反应详情

To a solution of 5-chloro-2-methylphenyllead triacetate (0.41 g, 0.80 mmol) in chloroform (4 ml) is added bicyclo[3.2.1]octane-2,4-dione (0.10 g, 0.72 mmol) and 4-dimethylaminopyridine (0.46 g, 3.62 mmol), and the reaction mixture is stirred at room temperature for 5 minutes. Next toluene (1 ml) is added, and the mixture is stirred at 80° C. for 1 hour (pre-heated oil bath). The reaction mixture is allowed to cool to room temperature, quenched with 1M hydrochloric acid, and the organic phase separated. The aqueous phase is further washed with dichloromethane (×2), and again the phases are separated. All organics are combined then evaporated under reduced pressure to give a crude oil. Purification by preparative reverse-phase HPLC furnishes 3-(5-chloro-2-methylphenyl)bicyclo[3.2.1]octane-2,4-dione (0.063 g, 33%) as a colourless gum.

1. stirringthe mixture is stirred at 80° C. for 1 hour
2. temperature(pre-heated oil bath)
3. temperatureto cool to room temperature
4. customquenched with 1M hydrochloric acid
5. customthe organic phase separated
6. washThe aqueous phase is further washed with dichloromethane (×2)
7. customagain the phases are separated
8. customAll organics are combined then evaporated under reduced pressure
9. customto give a crude oil
10. customPurification by preparative reverse-phase HPLC