反应详情

A mixture of N-(4-bromobutyl)-3,3-dimethylglutarimide (4 g., 0.0145 mole) obtained according to the procedure of Example 9, 3-(1-piperazinyl)-1,2-benzisothiazole (3.18 g., 0.0145 mole), anhydrous potassium carbonate (20.04 g., 0.145 mole) and potassium iodide (0.25 g., 0.0015 mole) in 150 ml. of acetonitrile is stirred and refluxed for a period of 12 hr. The reaction mixture is filtered, concentrated in vacuo and residual material triturated with ether. Crystallization of the solid thus obtained from ether affords a 64% yield of analytically pure 1-[4-[4-(1,2-benzisothiazol-3-yl)-1-piperazinyl]butyl]-4,4-dimethyl-2,6-piperidinedione, m.p. 146°-147° C.

1. customobtained
2. temperaturerefluxed for a period of 12 hr
3. filtrationThe reaction mixture is filtered
4. concentrationconcentrated in vacuo and residual material
5. customtriturated with ether
6. customCrystallization of the solid
7. customthus obtained from ether