Method for making keto acids and dione cyclics obtained therefro

Details Method for making keto acids and dione cyclics obtained therefro Method for making keto acids and dione cyclics obtained therefro

1981-12-04

1983-05-31

Reamer, James H.

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

Organic compounds

Oxygen containing

562527, C07C 4566

Patent

active

043862225

ABSTRACT:
A method is provided for oxidatively cleaving .alpha.,.beta.-unsaturated cyclic ketones, such as isophorone, with an oxidizing agent, for example, ozone, and thereafter recovering the resulting keto acid. In instances where ozone is used, an aqueous hydroperoxide and phase transfer catalyst can be used to recover the keto acid. Dione cyclics, for example, dimedone, can be obtained by direct dehydration of the keto acid.

REFERENCES:
patent: 2938918 (1980-05-01), Lavigne
patent: 3419605 (1968-12-01), Mead
patent: 3468944 (1969-09-01), Chafety et al.
patent: 3590080 (1971-06-01), Beesley et al.
Blaha et al., Coll. Czech. Chem. Comm., vol. 30, pp. 1214-1219 (1965).
Henshall et al., J.A.C.S., vol. 77, pp. 6656-6658 (1955).

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