Process for the preparation of dehydroacetic acid

Details Process for the preparation of dehydroacetic acid Process for the preparation of dehydroacetic acid

1983-04-21

1985-01-29

Milestone, Norma S.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D30938

Patent

active

044967470

ABSTRACT:
A process for the preparation of dehydroacetic acid which comprises heating 2,2,6-trimethyl-4H-1,3-dioxin-4-one, preferably at a temperature of about 130.degree. C. to about 160.degree.C., the heating being carried out preferably in the presence of an inert solvent such as xylene and preferably dehydroacetic acid; the solvent being present in an amount of about 0.05 to about 2.0 moles per mole of the compound being heated, the process further comprising recovering dehydroacetic acid so produced.

REFERENCES:
patent: 2229204 (1941-01-01), Boese
patent: 2849456 (1958-08-01), Branch
patent: 2912441 (1959-11-01), Montagna et al.
patent: 3336339 (1967-08-01), England
patent: 3483224 (1969-12-01), Fitzpatrick et al.
patent: 3493586 (1970-02-01), Kuhn et al.
patent: 3592826 (1971-07-01), Marcus et al.
M. F. Carroll et al., Jour. Am. Chem. Soc., (1953), vol. 75, pp. 5400-5402.

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