Chemical process

Details Chemical process Chemical process

1979-10-29

1980-12-23

Davis, Curtis R.

Organic compounds -- part of the class 532-570 series

Organic compounds

Halogen containing

C07C 2526

Patent

active

042409870

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.

REFERENCES:
patent: 4007221 (1977-02-01), Urbach
Baird et al. ACS Div. of Petrol. Chem., 15,3, B 73-81 (1970).
Novikov, Obshcher Kim, 29, 58-59 (1959) [C.A., 53, 21797g].
Pearson et al., Synthesis, Sep. 1976, pp. 621-623.
Chem. Abs. 76, 126650z (1972).
Wirth et al., Ann., 634, pp. 84-104 (1960).
Kern et al. Mekromolekulare Chemie, 29, 164, (1959).

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