反应详情

To a solution of tert-butyl 4-(3,3,3-trifluoropropyl)-1-piperazinecarboxylate (5.77 g) in ethyl acetate (13 ml) and methanol (10 ml) was added dropwise 4N hydrogen chloride in ethyl acetate (29 ml) at 0° C. The mixture was warmed to room temperature and stirred for 2 hours. The reaction mixture was diluted with ethyl acetate. The resulting precipitate was collected by filtration, washed with ethyl acetate and dried in vacuo to give the title compound (4.70 g) as a pale yellow solid.

1. filtrationThe resulting precipitate was collected by filtration
2. washwashed with ethyl acetate
3. customdried in vacuo