反应详情

1-(1-Trifluoromethyl-cyclopropanecarbonyl)-piperidine-4-carboxylic acid ethyl ester (50 g; 170.48 mmol) in tetrahydrofuran (350 mL) is added to a solution of 1 M lithium aluminum hydride (170.48 mL; 170.48 mmol) in tetrahydrofuran. The reaction mixture is allowed to warm to room temperature and stirred for 1 h. The reaction mixture is cooled at 0° C. and water/2 M aqueous solution of sodium hydroxide/water (1:3:1) are added sequentially (8.5 mL:12 mL:8.5 mL). The resulting slurry is filtered over a celite® pad and washed with tetrahydrofuran (200 mL). The organic layer is concentrated under controlled vacuum to afford 17 g of the volatile title compound as colorless oil. The crude material is used without further purification. MS (m/z) 238 (M+1).

1. temperatureThe reaction mixture is cooled at 0° C.
2. filtrationThe resulting slurry is filtered over a celite® pad
3. washwashed with tetrahydrofuran (200 mL)
4. concentrationThe organic layer is concentrated under controlled vacuum