Firmenich Sa

Firmenichi Sa

Lionel Saudan

Patrick Wyss

Philippe Dupau

Jean-Jacques Riedhauser

Christophe Saudan

Julie Quintaine

Francesco Santoro

Jézabel Praz

Christian Vial

Sina Dorothea Escher

Yvan Niclass

Eric Walther

Michel Alfred Joseph Saudan, Legal Representative

Sylvia Joyeuse Adélaide Ada Saudan, Legal Representative

Describes herein are methods of using ruthenium complexes in base-free hydrogenation processes for the reduction of imines into the corresponding amines.

Hydrogenation of imines with RU complexes

Described herein are catalytic hydrogenation and the use of ruthenium complexes having a bidentate diphosphine ligand or two monodentate phosphine ligands, two carboxylate ligands, and optionally a diamine ligand in hydrogenation processes for the reduction of imines into the corresponding amines.

Hydrogenation of imines with Ru complexes

Described herein is a process including isomerizing the &#x3b2; position of a &#x3b2;-trisubstituted C-Ccarbonyl compound.

Isomerisation reaction

A method to confer, enhance, improve or modify the flavor properties of a flavoring composition or flavored article by adding to the composition or article the compound 3-mercaptoheptyl acetate or an optically active enantiomer thereof in an amount effective to provide a flavor base having top notes of the citrus-grapefruit, teas and/or peach type and/or red fruit. The compound is typically added to provide an amount of from 0.0001 to 500 ppm in the flavoring composition or flavored article. Also, the resultant flavored composition or flavored article.

Thiols as flavoring ingredient

Composition having a muguet odor

The present invention relates to the field of catalytic hydrogenation and, more particularly, to the use of Fe complexes with tridentate ligands, having one amino or imino coordinating group and two phosphino coordinating groups, in hydrogenation processes for the reduction of ketones or aldehydes, into the corresponding alcohol or diol, respectively.

Hydrogenation of aldehyde or ketone compounds with Fe/tridentate ligands complexes

The present invention relates to the field of catalytic hydrogenation and, more particularly, to the use of Fe complexes with tridentate ligands, having one amino or imino coordinating group and two phosphino coordinating groups, in hydrogenation processes for the reduction of ketones, aldehydes, esters or lactones into the corresponding alcohol or diol, respectively. 

Hydrogenation of esters with Fe/tridentate ligands complexes

The present invention concerns the use as perfuming ingredient of a composition of matter comprising at least 94% w/w of 4,6-dimethyl-3-octen-5-ol, and at most 1% w/w of 2-methylpent-2-en-1-ol and 3-ethyl-4-methylhexan-2-one.

Osmanthus odorant

The present invention relates to the field of catalytic hydrogenation and, more particularly, to a process for the reduction by hydrogenation, using molecular H, of a C-Cconjugated dienal into the corresponding deconjugated enal, characterized in that said process is carried out in the presence of a catalytic system comprising at least a base and at least one complex in the form of a rhodium complex comprising a C-Cbidentate diphosphine ligand (L2) coordinating the rhodium.

Hydrogenation of dienals with rhodium complexes under carbon monoxide free atmosphere

The present invention relates to the field of catalytic hydrogenation and, more particularly, to the use of Ru complexes with bidentate ligands, having one amino or imino coordinating group and one phosphino coordinating group, in hydrogenation processes for the reduction of esters or lactones into the corresponding alcohol or diol respectively.

Hydrogenation of esters with Ru/bidentate ligands complexes

The present invention relates to the field of catalytic hydrogenation and, more particularly, to the use of specific ruthenium catalysts, or pre-catalysts, in hydrogenation processes for the reduction of ketones and/or aldehydes into the corresponding alcohol respectively. Said catalysts are ruthenium complexes comprising a tetradentate ligand (L4) coordinating the ruthenium with: &#x2014;two nitrogen atoms, each in the form of a primary or secondary amine (i.e. a NHor NH group) or N-alkyl imine functional groups (i.e. a C&#x2550;N group), and &#x2014;two sulfur atoms, each in the form of thioether functional groups.

Hydrogenation of esters or carbonyl groups with tetradentate amino/imino-thioether based ruthenium complexes

The present invention relates to processes for the reduction by hydrogenation, using molecular H2, of a substrate containing one or two esters, or lactones, functional groups into the corresponding alcohol, or diol, with the process being carried out in the presence of a base and at least one catalyst or pre-catalyst in the form of a ruthenium complex, wherein the ruthenium is coordinated by a diphosphine bidentate ligand (PP ligand) and a diamino bidentate ligand (NN ligand) that includes at least one substituted &#x3b1;-carbon and one primary amine as one of the coordinating atoms.

The present invention relates to the field of catalytic hydrogenation and, more particularly, to the use of Ru complexes with tetradentate ligands having at least one amino or imino coordinating group and at least one phosphino coordinating group in hydrogenation processes for the reduction of esters or lactones into the corresponding alcohol or diol respectively.

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Geneva, Switzerland

Lionel Saudan