反应详情

温度

40 °C

Ethyl 2-bromo-4-chloropyridine-3-carboxylate (1 g, 3.78 mmol) was dissolved in anhydrous dioxane (30 mL). A solution of diisopropyl zinc (4.5 mL, 4.54 mmol, 1.0 M in toluene) was added dropwise, followed with (1,1′-bis(diphenylphosphino)ferrocene)dichloropalladium (44 mg, 60 μmol). The mixture was heated at 40° C. overnight, and water followed with 1 N HCl was added. The reaction mixture was extracted 3 times with ethyl acetate, and the combined organic phases were washed with brine and dried over sodium sulfate. After evaporation, the residue was dissolved in DCM and purified on silica gel using 0-15% hexane/ethyl acetate to afford ethyl 4-chloro-2-(propan-2-yl)pyridine-3-carboxylate (428 mg, 50% yield).

1. additionwas added
2. extractionThe reaction mixture was extracted 3 times with ethyl acetate
3. washthe combined organic phases were washed with brine
4. dry with materialdried over sodium sulfate
5. customAfter evaporation
6. dissolutionthe residue was dissolved in DCM
7. custompurified on silica gel using 0-15% hexane/ethyl acetate