Process for the preparation of unsaturated ketones

Details Process for the preparation of unsaturated ketones Process for the preparation of unsaturated ketones

1972-06-23

1976-09-28

Rizzo, Nicholas S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260586C, 260586R, 260590E, 260591, 260598, 260599, 260601R, C07C 4920

Patent

active

039831779

ABSTRACT:
Ketones, which are intermediates in the synthesis of vitamin A or perfumes, and have the general formula: ##EQU1## wherein R.sub.1 is hydrogen or C.sub.1.sub.-10 hydrocarbon, R.sub.2 and R.sub.3 are hydrogen or C.sub.1.sub.-4 alkyl, R.sub.4 and R.sub.5 are hydrogen or together form a --CH.sub.2 --CH.sub.2 --C(CH.sub.3).sub.2 -- group, R.sub.6 and R.sub.7 are hydrogen or C.sub.1.sub.-10 hydrocarbon, or together with the carbon atom to which they are joined form a hydrocarbon ring of up to 10 carbons, or ##EQU2## forms a hydrocarbon ring of up to 10 carbons joined through R.sub.6 and R.sub.8 or R.sub.7 and R.sub.8, R.sub.8 is hydrogen or C.sub.1.sub.-10 hydrocarbon and n is 0-6, are prepared by reacting an unsaturated halide of formula ##EQU3## wherein X is halogen, with an enol ester of formula ##EQU4## wherein R.sub.9 is C.sub.1.sub.-20 hydrocarbon, in the presence of a metal catalyst.

REFERENCES:
savcy et al., "Heliutica Chemica Acta," vol. 50, pp. 2091-2095, (1967).

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