反应详情

To a solution of 8-chloro-3-(2-methylsulfanyl-pyrimidin-4-yl)-imidazo[1,2-a]pyrazine (from Example 44 supra) (1.36 g, 4.91 mmol) in iPrOH (100 mL) was added 1-methylpiperazine (0.64 g, 6.38 mmol) followed by diisopropylethylamine (0.82 g, 6.38 mmol). The reaction mixture was stirred at reflux for 15 hours and the solvent was removed under reduced pressure. The residue was extracted with dichloromethane (150 mL) and washed with water (3×25 mL), dried over anhydrous sodium sulfate, filtered, and concentrated to afford 8-(4-methyl-piperazin-1-yl)-3-(2-methylsulfanyl-pyrimidin-4-yl)-imidazo[1,2-a]pyrazine. (Yield 1.4 g, 83.7%). LC-MS: [M+H]+ 342.

1. temperatureat reflux for 15 hours
2. customthe solvent was removed under reduced pressure
3. extractionThe residue was extracted with dichloromethane (150 mL)
4. washwashed with water (3×25 mL)
5. dry with materialdried over anhydrous sodium sulfate
6. filtrationfiltered
7. concentrationconcentrated