反应详情

温度

85 °C

To a solution of 5-isopropoxy-2-methyl-isophthalic acid dimethyl ester (Cpd B, 14.5 g, 54.5 mmol) in CCl4 (250 mL) was added NBS (11.2 g, 60.0 mmol). After stirring the mixture at 85° C. for 5 minutes, AIBN (2.69 g, 16.4 mmol) was added. The resulting reaction mixture was stirred at 85° C. for 1 hour. The reaction mixture was chilled in an ice bath and the precipitates were filtered and discarded. The resulting filtrate was concentrated under vacuum and purified by column chromatography (0-40%, EtOAc/heptanes) to give 2-bromomethyl-5-isopropoxy-isophthalic acid dimethyl ester (Cpd C, 17.5 g, 93% yield) as a clear oil which solidified upon standing.

1. customThe resulting reaction mixture
2. stirringwas stirred at 85° C. for 1 hour
3. temperatureThe reaction mixture was chilled in an ice bath
4. filtrationthe precipitates were filtered
5. concentrationThe resulting filtrate was concentrated under vacuum
6. custompurified by column chromatography (0-40%, EtOAc/heptanes)