反应详情

To a solution of dimethyl 2-amino-3,5-dichloroterephthalate (200 g, 0.72 mol) in THF (1 L) at room temperature was slowly added isoamylnitrite (240 mL). The mixture was heated under reflux for 3 hours, cooled to room temperature and concentrated under reduced pressure. The residue was purified by column chromatography on silica gel, eluting with petroleum-diethyl:ether (50:1) to give dimethyl 2,6-dichloroterephthalate (187 g, yield: 98%) as a light yellow solid.

1. customat room temperature
2. temperatureThe mixture was heated
3. temperatureunder reflux for 3 hours
4. concentrationconcentrated under reduced pressure
5. customThe residue was purified by column chromatography on silica gel
6. washeluting with petroleum-diethyl:ether (50:1)