反应详情

To a solution of 4-hydroxypiperidine-1-carboxylic acid tert-butyl ester (38.28 g) and 4-fluoronitrobenzene (26.84 g) in dimethyl sulfoxide (326 ml) was added 60% sodium hydride (7.99 g) under nitrogen atmosphere and with ice-cooling, and the mixture was stirred at room temperature for 1 hour. After completion of the reaction, water was added and the mixture was extracted with ethyl acetate and washed with water. The organic layer was dried over anhydrous sodium sulfate and the solvent was evaporated. The obtained residue was purified by silica gel column chromatography (hexane:ethyl acetate=10:1) to give the title compound (52.384 g).

1. temperaturewith ice-cooling
2. additionwas added
3. extractionthe mixture was extracted with ethyl acetate
4. washwashed with water
5. dry with materialThe organic layer was dried over anhydrous sodium sulfate
6. customthe solvent was evaporated
7. customThe obtained residue was purified by silica gel column chromatography (hexane:ethyl acetate=10:1)