反应详情

A mixture of 1-(2-pyrimidinyl)piperazine (32.8 g; 0.2 mole), 1,4-dibromobutane (108 g; 0.5 mole) and finely powdered sodium carbonate (21.2 g, 0.2 mole) in 400 mL isopropanol was stirred and refluxed for a 16 hr period. The hot reaction mixture was filtered and the filtrate, on standing at room temperature, provided 50.3 g (84% yield) of product. Crystallization of this material from isopropanol affords analytically pure product, m.p. 241.5°-242.5° C. (corr.).

1. temperaturerefluxed for a 16 hr period
2. filtrationThe hot reaction mixture was filtered
3. customon standing at room temperature