反应详情

温度

0 °C

Cyclopropyl p-fluorophenyl ketone (1.12 g, 6.9 mmol) is added to 3 ml of dimethylsulfoxide (DMSO). The flask is sealed with a septum and the solution stirred and cooled to 0° C. in an ice bath. Anhydrous dimethylamine (3.4 g, 75.5 mmol) is added by syringe and the solution is gradually warmed to room temperature and allowed to stir at room temperature for 72 hrs. The precipitate is filtered and washed with DMSO and ether. Recrystallization from acetone-pentane (1:1) yielded p-N,N-dimethylaminophenyl cyclopropyl ketone as a white crystalline solid (1.22 g, 92.8%); m.p. 139°-141° C.; IR (KBr):158 cm-1 (C=O); NMR (CDCl3) δ:0.99 (m,2H); 1.16 (m,2H ) 2.60 (m,1H); 3.05 (s,6H); 6.67 (d,2H); 7.96 (d,2H).

1. customThe flask is sealed with a septum
2. temperaturethe solution is gradually warmed to room temperature
3. stirringto stir at room temperature for 72 hrs
4. filtrationThe precipitate is filtered
5. washwashed with DMSO and ether
6. customRecrystallization from acetone-pentane (1:1)