Question

How to prepare 1,3,5 tribromobenzene from phenol?

Answer 1

First react phenol with ammonia in presence of zinc chloride to obtain aniline.


Then react aniline with bromine water to form 1,3,5-tribromoaniline
Then react 1,3,5-tribromoaniline with sodium nitrite and hydrochloric acid at 273 K to form 1,3,5 tribromobenzenediazonium chloride.


Then react the diazonium salt with ethanol/phosphorous acid and water in presence of copper to form 1,3,5 tribromonbenzene.


Deta