反应详情

The urea was prepared from 4-nitro 2-hydroxy aniline (308 mg, 2 mmol) and 2,4-dibromo phenyl isocyanate (2 mmol) by general Method B. It was purified by dilution with methylene chloride and precipitation with hexane. Filtering afforded the title compound (0.34 g, 39%). EI-MS m/z 430 (M+H)+

1. customIt was purified by dilution with methylene chloride and precipitation with hexane
2. filtrationFiltering