反应详情

温度

77 °C

To a solution of 1-tert-butoxycarbonylpiperidine-4-carbothioamide (1 g, 4.10 mmol) in ethanol (10 mL) was added 2-chloro-1-[4,5-dihydro-5-(2-fluorophenyl)-3-isoxazolyl]ethanone (i.e. the product of Step A) (0.99 g) followed by pyridine (0.34 mL, 4.10 mmol). The reaction mixture was heated at 77° C. for 3 h, and then stirred at room temperature overnight. Ethanol was removed from the reaction mixture, and the remaining residue was diluted with ethyl acetate (50 mL). The organic layer was separated, washed with water, saturated aqueous sodium chloride solution, dried (MgSO4) and concentrated under reduced pressure. The resulting oil was purified by column chromatography on silica gel to provide the title compound as a pale yellow sticky oil (1.11 g).

1. customEthanol was removed from the reaction mixture
2. additionthe remaining residue was diluted with ethyl acetate (50 mL)
3. customThe organic layer was separated
4. washwashed with water, saturated aqueous sodium chloride solution
5. dry with materialdried (MgSO4)
6. concentrationconcentrated under reduced pressure
7. customThe resulting oil was purified by column chromatography on silica gel