反应详情

温度

50 °C

Into a solution of 4-(2,4-dimethylphenoxy)-2,5-dimethyl-3-chloroaniline (1.75 grams, 6.3 mmol) prepared in Part B in 7 milliliters of toluene, which solution was warmed to a temperature of 50° C., was added 1.14 grams (6.2 mmol) of 2,6-difluorobenzoyl isocyanate in 1.5 milliliters of toluene. The reaction mixture was heated to a temperature of 90° C. and maintained at this temperature for 0.5 hours. After cooling to room temperature, the reaction mixture was diluted with 20 milliliters of hexane and then cooled in an ice bath. A precipitate formed which was collected by filtration and washed with a cold solution of 50% hexane in toluene. After vacuum drying, a white solid (1.26 grams) which was identified as 1-[3-chloro-4-(2,4-dimethylphenoxy)-2,5-dimethylphenyl]-3-(2,6-difluorobenzoyl)urea was obtained having a melting point of 183° C.-185° C. Elemental analysis of the white solid indicated the following:

1. temperatureThe reaction mixture was heated to a temperature of 90° C.
2. temperaturemaintained at this temperature for 0.5 hours
3. temperatureAfter cooling to room temperature
4. temperaturecooled in an ice bath
5. customA precipitate formed which
6. filtrationwas collected by filtration
7. washwashed with a cold solution of 50% hexane in toluene
8. customAfter vacuum drying
9. customwas obtained