反应详情

温度

110 °C

6-(trifluoromethyl)-1,2-dihydroquinolin-2-one (1.0 g, 4.7 mmol) was dissolved in POCl3 (15 ml) and stirred for 2 h at 110° C. (oil bath). The resulting mixture was dissolved in ice-water (100 ml) and adjusted pH to 8 with aqueous Na2CO3 solution (3N). The crude product was then extracted with dichloromethane (3×80 ml) and the organic layers were combined, dried over anhydrous magnesium sulfate, filtered, and concentrated under vacuum to afford 2-chloro-6-(trifluoromethyl)quinoline as a dark red solid (944 mg, 87%). (ES, m/z): [M+H]+ 232. 1H NMR (300 MHz, DMSO): δ 8.59-8.66 (m, 2H), 8.01-8.17 (m, 2H), 7.75 (d, J=8.7 Hz, 1H).

1. extractionThe crude product was then extracted with dichloromethane (3×80 ml)
2. dry with materialdried over anhydrous magnesium sulfate
3. filtrationfiltered
4. concentrationconcentrated under vacuum