Method of making ketoisophorone via oxidation of isophorone with

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

1994-11-14

1996-08-13

Geist, Gary

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

Organic compounds

Oxygen containing

568343, C07C 4528, C07C 4534

Patent

active

055457614

ABSTRACT:
A method of manufacturing 2,6,6-trimethyl-2-cyclohexen-1,4-dione (ketoisophorone) from 3,5,5-trimethyl-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).

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patent: 4898984 (1990-02-01), Bellut
Hosokawa et al., Chemistry Letters, pp. 1081-1082 (1983).
CA112: 76460b (1990).
Holland et al., Can. J. Chem., vol. 60, pp. 1919-1923 (1982).

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