Introduction of a carbonyl group into a cyclohexene ring

Details Introduction of a carbonyl group into a cyclohexene ring Introduction of a carbonyl group into a cyclohexene ring

1978-01-10

1980-06-24

Niebling, John F.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260413, 560126, 560259, 568378, 568367, 568363, 568356, 568347, 568348, C09F 508, C11C 300, C07C 4500, C07C 4900

Patent

active

042094500

ABSTRACT:
A process for introducing an allyl-positioned carbonyl group into a 2,6,6-trimethylcyclohexene ring which carries a polyenyl radical in the 1-position, by oxidizing the ring with a halogen(V)-oxyacid or a salt of such an acid, and the new oxo compounds obtainable by the said process, which may be used as dyes for foodstuffs or cosmetics. The oxidation is carried out in the presence of a catalyst and of an inert diluent or solvent, in an acid medium. Suitable catalysts are bromine and iodine and the oxides of elements of groups Va, VIa, VIIa and VIII of the periodic table.

REFERENCES:
patent: 3033897 (1962-05-01), Robeson
patent: 3154586 (1964-10-01), Bander
patent: 3646149 (1972-02-01), Morel
The Merck Index, Eighth Edition, P 1061.

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