Firmenich Sa

Ferdinand Naf

Gunther Ohloff

Rene Decorzant

Albert Eschenmoser

Wolfgang K Giersch

Karl H Schulte-Elte

Anthony F Morris

Alan F Thomas

Valentin Rautenstrauch

Regula Naf

5,6-Epoxy-3,3,6-trimethyl-hept-1-en-4-one, a novel aliphatic epoxy-ketone, has been found to possess useful odor and flavor properties. It can be advantageously used as perfume and flavor-modifying ingredient. Perfume and flavor-modifying composition containing same and process for its preparation.

Aliphatic epoxy-ketone

New alicyclic unsaturated compounds useful as perfume ingredients and perfume compositions containing same. The new compounds have formula ##STR1## possessing a methyl group attached to the carbon atom at position 3 or 4 of the ring and one double bond in one of the positions of the carbonyl side chain as indicated by the dotted line. Process for their preparation from new hydroxy compounds of formula ##STR2##

Alicyclic unsaturated compounds, their preparation and use of same as

Kentones of the formula ##STR1## wherein each of the symbols R.sup.1, R.sup.2, and R.sup.3 identical or different, represent a hydrogen atom or a lower alkyl radical containing 1 to 3 carbon atoms are disclosed useful as perfuming agents and in the preparation of perfume products.

Bicyclic compounds and utilization thereof as perfuming agents

Polyunsaturated aliphatic esters of new chemical structure find utility as flavor modifying agents. Flavoring compositions containing same and process for their preparation.

Polyunsaturated aliphatic esters as flavoring ingredients

Bicyclic aldehyde derivatives of formula ##STR1## containing a single or a double bond in the position indicated by the dotted lines and wherein symbol R.sup.1 represents a hydrogen atom or a methyl radical and R.sup.2 defines a linear or branched alkyl radical containing 1 to 6 carbon atoms. Compounds (I) find specific utility as perfuming and flavoring agents. Process for the preparation of said compounds (I) starting from cyclopentadiene or a methyl substituted cyclopentadiene and an alkyl 4-oxo-butenoate.

Bicyclic aldehyde derivatives, their use as perfuming and flavoring

A novel poly-unsaturated aliphatic aldehyde, viz. 5,9-dimethyl-deca-4,9-dien-1-al, is found to be useful as odor-modifying ingredient. The new aldehyde is particularly useful in the preparation of perfumes and perfumed products.

5,9-Dimethyl-deca-4,9-dien-1-al perfume compositions

Bicyclic aldehyde perfuming and flavoring ingredients

cis-Oct-6-en-1-al is a novel unsaturated aldehyde which possesses useful perfuming and flavoring properties. Use of said aldehyde as perfume and flavor ingredient.

Perfumed articles containing cis-oct-6-en-1-al

Process for preparing unsaturated spiranic derivatives of formula ##STR1## wherein index n represents integer 1 or 2 and wherein symbol R defines a lower alkyl radical, starting from the corresponding cycloalkanone via an addition thereto of a dihalo-alkene of formula ##STR2## wherein symbol R possesses the above-indicated meaning and X represents a halogen atom.

Process for preparing unsaturated spiranic derivatives

CIS-Oct-6-en-1-al is a novel unsaturated aldehyde which possesses useful perfuming and flavoring properties. Use of said aldehyde as perfume and flavor ingredient.

CIS-Oct-6-en-1-al perfumes

Process for the preparation of .alpha.-substituted cyclic ketones which comprises reacting a magnesium enolate with an aldehyde. The products obtained in accordance with the process of the invention are useful intermediates for the preparation of perfume and flavor ingredients, as well as for the synthesis of certain carotenoids.

Process for the preparation of ketone derivatives

Process for the preparation of poly-unsaturated hydrocarbons, in particular undeca-1,3,5-triene, which comprises reacting a quaternary phosphonium salt with hexanal. The product obtained in accordance with the process of the invention is a useful perfuming ingredient.

Process for the preparation of poly-unsaturated hydrocarbons

Process for the preparation of tricyclic sesquiterpenes which comprises reacting a cyclohexadienic carbinol with a strongly basic agent. The products obtained in accordance with the process of the invention are useful ingredients in the perfumery. Some of the said products are new.

Process for the preparation of sesquiterpenic derivatives

Process for the preparation of .gamma.,.delta.-unsaturated carbonyl derivatives. Among the compounds prepared by the process of the present invention some are new and many possess interesting organoleptic properties.

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Geneva, Switzerland

Ferdinand Naf