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

HRID 976800Notes

Reaction equation

HRID 976800 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]>O>[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

5

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%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

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 H2O 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. extractionthe aqueous solution was extracted with EtOAc
  4. extractionThe EtOAc extract
  5. washwas washed with H2O
  6. washwashed with brine
  7. dry with materialdried with MgSO4
  8. concentrationconcentrated

Sources & evidence

ORD record
ord-6ea9bf559d604cd6909d2fcc0cd4a6b5
Source dataset
uspto-grants-1997_03
Patent number
US05612342

Reaction notes

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