.beta.-.gamma.-Unsaturated ketones and isoprenoid 2,6 diones, a

Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing

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568376, 568380, 568347, 568335, 568659, 568348, 568660, 568661, 568391, 568662, 568663, 568392, 568626, 568669, 568393, 568673, 568579, 568394, 568674, 568675, 568821, 568313, 568315, 568822, 568316, 568390, 568838, 568839, 568841, 568843, 568875, 568849, 568715, 568686, 568683, 568684, 568685, 568687, 252522R, 426656, 568329, 568330, 568331, 568325, 568336, 568375, 568379, 568381, 568415, 568417, C07C 4921, C07C 49217, C07C 49203

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043851851

ABSTRACT:
Compounds of the general formula I: ##STR1## wherein R.sub.1 and R.sub.2 are equal or different alkyl-, alkoxyalkyl-, or aryl groups, or together form a ring; R.sub.3 is an allyl or benzyl radical; and R.sub.4 and R.sub.5 represent hydrogen, alkyl, alkoxyalkyl, alkenyl or further compounds of the formula II: ##STR2## wherein R.sub.1, R.sub.2, R.sub.4 and R.sub.5 have the meaning indicated above and R.sub.6 stands for hydrogen or methyl or to compounds which are modified by the addition of hydrogen to at least one olefinic or carbonylic double bond of compounds of the general formula I or II. The invention also relates to a process for preparing the new compounds. The compounds of the general formula II are obtained by thermal treatment of a selection of compounds of formula I, for which R.sub.3 stands for the allyl or methallyl radical. The compounds according to the invention are used as fragrant and flavoring substances.

REFERENCES:
patent: 3076847 (1963-02-01), Prelog
patent: 3551463 (1970-12-01), Cywinski
patent: 3814767 (1974-06-01), Ward
patent: 3910897 (1975-10-01), Chodneker et al.
patent: 4010207 (0000-01-01), Braunsten et al.
patent: 4216172 (1980-08-01), Heine et al.
Conia et al., Bull. Soc. Chim. Fran., pp. 273-277 (1966).
Kiese et al., Yugaku, vol. 26, p. 474 (1977).

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