反应详情

温度

50 °C

w To a solution of 2-bromo-cyclohexane-1,3-dione (20 g, 0.105 mol) in pyridine (150 mL) was added thioacetamide (7.9 g, 0.105 mol) and the mixture was stirred at 50° C. After 16 h the solvent was removed under vacuum. 10% aq NaCl solution (150 mL) was added and the product was extracted with CH2Cl2 (4×100 mL). The organic extracts were washed with additional 10% aq NaCl solution (2×100 mL) before being dried, filtered, and concentrated under vacuum. The dark viscous oil obtained was purified using a Kugelrohr distillation unit to afford the product as a yellow oil (6.97 g, 40%): 1H-NMR (CDCl3): δ 3.02 (t, 2H, J 6.1, CH2), 2.75 (s, 3H, CH3), 2.61 (t, 2H, J 6.1, CH2), 2.21 (qu, 2H, J 6.1, CH2). 13C-NMR (CDCl3): δ 192.1, 173.3, 166.8, 130.9, 37.8, 27.1, 23.1, 20.0. MS (ESI+): m/z 168.03 (M+H)+.

1. customAfter 16 h the solvent was removed under vacuum
2. addition10% aq NaCl solution (150 mL) was added
3. extractionthe product was extracted with CH2Cl2 (4×100 mL)
4. washThe organic extracts were washed with additional 10% aq NaCl solution (2×100 mL)
5. custombefore being dried
6. filtrationfiltered
7. concentrationconcentrated under vacuum
8. customThe dark viscous oil obtained
9. customwas purified
10. distillationa Kugelrohr distillation unit