反应详情

温度

100 °C

A mixture of 4-bromo-2-methyl-6-nitro-phenylamine (5 g, 21.64 mmol), 1-acetylpiperazine (4.2 g, 32.46 mmol), palladium acetate (244 mg, 1.08 mmol), tri-tert-butylphosphine (440 mg, 2.16 mmol) and sodium tert-butoxide (4.2 g, 43.29 mmol) in toluene (70 mL) was heated to 100° C. for 14 h under nitrogen. The reaction mixture was cooled to room temperature and diluted with EtOAc. After extraction, the combined organic layers were washed with water, brine, dried over Na2SO4. Concentration gave a brownish residue which was purified by flash column chromatography (10% MeOH/CH2Cl2) to yield the title compound (4.21 g, 70%). 1H NMR (400 MHz, CD3OD) δ 7.42 (1H, d, J=2.8 Hz), 7.23 (1H, d, J=2.8 Hz), 3.71 (2H, t, J=5.1 Hz), 3.67 (2H, t, J=5.1 Hz), 3.04 (2H, t, J=5.2 Hz), 2.98 (2H, t, J=5.2 Hz), 2.24 (3H, s), 2.31 (3H, s). LCMS (M+H)+ m/z 279 (t=1.46 min.).

1. temperatureThe reaction mixture was cooled to room temperature
2. extractionAfter extraction
3. washthe combined organic layers were washed with water, brine
4. dry with materialdried over Na2SO4
5. concentrationConcentration
6. customgave a brownish residue which
7. customwas purified by flash column chromatography (10% MeOH/CH2Cl2)