Hydroxyamine hydrochloride → 3-(3-Bromophenyl)isoxazol-5-amine
反応式
[Br:1][C:2]1[CH:3]=[C:4]([C:8](=O)[CH2:9][C:10]#[N:11])[CH:5]=[CH:6][CH:7]=1.Cl.[NH2:14][OH:15].CC([O-])=O.[Na+]>CCO.O>[Br:1][C:2]1[CH:3]=[C:4]([C:8]2[CH:9]=[C:10]([NH2:11])[O:15][N:14]=2)[CH:5]=[CH:6][CH:7]=1参加物
6
実験手順
To a solution of 3-(3-bromophenyl)-3-oxopropanenitrile (1.12 g; 5.00 mmol; Note 1) in EtOH (20 mL) was added a solution of hydroxylamine hydrochloride (1.74 g; 25 mmol) and NaOAc (2.46 g; 30 mmol) in water (20 mL). The mixture was heated under reflux for 1 h, cooled and concentrated in vacuo. The residue was slurried in 1N NaOH and extracted with Et2O (×1). The organic layer was washed (water, brine), dried over Na2SO4 and concentrated in vacuo affording the title compound as a pale yellow solid which was used without further purification. LC/MS (method B) 2.21 min, m/z 239, 241 (Br isotopes).