Method of making ketoisophorone via oxidation of isophorone...

Details Method of making ketoisophorone via oxidation of isophorone... Method of making ketoisophorone via oxidation of isophorone...

C - Chemistry, Metallurgy

07

C

C07C 49/603 (2006.01) C07C 45/28 (2006.01)

Patent

CA 2180376

A method of manufaturing 2,6,6-trimethyl-2-cyclohexen-1,4-dione (ketoisophorone) from 3,5,5-trimethy1-2-cyclohexenone (alpha- isophorone). The alpha-isophorone is reacted with hydroperoxide in a solvent, and in the presence of a metal catalyst. The reaction converts the alpha-isophorone directly to ketoisophorone without the intermediate isomerization of alpha-isophorone to beta-isophorone (3,5,5-trimethyl-3-cyclohexenone).

Un procédé permet d'obtenir 2,6,6-triméthyl-2-cyclohexène-1,4-dione (céto-isophorone) à partir de 3,5,5-triméthyl-2-cyclohexénone (alpha-isophorone). On fait réagir cette dernière avec de l'hydroperoxyde dans un solvant et en présence d'un catalyseur métallique. Cette réaction convertit directement l'alpha-isophorone en céto-isophorone sans isomérisation intermédiaire de l'alpha-isophorone en bêta-isophorone (3,5,5-triméthyl-3-cyclohexénone).

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