Chemical process
US4240987A · kind A · utility
19Cited by
1References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 29, 1979 |
| Grant date | Dec 23, 1980 |
| Priority date | — |
| Expiry date | Oct 29, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/12
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
There is disclosed a process for the direct iodination of polyarylidene compounds to provide highly pure para-substituted diiodo derivatives. The polyarylidene 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 polyarylidene 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.