N-bromobutanimide → 3-Bromo-6-fluoro-2-methylbenzonitrile
Reaction equation
[F:1][C:2]1[CH:9]=[CH:8][CH:7]=[C:6]([CH3:10])[C:3]=1[C:4]#[N:5].C1C(=O)N([Br:18])C(=O)C1>OS(O)(=O)=O>[Br:18][C:7]1[C:6]([CH3:10])=[C:3]([C:2]([F:1])=[CH:9][CH:8]=1)[C:4]#[N:5]Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Conditions
- Temperature
- 0 °C
Procedure
To a cooled (0° C.) solution of 2-fluoro-6-methylbenzonitrile (5.0 g, 37 mmol) in 100 mL of concentrated H2SO4 was added NBS (6.93 g, 38.9 mmol). Then the mixture was stirred at 0° C. for 3 hrs and poured into ice-water (1 L). The solution was extracted three times with EtOAc (200 mL) and the combined organic layers were washed with water and brine, dried over anhydrous sodium sulfate, filtered and concentrated. The residue was purified by silica gel flash chromatography to give 3-bromo-6-fluoro-2-methylbenzonitrile.
Workup
- extractionThe solution was extracted three times with EtOAc (200 mL)
- washthe combined organic layers were washed with water and brine
- dry with materialdried over anhydrous sodium sulfate
- filtrationfiltered
- concentrationconcentrated
- customThe residue was purified by silica gel flash chromatography
Sources & evidence
- ORD record
- ord-5cfb2e0c5b854581b10ad8f201b5d1a7
- Source dataset
- uspto-grants-2014_03
- Patent number
- US08673920B2
Reaction notes
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