反应详情

To a mixture of 4-bromo-2-methylpyridine (1 g, 5.8 mmol) in 15 mL of anhydrous THF was added LDA (9.2 mL, 2M) dropwise at −70, stirred for 30 min dimethyl carbonate (630 mg, 7.0 mmol) was added dropwise to the above solution. After stirring for another 1 h, LC-MS found the reaction finished. It was quenched by Sat. NH4Cl solution and extracted with EtOAc. The organic layer was separated and evaporated under reduced pressure. The crude product was purified by a standard method to give desired product. LC-MS: m/z (M+H) 231.1.

1. additionwas added dropwise to the above solution
2. customIt was quenched by Sat. NH4Cl solution
3. extractionextracted with EtOAc
4. customThe organic layer was separated
5. customevaporated under reduced pressure
6. customThe crude product was purified by a standard method