反应详情

A mixture of (2R)-1-[3,5-bis(trifluoromethyl)benzoyl]-2-(3,4-dimethylbenzyl)-4-(4-chloro-2-butynyl)piperazine (0.49 g), 3-methylmorpholine hydrochloride (0.15 g), potassium carbonate (0.39 g) and potassium iodide (10 mg) in dry N,N-dimethylformamide (5 ml) was stirred for 5 hours at room temperature. The mixture was poured into water and extracted with ethyl acetate. The extract was washed with brine, dried over magnesium sulfate and evaporated under reduced pressure. The residue was purified by column chromatography on silica gel using ethyl acetate as eluent and treated with 4N hydrogen chloride in ethyl acetate solution to give (2R)-1-[3,5-bis(trifluoromethyl)benzoyl]-2-(3,4-dimethylbenzyl)-4-[4-(3-methylmorpholino)-2-butynyl]piperazine dihydrochloride (0.28 g).

1. extractionextracted with ethyl acetate
2. washThe extract was washed with brine
3. dry with materialdried over magnesium sulfate
4. customevaporated under reduced pressure
5. customThe residue was purified by column chromatography on silica gel
6. additiontreated with 4N hydrogen chloride in ethyl acetate solution