Water → 4,6-Bis(4-fluorophenyl)-5-(4-pyridyl)-1H-pyrazolo[3,4-b]pyridine-3-carboxamide

HRID 42584Notes

Reaction equation

HRID 42584 reaction equation
[OH-].[K+].[F:3][C:4]1[CH:9]=[CH:8][C:7]([C:10]2[C:15]([C:16]3[CH:21]=[CH:20][N:19]=[CH:18][CH:17]=3)=[C:14]([C:22]3[CH:27]=[CH:26][C:25]([F:28])=[CH:24][CH:23]=3)[N:13]=[C:12]3[NH:29][N:30]=[C:31]([C:32]#[N:33])[C:11]=23)=[CH:6][CH:5]=1.O.CC[O:37]C(C)=O>CC(O)(C)C>[F:3][C:4]1[CH:9]=[CH:8][C:7]([C:10]2[C:15]([C:16]3[CH:21]=[CH:20][N:19]=[CH:18][CH:17]=3)=[C:14]([C:22]3[CH:27]=[CH:26][C:25]([F:28])=[CH:24][CH:23]=3)[N:13]=[C:12]3[NH:29][N:30]=[C:31]([C:32]([NH2:33])=[O:37])[C:11]=23)=[CH:6][CH:5]=1

Participants

6

Reactant 4

HCID 962WaterHCID 8857Ethyl AcetateHCID 14797Potassium HydroxideHCID 178510687HCID 178510687, compound

Product 1

HCID 1785138434,6-Bis(4-fluorophenyl)-5-(4-pyridyl)-1H-pyrazolo[3,4-b]pyridine-3-carboxamideYield 28%

Reagents, catalysts & solvents 1

HCID 6386tert-ButanolSolvent

Procedure

A solution of KOH (0.07 g, 1.3 mmol) in tBuOH (2.5 mL) was added under argon atmosphere to 4,6-bis(4-fluorophenyl)-5-(4-pyridyl)-1H-pyrazolo[3,4-b]pyridine-3-carbonitrile (0.05 g, 0.1 mmol, obtained in example 65) and heated to reflux overnight. Water and EtOAc were added and the phases were separated. The aqueous phase was extracted with EtOAc. The combined organic phases were dried over Na2SO4 and concentrated to dryness. The crude product obtained was purified by chromatography on silica gel using hexane-EtOAc mixtures of increasing polarity as eluent, to afford 15 mg of the title compound in solid form (yield: 28%)

Workup

  1. temperatureheated
  2. temperatureto reflux overnight
  3. customthe phases were separated
  4. extractionThe aqueous phase was extracted with EtOAc
  5. dry with materialThe combined organic phases were dried over Na2SO4
  6. concentrationconcentrated to dryness
  7. customThe crude product obtained
  8. customwas purified by chromatography on silica gel
  9. temperatureof increasing polarity as eluent

Sources & evidence

ORD record
ord-ea73eb172f8442a990b7e9197ccadc71
Source dataset
uspto-grants-2013_09
Patent number
US08536194B2

Reaction notes

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