Chemical process

Details Chemical process Chemical process

C - Chemistry, Metallurgy

07

C

260/652

C07C 25/18 (2006.01) C07C 17/12 (2006.01)

Patent

CA 1143751

- 1 - ABSTRACT OF THE DISCLOSURE There is disclosed a process for the direct iodination of polyarylidene compounds to provide highly pure para-substituted diiodo derivatives. The polyary- lidene compound is reacted with iodine in the presence of an oxidant, unreactive with the aromatic nucleus, in a reaction medium containing a solvent for the poly- arylidene compound, a catalyst and water. The reaction medium is recovered for reuse in subsequent reactions by the removal of spent oxidant which, in the preferred embodiment, is based upon the temperature dependent differences in solubility between the diiodo derivative and the spent oxidant.

360932

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