反应详情

温度

80 °C

To tert-butyl 4-hydroxypiperidine-1-carboxylate (389 mg, 1.933 mmol) and 2,4-dichloropyrimidine (240 mg, 1.611 mmol) in N,N-dimethylformamide (6.4 mL) was added cesium carbonate (1050 mg, 3.22 mmol) and the mixture was heated at 80° C. for 1 hour and then to 70° C. overnight. The reaction was then cooled to ambient temperature, diluted with ethyl acetate, and washed with water (3×) and brine (1×). The organic layer was dried, filtered, and concentrated under reduced pressure. The residue was purified by column chromatography on silica gel (0-50% ethyl acetate/hexanes) to provide 410 mg (1.3 mmol, 81%) of tert-butyl 4-[(2-chloropyrimidin-4-yl)oxy]piperidine-1-carboxylate as white solid. MS APCI: [M+H]+ m/z 314.2.

1. customto 70° C.
2. customovernight
3. temperatureThe reaction was then cooled to ambient temperature
4. washwashed with water (3×) and brine (1×)
5. customThe organic layer was dried
6. filtrationfiltered
7. concentrationconcentrated under reduced pressure
8. customThe residue was purified by column chromatography on silica gel (0-50% ethyl acetate/hexanes)