Firmenich Sa

Wolfgang K Giersch

Gunther Ohloff

Karl-Heinrich Schulte-Elte

Francois Delay

Fritz Gautschi

Bernard L Muller

Alan F Thomas

Anthony F Morris

Andre Boschung

Peter Fankhauser

Pierre-Alain Blanc

Hubert Mimoun

Ferdinand Naf

Ferdinand Naef

Karl H Schulte-Elte

Cyril Mahaim

The present invention refers to a process for the preparation of unsaturated ketones or aldehydes by pyrolysis of a lactone, in the presence of a reducing agent such as molecular hydrogen or a carboxylic acid, and in the presence of a catalyst, optionally supported, comprising at least one metal selected from the group consisting of Y, Ti, Cd, Mn, Zn, Sc and Zr.

Process for the direct conversion of lactones into unsaturated ketones or aldehydes

Aliphatic esters and their utilization as perfuming ingredients

Nitriles and aldehydes derived from 3-isopropenyl-1,2-dimethyl-1-cyclopentanol and their use in perfumery

The compounds according to the general formula

Unsaturated ketones and their use in perfumery

Bicyclic ketones and their use in the field of perfumery

The 2,5,6-trimethyl-2-heptanol described is a compound having an odor of the floral-freesia type, with a slightly fruity character. It is adapted to be used in practically all fields of modem perfumery. Thanks to its typical floral and woody taste, it is also a prized flavoring ingredient.

Use of 2,5,6-trimethyl-2-heptanol in perfumery and as flavoring

The compounds of formula ##STR1## wherein the Z group can be located in positions ortho-, meta- or para-relative to the carboxylic group, symbol R.sup.1 stands for a saturated or unsaturated, linear or branched C.sub.1 to C.sub.4 alkyl radical and

Cyclic diesters and their use as perfuming ingredients

The compounds of the formula ##STR1## wherein R represents a 3,3-dimethyl-1-cyclopentyl or a 3,3-dimethyl-1-1cyclohexyl radical, R.sup.5 represents a saturated, linear or branched, C.sub.1 to C.sub.3 alkyl radical and, either R.sup.1 and R.sup.2 stand each for a hydrogen atom, R.sup.3 and/or R.sup.4 representing a methyl radical, or R.sup.3 and R.sup.4 represent each a hydrogen atom, R.sup.1 and/or R.sup.2 representing then a methyl radical, are novel compounds and useful perfuming ingredients, capable of imparting to the compositions into which they are incorporated odor notes of the musky-ambrette and fruity type. A process for the preparation of compounds (I) is disclosed.

Esters and their use in perfumery

Spiro[5.7]tridec-1-ene-3-one is a useful perfuming ingredient for the preparation of perfuming bases and perfumed articles to which it imparts odor notes of the costus, animal and leather type.

Use of a spiranic compound as a perfuming ingredient

Spiranic lactone of formula ##STR1## possesses useful fragrance properties and it can be used advantageously as fragrance ingredient in various consumable materials. It develops warm, spicy, lactonic and coumarinic odor notes.

Use of a spiranic lactone as fragrance ingredient

Oxygen containing macrocyclic compounds of formula ##STR1## wherein (a) the dotted lines indicate the location of an endocyclic single or double bond in positions 4 and 8 of the ring and of an exocyclic carbon-oxygen single bond in position 1, the wavy lines define a C--C bond of E or Z configuration when the bond in positions 4 and 8 is a double bond, and the symbols Z.sup.1 and Z.sup.2, taken together, define a cyclic acetal or ketal group represented by the formula ##STR2## wherein the symbols R.sup.1 and R.sup.2, identical or different, represent each an alkyl radical, linear or branched, containing from 1 to 6 carbon atoms, or one of said symbols represents a hydrogen atom and the other an alkyl radical defined as above; or wherein

Oxygen containing macrocyclic compounds, a process for their preparation

The bicyclic ester represented by the formula ##STR1## or 2-(2,3,4,5,6,7-hexahydro-1,1,4,4-tetramethyl-2(1H)-indenyl)-ethyl acetate, develops odor characters of the woody, slightly amber and musky type, and can therefore be advantageously used for the preparation of perfuming compositions or perfumes, and for perfuming products such as soaps, cosmetic preparations, detergents, fabric softeners or air deodorizers.

Perfuming ingredient

Bicyclic aliphatic alcohols or formula ##STR1## wherein substituents CH.sub.2 OH and CH.sub.3 are geminally bound to the carbon atom in position 2 or 3 of the hexanic ring and wherein the wavy line stands for a C-H bond of cis or trans configuration. Use of same as perfuming ingredients.

Bicyclic aliphatic alcohols and their utilization as perfuming

Composition consisting of from less than 100% to more than about 80% of trans-1-(2,6,6-trimethylcyclohexyl)-hexan-3-ol and a definite amount, but not more than about 20%, of cis-1-(2,6,6-trimethylcyclohexyl)-hexan-3-ol. Process for preparing same from .beta.-cyclocitral via a three-, optionally, four-step pathway. Utilization of the said composition as effective perfume ingredient.

Growing community of inventors

Bernex, Switzerland

Wolfgang K Giersch