反应详情

温度

0 °C

A 2,4-dichloro-6-(methylsulfonylmethyl)pyrimidine (42, prepared as reported in WO2008/023159, 1.60 g, 6.64 mmoles) was dissolved in dichloromethane and cooled to 0° C. A solution of 8-oxa-3-azabicyclo[3.2.1]octane (2, 0.990 g, 6.64 mmoles) in dichloromethane and triethylamine (1.94 mL, 13.94 mmoles) was slowly added over 15 minutes. The solution was allowed to warm to room temperature over 30 minutes then heated to reflux for 1.5 hours. The reaction mixture was stirred at room temperature for an additional 18 hours, then concentrated and purified by chromatography on silica gel (eluting with 2-3% methanol in dichloromethane) to provide 3-(2-chloro-6-(methylsulfonylmethyl)pyrimidin-4-yl)-8-oxa-3-azabicyclo[3.2.1]octane (43) as a white solid. Yield: 1.72 g (82%). HRMS; [M+H]+ Obs'd=318.0669, [M+H]+ Calc'd=318.0674.

1. temperatureto warm to room temperature over 30 minutes
2. temperaturethen heated
3. temperatureto reflux for 1.5 hours
4. concentrationconcentrated
5. custompurified by chromatography on silica gel (eluting with 2-3% methanol in dichloromethane)