Diisopropylethylamine → 2-[2-chloro-4-(trifluoromethyl)phenyl]-1-[1-(4-fluorophenyl)-6,7-dihydro-5H-pyrazolo[4,3-b]pyridin-4-yl]ethanone

HRID 710672Notes

Reaction equation

HRID 710672 reaction equation
[Cl:1][C:2]1[CH:7]=[C:6]([C:8]([F:11])([F:10])[F:9])[CH:5]=[CH:4][C:3]=1[CH2:12][C:13]([OH:15])=O.[F:16][C:17]1[CH:22]=[CH:21][C:20]([N:23]2[C:31]3[CH2:30][CH2:29][CH2:28][NH:27][C:26]=3[CH:25]=[N:24]2)=[CH:19][CH:18]=1.CCN(C(C)C)C(C)C>CN(C=O)C>[Cl:1][C:2]1[CH:7]=[C:6]([C:8]([F:9])([F:10])[F:11])[CH:5]=[CH:4][C:3]=1[CH2:12][C:13]([N:27]1[CH2:28][CH2:29][CH2:30][C:31]2[N:23]([C:20]3[CH:21]=[CH:22][C:17]([F:16])=[CH:18][CH:19]=3)[N:24]=[CH:25][C:26]1=2)=[O:15]

Participants

5

Reactant 3

HCID 81531DiisopropylethylamineHCID 120881852-Chloro-4-trifluoromethylphenylacetic acidHCID 679846101-(4-fluorophenyl)-4,5,6,7-tetrahydro-1H-pyrazolo[4,3-b]pyridine

Product 1

HCID 733360162-[2-chloro-4-(trifluoromethyl)phenyl]-1-[1-(4-fluorophenyl)-6,7-dihydro-5H-pyrazolo[4,3-b]pyridin-4-yl]ethanoneYield 25%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a mixture of 2-[2-chloro-4-(trifluoromethyl)phenyl]acetic acid (59 mg, 0.23 mmol) and 1-(4-fluorophenyl)-4,5,6,7-tetrahydro-1H-pyrazolo[4,3-b]pyridine (50 mg, 0.23 mmol) in DMF (1 mL) was added Hunig's base (59 mg, 0.46 mmol) and 2-(1H-7-azabenzotriazol-1-yl)-1,1,3,3-tetramethyl uranium hexafluorophosphate methanaminium (HATU) (96 mg, 0.2 mmol). The mixture was stirred at room temperature for 1 hour, and then was partitioned between water (4 mL) and ethyl acetate (6 mL). The organic layer was washed with brine and dried (Na2SO4), filtered, concentrated in vacuo, and purified by reverse phase HPLC (C18 column, acetonitrile-H2O with 0.1% TFA as eluent) to give the desired product as a white solid (25 mg, 25%). 1H NMR (400 MHz, CDCl3) δ 8.44 (s, 0.8H), 7.70 (s, 1H), 7.56-7.44 (m, 4H), 7.38 (s, 0.2H), 7.18-7-14 (m, 2H), 4.14 (s, 2H), 3.82 (m, 2H), 2.85 (m, 2H), 2.08 (m, 2H); MS: (ES) m/z calculated for C21H16ClF4N3O [M+H]+ 438.1, found 438.1.

Workup

  1. customwas partitioned between water (4 mL) and ethyl acetate (6 mL)
  2. washThe organic layer was washed with brine
  3. dry with materialdried (Na2SO4)
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo
  6. custompurified by reverse phase HPLC (C18 column, acetonitrile-H2O with 0.1% TFA as eluent)

Sources & evidence

ORD record
ord-c9652976589c49d28e14e17e19bf3ba6
Source dataset
uspto-grants-2015_11
Patent number
US09181241B2

Reaction notes

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