Sodium hydride → [1-(4-Methoxy-phenyl)-7-oxo-3-trifluoromethyl-1,4,5,7-tetrahydro-pyrazolo[3,4-c]pyridin-6-yl]-acetic acid methyl ester

HRID 720434Notes

Reaction equation

HRID 720434 reaction equation
[CH3:1][O:2][C:3]1[CH:8]=[CH:7][C:6]([N:9]2[C:13]3[C:14](=[O:18])[NH:15][CH2:16][CH2:17][C:12]=3[C:11]([C:19]([F:22])([F:21])[F:20])=[N:10]2)=[CH:5][CH:4]=1.[H-].[Na+].Br[CH2:26][C:27]([O:29][CH3:30])=[O:28]>CN(C)C=O>[CH3:30][O:29][C:27](=[O:28])[CH2:26][N:15]1[CH2:16][CH2:17][C:12]2[C:11]([C:19]([F:22])([F:20])[F:21])=[N:10][N:9]([C:6]3[CH:5]=[CH:4][C:3]([O:2][CH3:1])=[CH:8][CH:7]=3)[C:13]=2[C:14]1=[O:18]

Participants

5

Reactant 3

HCID 24758Sodium hydrideHCID 60984Methyl bromoacetateHCID 218914731-(4-Methoxy-phenyl)-3-trifluoromethyl-1,4,5,6-tetrahydro-pyrazolo[3,4-c]pyridin-7-one

Product 1

HCID 10339907[1-(4-Methoxy-phenyl)-7-oxo-3-trifluoromethyl-1,4,5,7-tetrahydro-pyrazolo[3,4-c]pyridin-6-yl]-acetic acid methyl esterYield 74%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
0 °C

Procedure

Part D: 1-(4-Methoxy-phenyl)-3-trifluoromethyl-1,4,5,6-tetrahydro-pyrazolo[3,4-c]pyridin-7-one (1.0 g, 3.213 mmol) was dissolved in N,N-dimethylformamide (20 mL) and cooled to 0° C. Sodium hydride (60%, 0.321 g, 8.032 mmol) was added followed by methyl bromoacetate (0.608 mL, 6.425 mmol). The reaction was stirred at rt overnight. The reaction was quenched with 1N hydrochloric acid (100 mL), extracted with ethyl acetate (3×100 mL), washed with water (2×100 mL), washed with brine (1×100 mL), dried over MgSO4, concentrated, and purified by flash chromatography using 0–100% ethyl acetate/hexanes gradient as the eluent to afford the title compound (0.91 g, 74%): 1H NMR (CDCl3) δ 7.45 (d, j=8.8 Hz, 2H), 6.96 (d, j=9.2 Hz, 2H), 4.25 (s, 2H), 3.84 (s, 3H), 3.78 (t, j=7.0 Hz, 2H), 3.75 (m, 3H), 3.02 (t, j=6.8 Hz, 2H) ppm.

Workup

  1. customThe reaction was quenched with 1N hydrochloric acid (100 mL)
  2. extractionextracted with ethyl acetate (3×100 mL)
  3. washwashed with water (2×100 mL)
  4. washwashed with brine (1×100 mL)
  5. dry with materialdried over MgSO4
  6. concentrationconcentrated
  7. custompurified by flash chromatography

Sources & evidence

ORD record
ord-6da1089b6e84453e810c0f66a18c1173
Source dataset
uspto-grants-2006_11
Patent number
US07135469B2

Reaction notes

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