反应详情

After dissolving 300 mg of methyl 6-bromo-3-methoxypyrazine-2-carboxylate in 10 ml of tetrahydrofuran, 32 mg of [1,3-bis(diphenylphosphino)propane]dichloronickel (II) was added, a solution of 0.73 ml of dimethyl zinc in toluene (2.0 M) was added dropwise under a nitrogen atmosphere and the mixture was stirred at room temperature for 3 hours. Saturated aqueous ammonium chloride solution and aqueous sodium carbonate solution were added to the reaction solution in that order, and extraction was performed with ethyl acetate. The organic layer was washed with water and saturated brine in that order and dried over anhydrous magnesium sulfate, and then the solvent was distilled off under reduced pressure. The residue was purified by silica gel column chromatography (solvent: n-hexane/ethyl acetate) to obtain the title compound (161 mg, 73% yield).

1. additionwas added
2. washThe organic layer was washed with water and saturated brine in that order
3. dry with materialdried over anhydrous magnesium sulfate
4. distillationthe solvent was distilled off under reduced pressure
5. customThe residue was purified by silica gel column chromatography (solvent: n-hexane/ethyl acetate)