A kind of preparation method of the chloro- 5- iodo-benzoic acid of 2-

The invention discloses a kind of preparation methods of the chloro- 5- iodo-benzoic acid of 2-.The preparation method obtains the chloro- 5- iodo-benzoic acid of 2- using cheap 0-chloro-benzoic acid as starting material, through nitrification, reduction, diazotising iodo, and this method shortens reaction step, improves yield, is suitable for industrialized production.