Sodium borohydride → 2,6-Difluoro-4-(hydroxymethyl)benzonitrile

HRID 505012Notes

Reaction equation

HRID 505012 reaction equation
[F:1][C:2]1[CH:9]=[C:8]([CH:10]=[O:11])[CH:7]=[C:6]([F:12])[C:3]=1[C:4]#[N:5].[BH4-].[Na+]>CO>[F:1][C:2]1[CH:9]=[C:8]([CH2:10][OH:11])[CH:7]=[C:6]([F:12])[C:3]=1[C:4]#[N:5]

Participants

4

Reactant 2

HCID 4311764Sodium borohydrideHCID 219046552,6-Difluoro-4-formylbenzonitrile

Product 1

HCID 219046292,6-Difluoro-4-(hydroxymethyl)benzonitrile

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

2,6-Difluoro-4-formylbenzonitrile (1.36 g, 8.13 mmol; see step (ii) above) was dissolved in 25 mL of methanol and cooled on an ice bath. Sodium borohydride (0.307 g, 8.12 mmol) was added in portions with stirring and the reaction was left for 65 min. The solvent was evaporated and the residue was partitioned between diethyl ether and aqueous sodium bicarbonate. The ethereal layer was washed with more aqueous sodium bicarbonate and brine, dried (Na2SO4) and evaporated. The crude product crystallised soon and could be used without further purification.

Workup

  1. temperaturecooled on an ice bath
  2. customThe solvent was evaporated
  3. customthe residue was partitioned between diethyl ether and aqueous sodium bicarbonate
  4. washThe ethereal layer was washed with more aqueous sodium bicarbonate and brine
  5. dry with materialdried (Na2SO4)
  6. customevaporated
  7. customThe crude product crystallised soon
  8. customcould be used without further purification

Sources & evidence

ORD record
ord-79369030234b4b8d968d7b38884fa0de
Source dataset
uspto-grants-2010_08
Patent number
US07781424B2

Reaction notes

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