Abstract: The present invention relates to a cyclohexanone derivative of formula in the form of any one of its isomers or mixture thereof. The invention concerns also the preparation and the use of this derivative. The compounds of the invention are useful starting materials for the preparation of various optically active compounds.

Abstract: The present invention relates to the field of perfumery. More particularly, it concerns compounds comprising at least one ?-carbonate or ?-thio carbonyl moiety capable of liberating a perfuming molecule such as, for example, an ?,?-unsaturated ketone, aldehyde or carboxylic ester. The present invention concerns also the use of said compounds in perfiunery as well as the perfuming compositions or perfumed articles comprising the invention's compounds.

Abstract: The present invention relates to the field of perfumery. More particularly, it concerns compounds comprising at least one &bgr;-oxy or &bgr;-thio carbonyl moiety capable of liberating a perfuming molecule such as, for example, an &agr;,&bgr;-unsaturated ketone, aldehyde or carboxylic ester. The present invention concerns also the use of the compounds in perfumery as well as the perfuming compositions or perfumed articles comprising the invention's compounds.

Abstract: The invention describes novel malonates and a process for using said malonates for the preparation of chiral epoxides of formula having a cyclanic (1R) configuration, the group in position 2 having a transconfiguration and the epoxy group having a cis-configuration with respect to the substituent in position 1 and wherein R is an alkyl group from C1 to C4, linear or branched, and R1 is an alkyl or an alkenyl group from C2 to C8, linear or branched. The above process comprises the rearrangement of malonate (VII) to malonate (VI) and the decarboxylation reaction of into an ester of formula followed by the stereoselective epoxidation of the thus-obtained compound.

Abstract: The compounds of formula ##STR1## having a double bond in one of the positions indicated by the dotted lines, are useful as perfuming ingredients for the preparation of perfuming compositions and perfumed articles, to which they impart a refreshing and natural chamomile-like character.

Abstract: A process for the preparation of novel compounds with a tetraline-type structure, which are useful as perfuming ingredients, is described.

Abstract: Compound of formula ##STR1## wherein a) indexes m and n are identical and stand each for an integer number equal to zero, symbols R.sup.1 and R.sup.2 are identical and represent each a hydrogen atom, or are different and represent each a hydrogen atom or a methyl radical, symbols R.sup.5 and R.sup.8 stand each for a methyl radical, symbols R.sup.6 and R.sup.7 can be identical or different and designate each a hydrogen atom or a methyl radical and, either symbol R.sup.4 represents a methyl radical and symbol R.sup.3 stands for a hydrogen atom or a methyl radical, or symbols R.sup.3 and R.sup.4 represent each a methylene radical belonging to a ring such as indicated by the dotted line, with the proviso that the following combinations are excluded:1. R.sup.1 =R.sup.2 =R.sup.3 =R.sup.6 =R.sup.7 =H, or2. R.sup.1 =R.sup.2 =R.sup.3 =H and R.sup.6 or R.sup.7 =CH.sub.3, or3. R.sup.2 =CH.sub.3 and R.sup.3 =R.sup.6 =R.sup.7 =H, or4. R.sup.2 =CH.sub.3 and R.sup.3 =H and R.sup.6 or R.sup.7 =CH.sub.3, or5. R.sup.1 =R.sup.

Abstract: Compound of formula ##STR1## wherein a) indexes m and n are identical and stand each for an integer number equal to zero, symbols R.sup.1 and R.sup.2 are identical and represent each a hydrogen atom, or are different and represent each a hydrogen atom or a methyl radical, symbols R.sup.5 and R.sup.8 stand each for a methyl radical, symbols R.sup.6 and R.sup.7 can be identical or different and designate each a hydrogen atom or a methyl radical and, either symbol R.sup.4 represents a methyl radical and symbol R.sup.3 stands for a hydrogen atom or a methyl radical, or symbols R.sup.3 and R.sup.4 represent each a methylene radical belonging to a ring such as indicated by the dotted line, with the proviso that the following combinations are excluded:1. R.sup.1 =R.sup.2 =R.sup.3 =R.sup.6 =R.sup.7 =H, or2. R.sup.1 =R.sup.2 =R.sup.3 =H and R.sup.6 or R.sup.7 =CH.sub.3, or3. R.sup.2 =CH.sub.3 and R.sup.3 =R.sup.6 =R.sup.7 =H, or4. R.sup.2 =CH.sub.3 and R.sup.3 =H and R.sup.6 or R.sup.7 =CH.sub.3, or5. R.sup.1 =R.sup.

Abstract: Compound of formula ##STR1## wherein a) indexes m and n are identical and stand each for an integer number equal to zero, symbols R.sup.1 and R.sup.2 are identical and represent each a hydrogen atom, or are different and represent each a hydrogen atom or a methyl radical, symbols R.sup.5 and R.sup.8 stand each for a methyl radical, symbols R.sup.6 and R.sup.7 can be identical or different and designate each a hydrogen atom or a methyl radical and, either symbol R.sup.4 represents a methyl radical and symbol R.sup.3 stands for a hydrogen atom or a methyl radical, or symbols R.sup.3 and R.sup.4 represent each a methylene radical belonging to a ring such as indicated by the dotted line, with the proviso that the following combinations are excluded:1. R.sup.1 =R.sup.2 =R.sup.3 =R.sup.6 =R.sup.7 =H, or2. R.sup.1 =R.sup.2 =R.sup.3 =H and R.sup.6 or R.sup.7 =CH.sub.3, or3. R.sup.2 =CH.sub.3 and R.sup.3 =R.sup.6 =R.sup.7 =H, or4. R.sup.2 =CH.sub.3 and R.sup.3 =H and R.sup.6 or R.sup.7 =CH.sub.3, or5. R.sup.1 =R.sup.

Abstract: A process for the preparation of undeca-1,3,5-triene, a prized perfuming ingredient, in two, respectively three, steps starting from sorbic acid, which makes it possible to obtain said compound in its undeca-1,3E,5Z preferred isomeric form, is disclosed.

Abstract: The decalin ketones of formula ##STR1## having a single or double bond in one of the positions indicated by the dotted lines, or two double bonds in positions 2 and 5 or 3 and 5 such as indicated by the dotted lines, and wherein symbols R.sup.1, R.sup.2 and R.sup.3 represent a hydrogen atom or a methyl radical, are useful as perfuming ingredients for the preparation of perfuming compositions and perfumed articles, to which they impart woody-amber odor notes.A process for the preparation of these ketones is also disclosed.

Abstract: Optically active isomers of alpha-damascone of formula ##STR1## wherein the wavy line designates a C--C bound of cis or trans configuration and its 3-buten-1-one derivative are new compounds having utility in the perfume and flavor industry. They can be prepared starting from an enolate of formula ##STR2## where the wavy line has the meaning given above and Me designates an alkali metal, preferably lithium or magnesium, by treating said enolate with a bifunctional nitrogen derivative of formula ##STR3## where the asterisk identifies a center of chirality;index n stands for zero or 1;each of symbols R.sup.0 and R.sup.1 defines a linear or branched alkyl or aralkyl radical, or one of them represents a hydrogen atom and the other an alkyl radical as defined above;each of symbols R.sup.2 and R.sup.

Abstract: The compounds of formula ##STR1## wherein the symbol R represents a linear or branched, saturated or unsaturated alkyl radical containing from 1 to 3 carbon atoms, are useful perfuming ingredients. They develop floral, rosy, damascone type odor notes and can therefore be used to confer, enhance, improve or modify the fragrance properties of perfuming compositions and perfumed articles.Processes for the preparation of the compounds of formula (I) are also disclosed.

Abstract: Optically active isomers of alpha-damascone of formula ##STR1## wherein the wavy line designates a C--C bond of cis or trans configuration and its 3-buten-1-one derivative are new compounds having utility in the perfume and flavor industry. They can be prepared starting from an enolate of formula ##STR2## where the wavy line has the meaning given above and Me designates an alkali metal, preferably lithium or magnesium, by treating said enolate with a bifunctional nitrogen derivative of formula ##STR3## where the asterisk identifies a center of chirality;index n stands for zero or 1;each of symbols R.sup.0 and R.sup.1 defines a linear or branched alkyl or aralkyl radical, or one of them represents a hydrogen atom and the other an alkyl radical as defined above;each of symbols R.sup.2 and R.sup.

Abstract: Process for the preparation of cycloaliphatic ketones of formula ##STR1## wherein index m designates integer 0, 1 or 2, n stands for 0 or 1 and the dotted lines represent an optional supplemental bond, which process consists in the deprotonation of an ester of formula ##STR2## having either an isolated double bond in position 1 or 2 (exocyclic), or two conjugated double bonds in position 1 and 3 or 2 (exocyclic) and 3 as indicated by the dotted lines, and wherein symbol R' represents a linear or branched alkyl radical, preferably a C.sub.1 -C.sub.6 alkyl radical, or a substituted or unsubstituted phenyl, and Y designates an oxygen or a sulphur atom, the deprotonation being followed by the addition of an organo-metallic compound of formula ##STR3## wherein m and n have the meaning defined above and Z represents a MgX radical or an alkali metal, preferably lithium, X defining a halogen and the dotted lines an optional supplemental bond, and finally a hydrolysis.

Abstract: Process for the preparation of cycloaliphatic aldehydes of formula ##STR1## having either an isolated double bond in position 1 or 2 (endocyclic or exocyclic), or two conjugated double bonds in position 1 and 3 or 2(exocyclic) and 3 of the ring as indicated by the dotted lines, which process consists in subjecting to a deprotonation an ester of formula ##STR2## wherein the dotted lines have the above given meaning and Y designates an oxygen atom or a sulphur atom and R' stands for a linear or branched alkyl radical or a substituted or unsubstituted phenyl group, followed by H.sup..crclbar. addition and hydrolysis.