反应详情

A solution of 2,5-dibromopyridine in diethyl ether (5 mL/mmol) was cooled to −78° C., and n-butyllithium 2.5M in hexanes (1.05 eq) was added slowly. After 2 hrs in the cold, acetone (1.3 eq) was added and stirring was continued for 1 hour. The resulting mixture was quenched with saturated aqueous ammonium chloride solution, warmed to room temperature, and partitioned between ether and water. The crude product from the organic phase was triturated with 1:1 ether-hexane and filtered to afford the 2-bromo-5-(1-hydroxy-1-methylethyl)pyridine compound as a solid.

1. customThe resulting mixture was quenched with saturated aqueous ammonium chloride solution
2. custompartitioned between ether and water
3. customThe crude product from the organic phase was triturated with 1:1 ether-hexane
4. filtrationfiltered