反应详情

To a solution of ethyl 5-bromonicotinate (1.02 g, 4.4 mmol) in diethyl ether (15 mL) at −30° C. was added a 3M solution of methyl magnesium bromide in ether (4 mL, 12 mmol). The resulting slurry was refluxed for 2 hours then cooled and quenched with an excess of 0.5M aqueous monobasic sodium phosphate and partitioned between ether and water. The product from the organic phase was chromatographed on silica gel eluting with a 2:1:2 mixture of ether, pentane and ammonia-saturated methylene chloride to afford the 3-bromo-5-(1-hydroxy-1-methylethyl)pyridine compound as a yellow oil.

1. temperatureThe resulting slurry was refluxed for 2 hours
2. temperaturethen cooled
3. customquenched with an excess of 0.5M aqueous monobasic sodium phosphate
4. custompartitioned between ether and water
5. customThe product from the organic phase was chromatographed on silica gel eluting with a 2:1:2 mixture of ether, pentane and ammonia-saturated methylene chloride