反应详情

温度

120 °C

With the exclusion of moisture, 5.4 g of 2,6-difluorobenzoylisocyanate are added with stirring to 9.1 g of 3,5-dichloro-4-(1,1,2,2-tetrafluoroethoxy)phenylisocyanate. The temperature is maintained at 120° C. for 14 hours, with stirring being continued until the reaction mixture commences to congeal. When the resultant crystalline slurry has cooled to room temperature, it is triturated with hexane and subsequently filtered with suction. The residue is recrystallised from toluene, affording the title compound of the formula ##STR9## as a white powder with a melting point of 170°-172° C. (compound 1.2.1).

1. temperatureWhen the resultant crystalline slurry has cooled to room temperature
2. customit is triturated with hexane
3. filtrationsubsequently filtered with suction
4. customThe residue is recrystallised from toluene