反应详情

A mixture of 2-(2,2,2-trifluoroethoxy)aniline (2.85 g, 14.9 mmol), bis(2-chloroethyl)amine hydrochloride (2.66 g, 14.9 mmol), potassium carbonate (2.06 g, 14.9 mmol), sodium iodide (0.45 g, 3 mmol) and bis(2-methoxyethyl) ether (7.3 mL) was heated 8 hours at reflux. The reaction mixture then was cooled, treated with concentrated ammonium hydroxide, poured into water (30 mL) and extracted with ethyl acetate (3×30 mL). The combined extracts were washed with water (2×30 mL) and brine (1×30 mL), dried (MgSO4) and concentrated in vacuo. The residue was purified by column chromatography on silica gel eluting with methylene chloride/methanol (95:5) to give 1-[2-(2,2,2-trifluoroethoxy)phenyl]piperazine (2.93 g, 11.2 mmol), m.p. 107°-108° C.

1. temperaturewas heated 8 hours
2. temperatureat reflux
3. temperatureThe reaction mixture then was cooled
4. extractionextracted with ethyl acetate (3×30 mL)
5. washThe combined extracts were washed with water (2×30 mL) and brine (1×30 mL)
6. dry with materialdried (MgSO4)
7. concentrationconcentrated in vacuo
8. customThe residue was purified by column chromatography on silica gel eluting with methylene chloride/methanol (95:5)