反应详情

A mixture of 14 g (0.074 mol) of 4-chloro-5-nitro-1,2-benzenediamine and of 13.44 g (0.226 mol) of urea is heated at 180° C. for 4 hours. The reaction mixture is cooled and evaporated to dryness. The residue is taken up in methanol and evaporated again. The residue is triturated in ether and a solid is obtained which is filtered. The product is used as is in the subsequent stages.

1. temperatureThe reaction mixture is cooled
2. customevaporated to dryness
3. customevaporated again
4. customThe residue is triturated in ether
5. customa solid is obtained which
6. filtrationis filtered