反应详情

To a stirring solution of tert-butyl 3-oxopiperazine-1-carboxylate (9.99 mmol, 2 g) in dry N-methyl-2-pyrrolidinone (2 mL) was added sodium hydride (30.0 mmol, 1.198 g). The mixture was stirred at room temperature under nitrogen for 20 min before the addition of 2-(4-(bromomethyl)phenyl)-1,1,1,3,3,3-hexafluoropropan-2-ol (10.99 mmol, 3.70 g). The mixture was stirred for a further 14 hours. The reaction mixture was diluted with ethyl acetate (100 mL) and washed with water (4×75 mL). The organic phase was dried over magnesium sulfate, filtered and the filtrate concentrated. The resulting residue was purified by column chromatography on silica gel (eluting with dichloromethane—3.5% methanol/96.5% dichloromethane gradient) to afford the title compound (1.44 g).

1. washwashed with water (4×75 mL)
2. dry with materialThe organic phase was dried over magnesium sulfate
3. filtrationfiltered
4. concentrationthe filtrate concentrated
5. customThe resulting residue was purified by column chromatography on silica gel (eluting with dichloromethane—3.5% methanol/96.5% dichloromethane gradient)