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In tetrahydrofuran at 50℃; for 12h; Inert atmosphere;
18 Preparation of N-(2-hydroxy-4-nitrophenyl)-N'-(2-bromophenyl)urea
Example 18 Preparation of N-(2-hydroxy-4-nitrophenyl)-N'-(2-bromophenyl)urea N-(2-Hydroxy-4-nitrophenyl)-N'-(2-bromophenyl)urea was prepared from 2-hydroxy 4-nitro aniline (500 mg, 3.24 mmol) and 2-bromophenyl isocyanate (3.24 mmol) according to the procedure in General Method B. The product was purified by dilution with methylene chloride and precipitation with hexanes. Filtering afforded the title compound(530 mg, 47%). EI-MS m/z 350(M-H)-
18 Preparation of N-(2-hydroxy-4-nitrophenyl)-N'-(2-bromophenylourea
Example 18 Preparation of N-(2-hydroxy-4-nitrophenyl)-N'-(2-bromophenylourea N-(2-Hydroxy-4-nitrophenyl)-N'-(2-bromophenyl)urea was prepared from 2-hydroxy 4-nitro aniline (500 mg, 3.24 mmol) and 2-bromophenyl isocyanate (3.24 mmol) according to the procedure in General Method B. The product was purified by dilution with methylene chloride and precipitation with hexanes. Filtering afforded the title compound (530 mg, 47%). EI-MS m/z 350 (M-H)-