Importance

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Abstract

This invention relates to campholenic derivatives of general formula (I) Wherein R1, R2, R3, R4 and R5 represent, each independently, a hydrogen atom or a linear or branched C.sub.1-C.sub.5 alkyl or C.sub.2-C.sub.5 alkenyl group, Y represents a CN, a C(O)R.sub.6 or a CR.sub.6(OR.sub..alpha.) (OR.sub..beta.) group, wherein R.sub.6 represents a hydrogen atom or a linear or branched C.sub.1-C.sub.5 alkyl or C.sub.2-C.sub.5 alkenyl group, and R.sub..alpha. and R.sub..beta. represent simultaneously a linear or branched C.sub.1, C.sub.2, C.sub.3, C.sub.4 or C.sub.5 alkyl or C.sub.2, C.sub.3, C.sub.4 or C.sub.5 alkenyl group and can form together a cycle, the 5-membered ring is saturated or has a double bond between C3' and C4' in formula (I), and the side chain, optionally, has a double bond between C1 and C2 and/or between C3 and C4, provided that the derivative is not 3-methyl-6-(2,2,3-trimethyl-cyclopent-3-enyl)-hex-4-enal; and their use as fragrant or flavouring agent.

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First Claim