Kao Corporation

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Cognis Deutschland Gmbh

Smithkline Beecham Corporation

Cognis Deutschland Gmbh & Co. Kg

Cognis IP Management Gmbh

Technische Universitát Dresden

Thomas Markert

Volker Porrmann

Theo Ten Pierik

Ralph Nemitz

Werner Faber

Georg Knuebel

Ulf-Armin Schaper

Andreas Bomhard

Klaus Bruns

Theo Stalberg

Frank Rittler

Marc Speitkamp

Michael J Virnig

Alfred Westfechtel

Josef Penninger

Louis Danoux

Lothar Friesenhagen

Philippe Moussou

Stephan Heck

Horst-Juergen Krause

Thorsten Löhl

Norbert Klein

Gerrit Pelzer

Hans-Josef Altenbach

Dirk Merkel

Andreas Rathjens

Markus Schneider

Ute Lemke

Elke Veit

Armin Mosandl

Steffi Bilke

Volker Falk

Victor Rogachev

Peter Metz

Unsaturated ketones of general formula (I) where the groups R1, R2, R3, R4 and R5 independently=H or 1-6 C alkyl groups, which can be saturated or unsaturated, straight-chained, branched or cyclic are characterised by an interesting and original odour characteristic with good emanation and are suitable for use as perfumes, for example in cosmetic preparations, technical products or alcoholic perfumery.

Use of unsaturated ketones as a perfume

The invention relates to a method for determining the enantiomer ratio of trimethylcyclopentene derivatives of structure (I), wherein Z is an alkyl radical having 1-10 C atoms, can be saturated or olefinically unsaturated, straight-chained or branched and which is substituted by an OH or CHO group, by means of capillary gas chromatography, wherein a stationary phase is applied containing a compound selected from the group of Heptakis-(2,3-di-O-methyl-6-O-tert.-butyldimethylsily)-&#x3b2;-Cyclodextrin and Heptakis-(2,3-di-O-acetyl-6-O-tert.-butyldimethylsilyl)-&#x3b2;-Cyclodextrin and at least one polysiloxane, wherein the mixing ratio of Cyclodextrin derivatives and polysiloxanes is adjusted to a value ranging from 10:90 to 50:50.

Method for determining the enantiomer ratio trimethylcyclopentene derivatives

The invention relates to the ether lactone of formula (I) which is characterized by interesting and original odor characteristics, which diffuses extremely well and is suitable for use as a fragrance, for example in cosmetic preparations, technical products or in alcoholic perfumery.

Ether lactone

The invention relates to hexenal derivatives of general structure (I), in which one of the bonds represented by dashes is a C&#x2014;C single bond and the other is a C&#x2550;C double bond, with the proviso that the C&#x2550;C double bond can have a Z or E configuration, provided that it is in the C&#xbe; position. Said derivatives are characterised by an interesting and original perfume that pervades a wide area and are suitable for use as perfumes, for example in cosmetic preparations, technical products or the alcohol-based perfume industry.

Use of hexenal derivatives as perfumes

Alkyl-substituted butenols having the formula (I):R&#x2014;CH&#x2014;CH&#x2550;CR&#x2014;CHOH &#x2003;&#x2003;(I)wherein Ris a saturated or olefinically unsaturated alkyl or cycloalkyl group having from 4 to 16 carbon atoms and wherein Ris optionally substituted by an alkyl, cycloalkyl, aryl or alkaryl having up to 12 carbon atoms; Ris hydrogen or an alkyl group having from 1 to about 6 carbon atoms are produced by a process which comprises: (1) reacting an aldehyde of the formula (II):R&#x2014;CH&#x2014;CHO &#x2003;&#x2003;(II)wherein Rhas the same meaning as in formula (I), with the corresponding lower aldehyde to form an unsaturated aldehyde in an inert organic solvent; (2) continuously contacting an optionally calcined copper/zinc catalyst with the unsaturated aldehyde under isothermal conditions at temperatures of from about 45 to about 60&#xb0; C. and under a hydrogen pressure of from 1 to about 300 bar.

Method for producing alkyl-substituted butenols

Compounds of the formula (I): wherein X is a &#x2014;(C&#x2550;CH)&#x2014; group or a &#x2014;CH(CH)&#x2014; group, with the proviso that when X is a &#x2014;(C&#x2550;CH)&#x2014; group, Ris a Calkyl group or a Calkenyl group and when X is a &#x2014;CH(CH)&#x2014; group, Ris hydrogen, a saturated or unsaturated, linear or a branched Calkyl group, a Cacyl group, a Ccycloalkyl group or an aryl group are useful as perfumes.

Dimethylbenzene derivatives

The invention relates to compounds of the general formula (1), wherein R represents a group CH&#x2550;N&#x2014;OH or a group CN. The inventive compounds are characterized by interesting and original odor characteristics which diffuse extremely well and are suitable for use as fragrances, for example in cosmetic preparations, technical products or in alcoholic perfumery.

2,3, 5, 5-tetramethylhexanal derivatives

Compounds of the formula (I):wherein the bond between the &#x3b1;- and &#x3b2;-positions to the aldehyde group represents a C&#x2014;C single bond or a cis- or trans-configured C&#x2550;C double bond are useful as perfumes and perfume ingredients.

3,3-Dimethylcyclohexane derivatives

A Compound corresponding to formula (I):wherein X is a group selected from the group consisting of &#x2014;CHO, &#x2014;CN, &#x2014;CH&#x2550;NOH, and &#x2014;CHOH, and wherein the C&#x2550;C double bond assumes a Z or E configuration.

Trimethyldecenyl compounds

Compounds of the general formula (I) are described:wherein each of R, R, R, R, Rand Rindependently represents a substituent selected from the group consisting of hydrogen, methyl, ethyl, n-propyl, and isopropyl; an wherein x represents either 0 or 1. The compounds are useful as fragrances and as added components in fragrance blends. Methods of improving the harmony, emanation, naturalness an staying power of other fragrance ingredients by the addition of such compounds are also described.

Cyclic ketals, fragrance compositions containing the same and methods of using the same

Carbonyl compounds derived from the reaction of alkyl cyclopentenols and vinyl ethers are described. The carbonyl compounds described have excellent fragrance properties, and their use as fragrances and/or fragrance-enhancing compounds is also described. Processes for the preparation of the carbonyl compounds are described as well.

Carbonyl compounds, methods of making the same, and their use as fragrances and fragrance-enhancing additives

The use of aldehydes as odorous materials, which can be produced through partial or total hydroformylation of cyclooctadienes, except cyclooctane aldehydes, is described. The fragrance enhancing capacity of the compounds is described in methods for their use both as perfumes and perfume enhancers or boosters.

Methods of providing a fragrance to a composition and methods of enhancing fragrances using cyclooctadiene hydroformylation products

The use of monocyclic aldehydes as odorous materials, which can be produced through partial or total hydroformylation of (di)methyl-substituted cyclooct(adi)enes, is described. The fragrance enhancing capacity of the compounds is described in methods for their use both as perfumes and perfume enhancers or boosters.

Methods of providing a fragrance to a composition and methods of enhancing fragrances using (di)methyl-substituted cycloot(adi)ene hydroformylation products

The use of tricyclic aldehydes as odorous materials, which can be produced through partial or total hydroformylation of tricyclo&lsqb;5.2.1.0 &rsqb;-dec(adi)enes, except saturated monoaldehydes, is described. The fragrance enhancing capacity of the compounds is described in methods for their use both as perfumes and perfume enhancers or boosters.

Utilization of tricyclic aldehydes as odoriferous agents

The use of bicyclic aldehydes as odorous materials, which can be produced through partial or total hydroformylation of bicyclo&lsqb;3.3.0&rsqb;-oct(adi)enes, is described. The fragrance enhancing capacity of the compounds is described in methods for their use both as perfumes and perfume enhancers or boosters.

Methods of providing a fragrance to a composition and methods of enhancing fragrances using bicyclo&lsqb;3.3.0&rsqb;-oct(adi)ene hydroformylation products

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Monheim, Germany

Thomas Markert