Abstract: The present invention concerns a dynamic mixture obtained by combining, in the presence of water, at least one diamine derivative, comprising at least one heteroaryl moiety, with at least two perfuming aldehydes and/or ketones. The invention's mixture is capable of releasing in a controlled and prolonged manner said perfuming compounds, in particular perfuming ingredients, into the surrounding environment. The invention's dynamic mixture gives rise to a more evenly distributed positive effect for the release of the different carbonyl compounds which are part of the mixture than other examples reported in the prior art.

Abstract: A method to confer, enhance, improve or modify the odor properties of a perfuming composition or of a perfumed article by adding to the composition or article an effective amount of at least one compound of formula I: wherein n represents 0, 1 or 2; m represents 0, 1 or 2; the dotted lines represent only single bonds or one double bond and two single bonds; R1 represents a hydrogen atom or a methyl or ethyl group, and R2 represents an OR3 group, R3 representing a C1-C3 alkyl or alkenyl group; a group of formula CR4?C(R4)2, or a group of formula with R4 representing a hydrogen atom or a methyl or ethyl group. These compounds impart a clean and natural fruity, pineapple odor type to the perfuming compositions or perfumed articles to which they are added.

Abstract: The present invention concerns a process for the preparation of a compound of formula (I) in the form of any one of its stereoisomers or mixtures thereof, and wherein the dotted line may represents an additional bond and Ra represents a hydrogen atom or a Si(Rb)3 or (Rb)2COH group, each Rb representing C1-6 alkyl group or a phenyl group. The invention concerns also the compound (I) as well as its use for the synthesis of ?-santalol or of derivatives thereof.

Abstract: Sandalwood perfuming ingredients that are 2-[perhydro-trialkyl-2-naphthalenylidene]-1-propanol or propanal derivatives of the formula wherein one dotted line represents a carbon-carbon single bond and the other a carbon-carbon single bond or double bond; X represents a CH2OH group or a CHO group; each R1 represents a hydrogen atom or a methyl group; and the R2, taken separately, represent each a hydrogen atom or the two R2 groups, taken together, represent a CH2 group or a carbon-carbon double bond; and said compound is in the form of any one of its stereoisomers or a mixture thereof, along with the use of such compound(s) in perfuming compositions or articles in the perfumery industry.

Abstract: The present invention relates to certain ester and nitrile derivatives of formula (I): wherein one dotted line represents a carbon-carbon single or double bond and the other dotted lines each represent a carbon-carbon single bond; R1 is a hydrogen atom or a methyl group, R2 is a methyl or ethyl group, R3 is a hydrogen atom or a methyl group, R4 is a hydrogen atom or a methyl group or said R4 taken together with the bond between carbon atom 2 and 3 form a cyclopropane; and X represents a CN or a COOR5 group, R5 representing a C1-5 alkyl group; with the compound being in the form of any one of its pure stereoisomers or mixtures thereof. These compounds are useful perfuming ingredients.

Abstract: The present invention relates to the field of perfumery. More particularly, it concerns the use as perfuming ingredients of certain phenol esters of formula wherein R represents a C2-6 branched alkyl group or a C2-6 linear or branched alkenyl group or cyclopropyl containing hydrocarbon group. The present invention concerns also the compositions or articles containing such compounds.

Abstract: The present invention relates to certain ester and nitrile derivatives of formula (I): wherein one dotted line represents a carbon-carbon single or double bond and the other dotted lines each represent a carbon-carbon single bond; R1 is a hydrogen atom or a methyl group, R2 is a methyl or ethyl group, R3 is a hydrogen atom or a methyl group, R4 is a hydrogen atom or a methyl group or said R4 taken together with the bond between carbon atom 2 and 3 form a cyclopropane; and X represents a CN or a COOR5 group, R5 representing a C1-5 alkyl group; with the compound being in the form of any one of its pure stereoisomers or mixtures thereof. These compounds are useful perfuming ingredients.

Abstract: The present invention relates to certain derivatives of 2-ethyl-4-(2?,2?-dimethyl-3?-alkyl-3?-cyclopenten-1?-yl)-4-penten-1-ol. These compounds possess very interesting perfuming ingredients due to their unusual combination of sandalwood and floral notes. The present invention also concerns the use of such compounds in the perfumery industry as well as the compositions or articles containing such compounds.

Abstract: The present invention relates to a spiroheterocycle derivative which is a useful perfuming ingredient. Furthermore, the present invention concerns also the compositions or articles containing this compound.

Abstract: Sandalwood perfuming ingredients that are 2-[perhydro-trialkyl-2-naphthalenylidene]-1-propanol or propanal derivatives of the formula wherein one dotted line represents a carbon-carbon single bond and the other a carbon-carbon single bond or double bond; X represents a CH2OH group or a CHO group; each R1 represents a hydrogen atom or a methyl group; and the R2, taken separately, represent each a hydrogen atom or the two R2 groups, taken together, represent a CH2 group or a carbon-carbon double bond; and said compound is in the form of any one of its stereoisomers or a mixture thereof, along with the use of such compound(s) in perfuming compositions or articles in the perfumery industry.

Abstract: The present invention relates to the field of perfumery and concerns the use as perfuming ingredient of ketones of formula wherein n represents 0, 1 or 2, m represents 0, 1 or 2, the dotted lines represent only single bonds or one double bond and two single bonds, R1 represents a hydrogen atom or a methyl or ethyl group, said R1 group being located at any of the position of the cyclic moiety, R2 represents a C1-C3 O-alkyl or O-alkenyl group or a substituted or unsubstituted ethylene or cyclopropyl group. Said compounds are useful to impart a clean and natural fruity, pineapple odor type. The present invention concerns also the compositions or articles containing said compounds (I) as well as some of said compounds (I).

Abstract: The present invention relates to certain ?-decalone derivatives which can impart useful odor notes of the pheromone or costus type. The present invention concerns the use of the compounds in the perfumery industry to impart such odor notes as well as to the compositions or articles that contain these compounds.

Abstract: The present invention relates to a spiroheterocycle derivative which is a useful perfuming ingredient. Furthermore, the present invention concerns also the compositions or articles containing this compound.

Abstract: The present invention relates to the field of organic synthesis and more particularly to a new process for the preparation of a compound of formula (I), in the form of any one of its isomers or a mixture thereof, wherein, more preferably, G represents a C?O group, R1 represents a butyl group and R2 represents a methyl group. The process of the invention involves an 2-(1-hydroxyalkyl)-cyclopent-2-en-1-one derivative, as starting material, which can be then converted into a compound of formula (I) by a process comprising a thermal rearrangement. The 2-alkylidene-3-oxo-cyclopentylacetate derivative and the 2-(1-hydroxyalkyl)-cyclopent-2-en-1-one derivative are also an object of the invention.

Abstract: The present invention relates to certain ?-decalone derivatives which can impart useful odor notes of the pheromone or costus type. The present invention concerns the use of the compounds in the perfumery industry to impart such odor notes as well as to the compositions or articles that contain these compounds.

Abstract: The present invention relates to a process for the carbon-carbon double bond isomerisation of a 2-alkyl-cyclohex-3-enyl alkyl or alkenyl ketone into a mixture comprising the corresponding 2-alkyl-cyclohex-2-enyl ketones and the corresponding 2-alkylene-cyclohexyl ketones, using as catalyst a ruthenium complex obtainable by the reaction of an appropriate ruthenium organometallic precursor and an acid.

Abstract: The present invention relates to a process for the carbon-carbon double bond isomerisation of a 2-alkyl-cyclohex-3-enyl alkyl or alkenyl ketone into a mixture comprising the corresponding 2-alkyl-cyclohex-2-enyl ketones and the corresponding 2-alkylene-cyclohexyl ketones, using as catalyst a ruthenium complex obtainable by the reaction of an appropriate ruthenium organometallic precursor and an acid.

Abstract: The present invention relates to the field of organic synthesis and more particularly to a new process for the preparation of a compound of formula (I), in the form of any one of its isomers or a mixture thereof, wherein, more preferably, G represents a C?O group, R1 represents a butyl group and R2 represents a methyl group. The process of the invention involves an 2-(1-hydroxyalkyl)-cyclopent-2-en-1-one derivative, as starting material, which can be then converted into a compound of formula (I) by a process comprising a thermal rearrangement. The 2-alkylidene-3-oxo-cyclopentylacetate derivative and the 2-(1-hydroxyalkyl)-cyclopent-2-en-1-one derivative are also an object of the invention.

Abstract: The present invention describes a method for stereospecific isomerisation of prochiral allylamines into enamines and chiral imines, by using catalysts of Rh, Ir and Ru having phosphine chiral ligands immobilised on a solid material. The immobilised ligands are derivatives of phosphines of the type bis(diphenylphosphino)biaryl such as, for example, the phosphine known by the name BINAP. The method is particularly suitable for the production of optically active citronellal which may be obtained in optical purities above 95%.

Abstract: The optically active compounds of formula ##STR1## wherein R.sup.1 represents a hydrogen atom or a methyl radical, or of formula ##STR2## are useful as perfuming ingredients for the preparation of perfuming compositions and perfumed articles to which they impart woody-amber notes.