反应详情

温度

120 °C

To a solution of 5-chloro-2-nitrophenylamine (200 mg, 1.15 mmol) and hexane-2,5-dione (326 μL, 2.78 mmol) in THF (3 mL) was added 1 drop of conc H2SO4. Toluene (3 mL) was then added and the reaction was allowed to stir at 120° C. overnight. At this time the reaction was diluted with CH2Cl2 (50 mL), washed with H2O (2×25 mL), dried (Na2SO4) and concentrated in vacuo. Purification by preparative thin layer chromatography (50% EtOAc-hexane) afforded 73 mg (25%) of the title compound as a tan solid. 1H-NMR (CDCl3; 400 MHz): δ 7.96 (d, 1H, J=8.7 Hz), 7.59-7.54 (m, 1H), 7.39 (d, 1H, J=2.0 Hz), 5.92 (s, 2H), 1.97 (s, 6H);

1. washwashed with H2O (2×25 mL)
2. dry with materialdried (Na2SO4)
3. concentrationconcentrated in vacuo
4. customPurification by preparative thin layer chromatography (50% EtOAc-hexane)