[CH2:55][CH2:54][CH:53]([O:56][C:57]2[CH:62]=[CH:61][CH:60]=[CH:59][C:58]=2[Cl:63])[CH2:52][CH2:51]1)=[O:49]>CN(C=O)C.O>[Cl:63][C:58]1[CH:59]=[CH:60][CH:61]=[CH:62][C:57]=1[O:56][CH:53]1[CH2:52][CH2:51][N:50]([C:48](=[O:49])[CH2:47][NH:46][C:21]([C:19]2[CH:18]=[N:17][N:16]([C:10]3[CH:11]=[CH:12][CH:13]=[CH:14][CH:15]=3)[CH:20]=2)=[O:23])[CH2:55][CH2:54]1

Participants

8

Reactant 5

HCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 757711-HydroxybenzotriazoleHCID 81531DiisopropylethylamineHCID 1210261-phenyl-1H-pyrazole-4-carboxylic acidHCID 665915282-Amino-1-[4-(2-chloro-phenoxy)-piperidin-1-yl]-ethanone hydrochloride

Product 1

HCID 578743881-phenyl-1H-pyrazole-4-carboxylic acid {2-[4-(2-chloro-phenoxy)-piperidin-1-yl]-2-oxo-ethyl}-amideYield 46.9%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

DIPEA (223 mg, 0.3 mL, 1.72 mmol) was added to a stirred solution of 1-phenyl-1H-pyrazole-4-carboxylic acid (65 mg, 0.34 mmol) in DMF (5 mL) followed by HOBt (51 mg, 0.38 mmol) and EDCI (165 mg, 0.86 mmol). After 2 minutes of stirring, 2-amino-1-[4-(2-chloro-phenoxy)-piperidin-1-yl]-ethanone hydrochloride salt (116 mg, 0.38 mmol) (prepared according to Step 1 and 5 of the General Scheme) was added and the resulting mixture was stirred at room temperature overnight. 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. The residue was purified by column chromatography (using 60-120 silica gel and 70% EtOAc in hexane as eluent) to afford 70 mg (46.35% yield) of 1-phenyl-1H-pyrazole-4-carboxylic acid {2-[4-(2-chloro-phenoxy)-piperidin-1-yl]-2-oxo-ethyl}-amide. LC/MS [M+H]+: 439.15, 95.23%. 1H NMR (300 MHz, CDCl3): δ 8.4 (s, 1H), 8.06 (s, 1H), 7.76 (d, 2H), 7.54 (t, 2H), 7.42 (m, 2H), 7.2 (d, 1H), 7.1 (t, 1H), 7.0 (t, 2H), 4.7 (t, 1H), 4.4-4.2 (m, 2H), 4.1 (m, 1H), 3.8-3.5 (m, 2H), δ 3.5 (m, 1H), 2.1-1.8 (m, 4H).

Workup

  1. additionwas added
  2. stirringthe resulting mixture was stirred at room temperature overnight
  3. extractionthe product was extracted with EtOAc
  4. washthe organic layer was washed with brine
  5. dry with materialThe organic phase was dried over Na2SO4
  6. concentrationconcentrated under reduced pressure
  7. customThe residue was purified by column chromatography (using 60-120 silica gel and 70% EtOAc in hexane as eluent)

Sources & evidence

ORD record
ord-8765babd9adb4f4fb3870d461f672b0a
Source dataset
uspto-grants-2012_03
Patent number
US08129376B2

Reaction notes

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