Acetic Acid → 5-Fluoro-1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b]pyridine-3-carboximidamide acetate

HRID 1615941Notes

Reaction equation

HRID 1615941 reaction equation
[F:1][C:2]1[CH:3]=[C:4]2[C:10]([C:11]#[N:12])=[N:9][N:8]([CH2:13][C:14]3[CH:19]=[CH:18][CH:17]=[CH:16][C:15]=3[F:20])[C:5]2=[N:6][CH:7]=1.C[O-].[Na+].[Cl-].[NH4+:25].[C:26]([OH:29])(=[O:28])[CH3:27]>CO>[C:26]([OH:29])(=[O:28])[CH3:27].[F:1][C:2]1[CH:3]=[C:4]2[C:10]([C:11](=[NH:25])[NH2:12])=[N:9][N:8]([CH2:13][C:14]3[CH:19]=[CH:18][CH:17]=[CH:16][C:15]=3[F:20])[C:5]2=[N:6][CH:7]=1

Participants

6

Reactant 4

HCID 176Acetic AcidHCID 25517Ammonium ChlorideHCID 10942334Sodium MethoxideHCID 568467435-Fluoro-1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b]pyridine-3-carbonitrile

Product 1

HCID 666833225-Fluoro-1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b]pyridine-3-carboximidamide acetate

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

11.1 g (41.07 mmol) of 5-fluoro-1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b]pyridine-3-carbonitrile (Example 8A) were added to 2.22 g (41.07 mmol) of sodium methoxide in methanol (270 ml), and the mixture was stirred at RT for 2 h. 2.64 g (49.29 mmol) of ammonium chloride and acetic acid (9.17 ml) were then added, and the mixture was heated to reflux overnight. It was then concentrated to dryness and the residue was taken up in water (100 ml) and ethyl acetate (100 ml) and adjusted to a pH of 10 using 2N aqueous sodium hydroxide solution. The mixture was stirred vigorously at RT for about 1 h. The resulting suspension was filtered with suction and washed through with ethyl acetate (100 ml), with water (100 ml) and once more with ethyl acetate (100 ml). The residue was dried under high vacuum over phosphorus pentoxide.

Workup

  1. temperaturethe mixture was heated
  2. temperatureto reflux overnight
  3. concentrationIt was then concentrated to dryness
  4. stirringThe mixture was stirred vigorously at RT for about 1 h
  5. filtrationThe resulting suspension was filtered with suction
  6. washwashed through with ethyl acetate (100 ml), with water (100 ml) and once more with ethyl acetate (100 ml)
  7. dry with materialThe residue was dried under high vacuum over phosphorus pentoxide

Sources & evidence

ORD record
ord-cb35a34a41124110b41a6b3ec290961b
Source dataset
uspto-grants-2014_07
Patent number
US08765769B2

Reaction notes

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