Acetonitrile → [4-(6-Fluoro1H-indazol-3-yl)-1-piperazinyl]acetonitrile

HRID 1873052Notes

Reaction equation

HRID 1873052 reaction equation
[F:1][C:2]1[CH:10]=[C:9]2[C:5]([C:6]([N:11]3[CH2:16][CH2:15][NH:14][CH2:13][CH2:12]3)=[N:7][NH:8]2)=[CH:4][CH:3]=1.C([O-])(O)=O.[Na+].[CH3:22][C:23]#[N:24]>>[F:1][C:2]1[CH:10]=[C:9]2[C:5]([C:6]([N:11]3[CH2:12][CH2:13][N:14]([CH2:22][C:23]#[N:24])[CH2:15][CH2:16]3)=[N:7][NH:8]2)=[CH:4][CH:3]=1

Participants

4

Reactant 3

HCID 6342AcetonitrileHCID 516892Sodium BicarbonateHCID 98158716-fluoro-3-piperazin-1-yl-1H-indazole

Product 1

HCID 15337664[4-(6-Fluoro1H-indazol-3-yl)-1-piperazinyl]acetonitrileYield 999.9%

Procedure

A mixture of 6-fluoro-3-(4-piperazinyl)-1H-indazole (6.0 g, 2.7 mmol), NaHCO3 (2.5 g, 3.0 mmol) chloroacetonitrile (2.5 g, 3.3 mmol) and CH3CN (150 mol) was stirred at reflux under N2 for 18 hours. The cooled reaction was poured into H2 and the aqueous solution was extracted with EtOAc. The EtOAc extract was washed with H2O, washed with brine, dried with MgSO4 and concentrated to yield 7.0 g of a tan solid. A 1.3 g sample was recrystallized from EtOAc to yield 0.65 g of a beige solid, m.p. 154-156° C.

Workup

  1. temperatureat reflux under N2 for 18 hours
  2. customThe cooled reaction
  3. additionwas poured into H2
  4. extractionthe aqueous solution was extracted with EtOAc
  5. extractionThe EtOAc extract
  6. washwas washed with H2O
  7. washwashed with brine
  8. dry with materialdried with MgSO4
  9. concentrationconcentrated

Sources & evidence

ORD record
ord-5819f8a54c8346fea514fb30fa3915c0
Source dataset
uspto-grants-2000_08
Patent number
US06110938

Reaction notes

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