反应详情

A solution of 4-chloro-1-(3-pyridinyl)-1-butanone (Example B) (9 g, 0.049 mol), 1-(2-pyridinyl)piperazine (24 g, 0.147 mol), and potassium iodide (0.8 g, 0.005 mol) is heated to 120° C. for 5 minutes. The residue is taken up in chloroform (40 mL) and the precipitate is filtered. The filtrate is evaporated in vacuo and purified by column chromatography (silica gel, 2% methanol/dichloromethane). The major product is crystallized from 2-propanol/diethyl ether to give 6.7 g 1-(3-pyridinyl)-4-[4-(2-pyridinyl)-1-piperazinyl]-1-butanone as a white solid; mp 89° C.

1. filtrationthe precipitate is filtered
2. customThe filtrate is evaporated in vacuo
3. custompurified by column chromatography (silica gel, 2% methanol/dichloromethane)
4. customThe major product is crystallized from 2-propanol/diethyl ether