N-bromobutanimide → 2-(2-Amino-5-bromophenyl)acetonitrile
Reaction equation
[NH2:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[CH2:8][C:9]#[N:10].[Br:11]N1C(=O)CCC1=O>CN(C)C=O.C(OCC)(=O)C>[NH2:1][C:2]1[CH:7]=[CH:6][C:5]([Br:11])=[CH:4][C:3]=1[CH2:8][C:9]#[N:10]Participants
5
Reactant 2
Product 1
Reagents, catalysts & solvents 2
Conditions
- Temperature
- 0 °C
Procedure
To a cooled solution of (2-aminophenyl)acetonitrile (13 g, 98 mmol) in dimethylformamide (150 mL) at 0° C., was added N-bromosuccinimide (19.3 g, 108 mmol) in to portions for 30 minutes and maintained at 0° C. for 1 hour. The mixture was diluted with ethyl acetate (300 mL) and washed with water (3×100 mL) and saturated sodium chloride (50 mL). The organic layer was dried over anhydrous sodium sulfate and concentrated in vacuo. The obtained crude product was purified by column chromatography (100-200 mesh silica gel) using 10% ethyl acetate in petroleum ether as eluent to afford (2-amino-5-bromophenyl)acetonitrile (11 g, 53%) as solid. 1HNMR (CDCl3) δ 7.35 (s, 1H), 7.25 (d, 1H), 6.65 (d, 1H), 3.7 (br, 2H), 3.52 (s, 2H).
Workup
- washwashed with water (3×100 mL) and saturated sodium chloride (50 mL)
- dry with materialThe organic layer was dried over anhydrous sodium sulfate
- concentrationconcentrated in vacuo
- customThe obtained crude product
- customwas purified by column chromatography (100-200 mesh silica gel)
Sources & evidence
- ORD record
- ord-4e756707a08d4897b5b920ce15586339
- Source dataset
- uspto-grants-2013_08
- Patent number
- US08507681B2
Reaction notes
Loading…