Preparation of cyclohexane-1,3-dione and of alkyl-substituted de

Details Preparation of cyclohexane-1,3-dione and of alkyl-substituted de Preparation of cyclohexane-1,3-dione and of alkyl-substituted de

1974-03-11

1976-01-13

Morgenstern, Norman

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260586R, 260617R, 260621R, 260621H, 260624R, 260625, 260631R, 260638R, C07C 4500

Patent

active

039325113

ABSTRACT:
Process for the preparation of cyclohexane-1,3-diones of the formula ##SPC1##
Wherein R.sub.1 -R.sub.8, which are the same or different, are each hydrogen or an alkyl group containing up to 6 carbon atoms and the total number of carbon atoms of R.sub.1 -R.sub.8 is not more than 12 carbon atoms, comprising contacting in the gaseous state a delta-keto ester of the formula ##EQU1## wherein R.sub.1 -R.sub.8 are as defined above and R.sub.9 is an alkyl, cycloalkyl, or monocyclic or bicyclic arylalkyl or aryl group containing up to 12 carbon atoms, with a thermally stable solid material having an internal surface area of from about 100 tot 1500 m.sup.2 /gm. at a temperature of from 100 .degree.C to 500 .degree.C.

REFERENCES:
patent: 3595930 (1971-07-01), Hofmann et al.
Vorlander et al., "Justus Liebigs Annalen", 294:270-1.
Bornstein et al. "Chem. Abstracts", 48:9933e (1954).
Kost et al. "Zhur. Absch. Khim", 32:3983-6 (1962).
Mannich et al. "Ber", Vol. 71, pp. 2090-2091 (1938).

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