Chloroform → 2,6-Piperidinedione, 1-[3-[4-(2-methoxyphenyl)-1-piperazinyl]propyl]-

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Reaction Conditions

Reaction Steps

Scheme-I: A mixture of 2,6-dioxopiperidine (2.60 g, 23.02 mmol), 1-[4-(2-methoxyphenyl)-piperazin-1-yl]-3-chloropropane (6.18 g, 23.02 mmol), potassium carbonate (2.38 g, 17.27 mmol) and tetrabutylammonium bromide (1.48 g, 4.60 mmol) in acetone (80 ml) was refluxed for 16 hours at 80° C. with stirring. The solvent was evaporated off in vaccuo and the residue suspended in water (60 ml), extracted with chloroform (3×40 mmol) and the organic layers combined, washed with water (2.40 ml), dried over anhydrous Na2SO4 and evaporated in vacuo to give the title compound. The product was purified by column chromatography over flash silica gel (230-400 mesh) using chloroform-methanol (98:1) as eluent; yield 3.58 g (45%), oil. The hydrochloride salt was prepared in the quantitative yield by the method described above; m.p. 206-210° C.

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