反应详情

A solution of 4-[4-(4-Octyloxyphenyl)piperazin-1-yl]benzonitrile (0.5 g) in 20% H2SO4 aqueous solution (30 ml) and acetic acid (20 ml) was refluxed for 9 hours. The reaction mixture was pulverized with water. The precipitate was collected by filtration, and added to a mixture of water, tetrahydrofuran and ethyl acetate, and adjusted to pH 2.5 with 1N NaOH aqueous solution. The organic layer was taken, and dried over magnesium sulfate. The magnesium sulfate was filtered off, and the filtrate was evaporated under reduced pressure to give 4-[4-(4-Octyloxyphenyl)piperazin-1-yl]benzoic acid (388 mg).

1. filtrationThe precipitate was collected by filtration
2. additionadded to a mixture of water, tetrahydrofuran and ethyl acetate
3. dry with materialdried over magnesium sulfate
4. filtrationThe magnesium sulfate was filtered off
5. customthe filtrate was evaporated under reduced pressure