反应详情

A solution of 1-(2-chlorophenyl)-3-(dimethylamino)propan-1-one HCl salt (5.17 g, 20.85 mmol) and 3-bromoaniline (2.27 mL, 1 equiv) in 1:1 ethanol/water (21 mL, 1.0M) was heated at reflux overnight. LC-MS found the starting material was gone. The reaction mixture was cooled to rt. The ethanol was removed in vacuo. The residue was partitioned between EtOAc and water. The organic layer was washed with 1% aq HCl (2×30 mL), satd aq NaHCO3 solution (20 mL), brine (20 mL), and dried over Na2SO4. After filtration and concentration, the residue (6.08 g) was purified by chromatography on a 120-g silica cartridge to afford 3-(3-bromophenylamino)-1-(2-chlorophenyl)propan-1-one (2.75 g, 40% yield) as an orange oil. LC-MS (3 min) tR=2.03 min, m/z=340, 341(M+1); 1H NMR (CDCl3) δ 7.47(d, 1H), 7.44-7.38 (m, 2H), 7.33 (td, 1H), 7.00 (m, 1H), 6.84 (m, 1H), 6.77 (s, 1H), 6.56 (m, 1H).

1. temperatureat reflux overnight
2. customThe ethanol was removed in vacuo
3. customThe residue was partitioned between EtOAc and water
4. washThe organic layer was washed with 1% aq HCl (2×30 mL)
5. dry with materialdried over Na2SO4
6. filtrationAfter filtration and concentration
7. customthe residue (6.08 g) was purified by chromatography on a 120-g silica cartridge