Process for the preparation of oxophorones
AssigneeFirmenich SA
InventorsJoseph J. Becker, Ulrich P. Hochstrasser, Werner Skorianetz
Life of this patent
Estimating the term…
Abstract
Process for the preparation of a diketone derivative, viz 2,2,6-trimethyl-cyclohex-5-en-1,4-dione, an organoleptically interesting ingredient for the perfumery and the flavour industry, as well as a useful intermediate for the pharmaceutical industry.
Claims4
Process for the preparation of 2,2,6-trimethyl-cyclohex-5-en-1,4-dione, which comprises oxidizing 3,5,5-trimethyl-cyclohex-2-en-1-one, in the liquid phase, by means of oxygen, or an oxygen containing gas mixture in the presence of a metal catalyst selected from a salt or an oxide of vanadium, chromium, manganese, iron, cobalt, nickel or rhodium or an organic derivative of vanadium, iron, cobalt or rhodium at a temperature of from about 80.degree. to 180.degree.C.
Dependencies are inferred from the claim text.