反应 #607469
ord-0e42af724da44b8b86537f57c5e4cc84
反应方程式
反应物
试剂
反应条件
后处理
- 1温度The reaction medium was heated
- 2温度to reflux
- 3其他were slowly removed with assistance from a Dean Stark
- 4其他After the end of the reaction, ethyl acetate (250 mL)
- 5温度The mixture was maintained under agitation for a period of 30 minutes
- 6其他The organic phase was separated
- 7洗涤washed with two portions of 50 mL of NaHCO3 at 5%
- 8干燥dried with MgSO4
- 9其他evaporated at reduced pressure
实验过程
3-(2-chloroethyl)-2-ethylquinazoline-4 (3H)-one (1.5 g; 6.34 mmol), 1-(3-(trifluoromethyl)phenyl)piperazine (1.459 g; 6.34 mmol), sodium carbonate (0.672 g; 6.34 mmol), sodium iodide (0.95 g; 6.34 mmol), ethanol (100 mL) and toluene (200 mL) were added to a 100 mL reactor. The reaction medium was heated to reflux and kept under agitation for a period of 24 hours, during which 250 mL of solvent were slowly removed with assistance from a Dean Stark. The reaction was monitored through CG/MS until completion. After the end of the reaction, ethyl acetate (250 mL) was added, together with an aqueous solution of acetic acid (100 mL; 10%). The mixture was maintained under agitation for a period of 30 minutes. The organic phase was separated, washed with two portions of 50 mL of NaHCO3 at 5%, dried with MgSO4 and evaporated at reduced pressure, yielding a pale yellow colored oil (2.7 g of raw 2-ethyl-3-(2-(4-(3-(trifluoromethyl)phenyl)piperazine-1-yl)ethyl)quinazoline-4 (3H)-one). This oil was dissolved in isopropanol, adding 2.0 mL of concentrated HCl to the resulting solution. The solution was kept under agitation at room temperature, until completing precipitation of the solids. The solids were vacuum filtered, washed with two portions of 5 mL of isopropanol and dried, yielding 2-ethyl-3-(2-(4-(3-(trifluoromethyl)phenyl)piperazine-1-yl)ethyl)quinazoline-4 (3H)-one hydrochloride as a pale white solid (2.36 g, 5.48 mmol, yield: 87%).