反应详情

温度

5 °C

3-Isopropyl-4-methoxyphenol (197.2 g, 1.19 moles) was dissolved in dimethylformamide (4 L). The mixture was stirred while the reaction vessel was cooled in an icewater bath. Sodium hydroxide (1.278 L of 1.0M aqueous solution, 1.278 moles) was added while maintaining the temperature of the reaction mixture below 35° C. 1,3-Dibromo-2-iodo-5-nitrobenzene (400.0 g, 0.983 moles) dissolved in dimethylformamide (portion of 4 L) was added to the reaction mixture over approximately 45 min. The reaction mixture was stirred at 20° to 25° C. for 24 h. Deionized water (2 L) was added over 2 h and the reaction mixture was cooled to 5° C. The resulting crystals of 4-(2,6-dibromo-4-nitrophenoxy)-2-isopropylanisole (405.4 g, 92.6%) were recovered by filtration and dried for 48 h by evaporation under air flow at room temperature.

1. temperaturewas cooled in an icewater bath
2. temperaturewhile maintaining the temperature of the reaction mixture below 35° C
3. additionwas added to the reaction mixture over approximately 45 min
4. stirringThe reaction mixture was stirred at 20° to 25° C. for 24 h
5. filtrationThe resulting crystals of 4-(2,6-dibromo-4-nitrophenoxy)-2-isopropylanisole (405.4 g, 92.6%) were recovered by filtration
6. customdried for 48 h by evaporation under air flow at room temperature