1-Methylpiperazine → 8-(4-Methyl-piperazin-1-yl)-3-(2-methylsulfanyl-pyrimidin-4-yl)-imidazo[1,2-a]pyrazine

Participants

Reaction Steps

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.

Provenance & Evidence