Hydrochloric Acid → 2-{[1-Bromo-6-(3-pentanoyl-1-benzofuran-2-yl)-2-naphthyl]oxy}acetonitrile

HRID 1359194Notes

Reaction equation

HRID 1359194 reaction equation
[Br:1][C:2]1[C:11]([OH:12])=[CH:10][CH:9]=[C:8]2[C:3]=1[CH:4]=[CH:5][C:6]([C:13]1[O:14][C:15]3[CH:27]=[CH:26][CH:25]=[CH:24][C:16]=3[C:17]=1[C:18](=[O:23])[CH2:19][CH2:20][CH2:21][CH3:22])=[CH:7]2.[H-].[Na+].Br[CH2:31][C:32]#[N:33].Cl>CN(C=O)C.O>[Br:1][C:2]1[C:3]2[C:8](=[CH:7][C:6]([C:13]3[O:14][C:15]4[CH:27]=[CH:26][CH:25]=[CH:24][C:16]=4[C:17]=3[C:18](=[O:23])[CH2:19][CH2:20][CH2:21][CH3:22])=[CH:5][CH:4]=2)[CH:9]=[CH:10][C:11]=1[O:12][CH2:31][C:32]#[N:33]

Participants

7

Reactant 4

HCID 313Hydrochloric AcidHCID 11534BromoacetonitrileHCID 24758Sodium hydrideHCID 113846851-[2-(5-Bromo-6-hydroxy-2-naphthyl)-1-benzofuran-3-yl]-1-pentanone

Product 1

HCID 114198352-{[1-Bromo-6-(3-pentanoyl-1-benzofuran-2-yl)-2-naphthyl]oxy}acetonitrileYield 60%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

To an ice-cooled solution of 1-[2-(5-bromo-6-hydroxy-2-naphthyl)-1-benzofuran-3-yl]-1-pentanone (1.2 g, 2.8 mmol) in dry DMF (12 mL) was added sodium hydride (0.315 g, 7.88 mmol of a 60% dispersion on mineral oil) in three portions. Bromoacetonitrile (0.49 mL, 7.0 mmol) was added and the mixture was stirred at room temperature for 1.5 hours, then poured into excess water and acidified with 2N hydrochloric acid. The mixture was extracted with ethyl acetate, washed with brine, dried over anhydrous magnesium sulfate, filtered and concentrated. The residue was purified by flash chromatography (Biotage apparatus) using 15% tert-butyl methyl ether in hexane as an eluant to afford 2-{[1-bromo-6-(3-pentanoyl-1-benzofuran-2-yl)-2-naphthyl]oxy}acetonitrile as a yellow solid (0.776 g, 60%), mp 98-100° C.

Workup

  1. extractionThe mixture was extracted with ethyl acetate
  2. washwashed with brine
  3. dry with materialdried over anhydrous magnesium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated
  6. customThe residue was purified by flash chromatography (Biotage apparatus)

Sources & evidence

ORD record
ord-145f6895d0394403b9ccb92ea3cbf7a6
Source dataset
uspto-grants-2003_07
Patent number
US06599925B2

Reaction notes

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