Precursors for fragrant ketones and fragrant aldehydes
申请人:Givaudan SA
公开号:EP1262473A1
公开(公告)日:2002-12-04
The present invention refers to fragrance precursors of formula I
for a fragrant ketone of formula II
and one or more fragrant aldehydes or ketones of formula III and IV,
These fragrance precursors are useful in perfumery, especially in the fine and functional perfumery.
[EN] COMPOUNDS CAPABLE OF RELEASING FRAGRANT COMPOUNDS<br/>[FR] COMPOSÉS CAPABLES DE LIBÉRER DES COMPOSÉS ODORIFÉRANTS
申请人:GIVAUDAN SA
公开号:WO2012085287A1
公开(公告)日:2012-06-28
Provided is class of compounds of formula (I) wherein X, R1, R2 and R3 have the same meaning as given in the specification capable of releasing fragrant compounds in a controlled manner into the surroundings.
The valuable odoriferous material 2-n-pentyl-3-(2-oxopropyl)-1-cyclopentanone is prepared by a process which comprises hydrolysing and decarboxylating a compound of the formula ##STR1## wherein R represents a hydrocarbyl group, with water under pressure and in an initially substantially neutral medium. The use of 2-n-pentyl-3-(2-oxopropyl)-1-cyclopentanone as an odorant is also disclosed.
Provided is class of compounds of formula (I)
wherein X, R
1
, R
2
and R
3
have the same meaning as given in the specification capable of releasing fragrant compounds in a controlled manner into the surroundings.
The present invention relates to a method to evaluate and profile a fragrance composition according to the associated biometric response in humans to the composition. A group of at least 20 test participants is exposed to at least 3 fragrance compositions and at least 4 biometric Autonomatic Nervous System (ANS) parameters are measured. Partition and random/bootstrap forest statistical analysis methods are applied to create a profiling model.