反应详情

3-Aminocyclohexenone (5.55 g, 50 mmol) and 3-dimethylaminopropiophenone hydrochloride (10.65 g, 50 mmol) were suspended in glacial acetic acid (15 mL) and heated at reflux for 1 h. The mixture was cooled to room temperature and cautiously poured into 20% aqueous sodium carbonate. After gas evolution ceased the residue was extracted with chloroform, dried over anhydrous sodium carbonate, filtered and evaporated. Purification by chromatography on silica gel using 1:1 chloroform/dichloromethane as eluant provided 2.95 g (26%) of 2-phenyl-7,8-dihydroquinolin-5(6H)-one as an off-white solid, mp 128°-130 ° C.; 1H NMR (CDCl3) δ8.32 (d, 1H), 8.05 (dd, 2H), 7.66 (d, 2H), 7.55-7.42 (m,3H), 3.21 (t, 2H), 2.72 (t, 2H), 2.22 (m, 2H).

1. temperatureheated
2. temperatureat reflux for 1 h
3. extractionwas extracted with chloroform
4. dry with materialdried over anhydrous sodium carbonate
5. filtrationfiltered
6. customevaporated
7. customPurification by chromatography on silica gel using 1:1 chloroform/dichloromethane as eluant