Potassium Carbonate → tert-butyl 3-{[3-(3,5-dichlorophenoxy)-2-oxo-4-(trifluoromethyl)pyridin-1(2H)-yl]methyl}-1H-pyrazolo[3,4-b]pyridine-1-carboxylate

HRID 1952373Notes

Reaction equation

HRID 1952373 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([CH:17]=[C:18]([Cl:20])[CH:19]=1)[O:5][C:6]1[C:7](=[O:16])[NH:8][CH:9]=[CH:10][C:11]=1[C:12]([F:15])([F:14])[F:13].C(=O)([O-])[O-].[K+].[K+].Br[CH2:28][C:29]1[C:37]2[C:32](=[N:33][CH:34]=[CH:35][CH:36]=2)[N:31]([C:38]([O:40][C:41]([CH3:44])([CH3:43])[CH3:42])=[O:39])[N:30]=1>CN(C)C=O.C(OCC)(=O)C>[Cl:1][C:2]1[CH:3]=[C:4]([CH:17]=[C:18]([Cl:20])[CH:19]=1)[O:5][C:6]1[C:7](=[O:16])[N:8]([CH2:28][C:29]2[C:37]3[C:32](=[N:33][CH:34]=[CH:35][CH:36]=3)[N:31]([C:38]([O:40][C:41]([CH3:44])([CH3:43])[CH3:42])=[O:39])[N:30]=2)[CH:9]=[CH:10][C:11]=1[C:12]([F:15])([F:13])[F:14]

Participants

6

Reactant 3

HCID 11430Potassium CarbonateHCID 10828872tert-Butyl 3-(bromomethyl)-1H-pyrazolo[3,4-b]pyridine-1-carboxylateHCID 595297703-(3,5-dichlorophenoxy)-4-(trifluoromethyl)pyridin-2(1H)-one

Product 1

HCID 68513204tert-butyl 3-{[3-(3,5-dichlorophenoxy)-2-oxo-4-(trifluoromethyl)pyridin-1(2H)-yl]methyl}-1H-pyrazolo[3,4-b]pyridine-1-carboxylate

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolvent2×HCID 8857Ethyl AcetateSolvent

Procedure

To a flask charged with 3-(3,5-dichlorophenoxy)-4-(trifluoromethyl)pyridin-2(1H)-one (0.500 g, 1.54 mmol) and potassium carbonate (0.213 g, 1.54 mmol) was added dimethylformamide (5 mL). To this under N2 was added tert-butyl 3-(bromomethyl)-1H-pyrazolo[3,4-b]pyridine-1-carboxylate (0.482 g, 1.54 mmol) as a solution in dimethylformamide (2 mL). This was allowed to stir at room temperature. After 16 hours, the reaction mixture was diluted with ethyl acetate (100 mL), washed with brine (3×50 mL), dried (MgSO4), filtered and the solvent was evaporated under reduced pressure. The residue was purified by column chromatography on a pre-packed silica gel Redi Sep 40 gram column, eluting with 0-50% ethyl acetate in hexanes to afford the title compound. 1H NMR (DMSO-d6) δ 8.72 (d, J=4.5 Hz, 1H), 8.26-8.22 (m, 1H), 8.11 (d, J=7.2 Hz, 1H), 7.43 (dd, J=8.0 Hz, J=4.6 Hz, 1H), 7.30-7.28 (m, 1H), 7.05-7.02 (m, 2H), 6.70 (d, J=7.2 Hz, 1H), 5.60 (s, 2H), 1.62 (s, 9H). HRMS (M+1)=555.0826.

Workup

  1. washwashed with brine (3×50 mL)
  2. dry with materialdried (MgSO4)
  3. filtrationfiltered
  4. customthe solvent was evaporated under reduced pressure
  5. customThe residue was purified by column chromatography on a pre-packed silica gel Redi Sep 40 gram column
  6. washeluting with 0-50% ethyl acetate in hexanes

Sources & evidence

ORD record
ord-3dd913cf587147f8a15aa1a95ee6abf3
Source dataset
uspto-grants-2013_03
Patent number
US08404856B2

Reaction notes

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