Patents by Inventor Valentin Rautenstrauch
Valentin Rautenstrauch has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 8809256Abstract: The invention relates to a method of use of certain derivatives of formula (I) in the form of any one of its stereoisomers or a mixture thereof, and wherein R1 represents a hydrogen atom, a C1-4 alkyl or alkenyl group, or a (CHR)2OH group, each R being a hydrogen atom or a methyl group; R2 represents a hydrogen atom or a methyl, ethyl or n-propyl group; and R3 represents a hydrogen atom or a methyl group, as perfuming ingredients. The present invention concerns also certain compounds and compositions or articles containing such compounds.Type: GrantFiled: April 19, 2011Date of Patent: August 19, 2014Assignee: Firmenish SAInventors: Valentin Rautenstrauch, Piero Fantini
-
Publication number: 20130011353Abstract: The invention relates to a method of use of certain derivatives of formula (I) in the form of any one of its stereoisomers or a mixture thereof, and wherein R1 represents a hydrogen atom, a C1-4 alkyl or alkenyl group, or a (CHR)2OH group, each R being a hydrogen atom or a methyl group; R2 represents a hydrogen atom or a methyl, ethyl or n-propyl group; and R3 represents a hydrogen atom or a methyl group, as perfuming ingredients. The present invention concerns also certain compounds and compositions or articles containing such compounds.Type: ApplicationFiled: April 19, 2011Publication date: January 10, 2013Applicant: FIRMENICH SAInventors: Valentin Rautenstrauch, Piero Fantini
-
Patent number: 7579295Abstract: Catalysts of formula [Ru(L)m(L?)wXY]??(II) wherein X and Y represent simultaneously or independently a hydrogen or halogen atom, a hydroxy group, or an alkoxy, carboxyl or other anionic radical, m is 1 or 2, w is 1 when m is 1 and w is 0 when m is 2, L is a phosphino-amine or phosphino-imine bidentate ligand and L? a diphosphine, are useful for the hydrogenation of substrates having a carbon-hetero atom double bond.Type: GrantFiled: August 8, 2007Date of Patent: August 25, 2009Assignee: Firmenich SAInventors: Valentin Rautenstrauch, René Challand, Eric Brazi, Hubert Mimoun, Raphaël Churlaud, Robert Harold Morris, Kamaluddin Abdur-Rashid
-
Publication number: 20080015376Abstract: Catalysts of formula [Ru(L)m(L?)wXY]??(II) wherein X and Y represent simultaneously or independently a hydrogen or halogen atom, a hydroxy group, or an alkoxy, carboxyl or other anionic radical, m is 1 or 2, w is 1 when m is 1 and w is 0 when m is 2, L is a phosphino-amine or phosphino-imine bidentate ligand and L? a diphosphine, are useful for the hydrogenation of substrates having a carbon-hetero atom double bond.Type: ApplicationFiled: August 8, 2007Publication date: January 17, 2008Applicant: Firmenich SAInventors: Valentin Rautenstrauch, Rene Challand, Eric Brazi, Hubert Mimoun, Raphael Churlaud, Robert Morris, Kamaluddin Abdur-Rashid
-
Patent number: 7317131Abstract: The catalysts of formula (II): [Ru(L)m(L?)wXY], wherein X and Y represent simultaneously or independently a hydrogen or halogen atom, a hydroxy group, or an alkoxy, carboxyl or other anionic radical, m is 1 or 2, w is 1 when m is 1 and w is 0 when m is 2, L is a phosphino-amine or phosphino-imine bidentate ligand and L? a diphosphine, are useful for the hydrogenation of substrates having a carbon-hetero atom double bond.Type: GrantFiled: September 11, 2001Date of Patent: January 8, 2008Assignee: Firmenich SAInventors: Valentin Rautenstrauch, René Challand, Raphaël Churlaud, Robert Harold Morris, Eric Brazi, Hubert Mimoun, Kamaluddin Abdur-Rashid
-
Publication number: 20050245748Abstract: The catalysts of formula (II): [Ru(L)m(L?)wXY], wherein X and Y represent simultaneously or independently a hydrogen or halogen atom, a hydroxy group, or an alkoxy, carboxyl or other anionic radical, m is 1 or 2, w is 1 when m is 1 and w is 0 when m is 2, L is a phosphino-amine or phosphino-imine bidentate ligand and L? a diphosphine, are useful for the hydrogenation of substrates having a carbon-hetero atom double bond.Type: ApplicationFiled: September 11, 2001Publication date: November 3, 2005Inventors: Valentin Rautenstrauch, Rene Challand, Eric Brazi, Hubert Mimoun, Kamaluddin Abdur-Rashid, Robert Morris, Raphaël Churlaud
-
Patent number: 6878852Abstract: A process for the hydrogenation, using molecular hydrogen (H2) of a catalytic system, wherein the catalytic system includes a base and a complex of formula (II): Ru(P2N2)Y2??(II) wherein Y represent simultaneously or independently a hydrogen or halogen atom, a hydroxy group, or an alkoxy, carboxyl or other anionic radical, and P2N2 is a tetradentate diimino-diphosphine ligand.Type: GrantFiled: November 11, 2001Date of Patent: April 12, 2005Assignee: Firmenich SAInventors: Valentin Rautenstrauch, Raphaël Churlaud, Robert Harold Morris, Kamaluddin Abdur-Rashid
-
Publication number: 20040063966Abstract: The catalysts of formula (II): [Ru(L)m(L′)wXY], wherein X and Y represent simultaneously or independently a hydrogen or halogen atom, a hydroxy group, or an alkoxy, carboxyl or other anionic radical, m is 1 or 2, w is 1 when m is 1 and w is 0 when m is 2, L is a phosphino-amine or phosphino-imine bidentate ligand and L′ a diphosphine, are useful for the hydrogenation of substrates having a carbon-hetero atom double bond.Type: ApplicationFiled: September 3, 2003Publication date: April 1, 2004Inventors: Valentin Rautenstrauch, Rene Challand, Eric Brazi, Hubert Mimoun, Kamaluddin Abdur-Rashid
-
Publication number: 20040015017Abstract: A process for the hydrogenation, using molecular hydrogen (H2), of a catalytic system, wherein the catalytic system comprises a base and a complex of formula; (II) wherein Y represents simultaneously or independently a hydrogen or halogen atom, a hydroxy group, or an alkoxy, carboxyl or other anionic radical, and N2P2 is a tetradentate diimine-diphosphino ligand.Type: ApplicationFiled: April 25, 2003Publication date: January 22, 2004Inventors: Valentin Rautenstrauch, Raphael Churlaud, Robert Harold Morris, Kamaluddin Abdur-Rashid
-
Patent number: 6586620Abstract: The present invention discloses a process for the preparation of a compound according to formula wherein R1 is a C3-C7 alkyl group and R2 is a C1 to C4, linear or branched, alkyl radical, more preferably a methyl group, characterized in that the process includes the isomerisation of an epoxide of formula wherein R1 and R2 have the meaning given in formula (I), in the presence of an acidic isomerisation agent, a thermal treatment or a combination thereof. The process according to the invention allows the preparation of the cyclopentenyl compounds of formula (I) on an industrial scale. The compounds are important starting products for the production of appreciated perfuming ingredients in particular methyl dihydrojasmonates.Type: GrantFiled: May 6, 2002Date of Patent: July 1, 2003Assignee: Firmenich SAInventors: Khushrav Crawford, Valentin Rautenstrauch, Arnoldus Uijttewaal
-
Patent number: 6455460Abstract: A catalyst of ruthenium (II) comprising bidentate phosphine ligands is described which is obtained by a process that comprises treating equimolar amounts of an appropriate Ru complex and a bidentate diphosphine ligand with an acid of the formula H-Anion, wherein the anion is a non-coordinating anion, said acid being used in a ratio of 1 molar equivalent per mole of Ru complex and the treatment being carried out in a non-coordinating or weakly coordinating medium, under an oxygen-free atmosphere. Said catalyst is useful for the preparation of the preferred isomer of the Hedione®, having the configuration (+)-(1R)-cis, and of many other substrates comprising highly hindered carbon-carbon double bonds.Type: GrantFiled: October 18, 2000Date of Patent: September 24, 2002Assignee: Firmenich SAInventors: Daniel A. Dobbs, Koenraad P. M. Vanhessche, Valentin Rautenstrauch
-
Patent number: 5874600Abstract: A catalyst of ruthenium (II) which includes bidentate phosphine ligands. The catalyst is obtainable by a process which includes the steps of treating equimolar amounts of an appropriate Ru(II) complex and a bidentate diphosphine ligand with an acid of formula HX, wherein X is a non-coordinating anion. The acid is used in a ratio which does not exceed 2 molar equivalents per mole of Ru(II) complex and the treatment is carried out in a non-coordinating or weakly coordinating solvent and under an inert atmosphere. This catalyst is useful for the preparation of the preferred isomer of HEDIONE, having the (+)-(1R)-cis-configuration.Type: GrantFiled: July 10, 1997Date of Patent: February 23, 1999Assignee: Firmenich SAInventors: Valentin Rautenstrauch, Koenraad P. M. Vanhessche, Jean-Pierre Genet, Jean-Yves Lenoir
-
Patent number: 5728866Abstract: A method for preparing 3-oxo-2-pentyl-1-cyclopentaneacetic acid or methyl 3-oxo-2-pentyl-1-cyclopentaneacetate, essentially in the form of the (+)-(1R)-cis isomer thereof. The method includes the steps of(a) catalytically hydrogenating a compound of the formula (I), ##STR1## wherein M is a hydrogen atom, an alkali metal or alkaline earth metal atom, or a group NR.sub.4, where R is a hydrogen or a lower alkyl radical, in a suitable solvent and in the presence of a catalyst consisting of an Ru(II) complex comprising chiral ligands that contain a 2,2'-bis(diphenylphosphino)-1,1'-dinaphthyl (BINAP) radical or a 1,2-bis(2,5-dialkylphospholano)benzyl (DuPHOS) radical, wherein the alkyl is a C.sub.2 or C.sub.3 radical, to give a compound of formula (II), ##STR2## wherein M has the meaning given above, essentially in the form of the (+)-(1R)-cis isomer thereof;(b) if required, acidifying, in a per se known manner, the compound of formula (II), wherein M is an alkali metal or alkaline earth metal atom, or a group N.Type: GrantFiled: February 7, 1996Date of Patent: March 17, 1998Assignee: Firmenich SAInventors: Valentin Rautenstrauch, Jean-Jacques Riedhauser
-
Patent number: 4499297Abstract: Cyclopentenones of formula ##STR1## wherein each of symbols R.sup.1 and R.sup.2, when taken separately, represents an alkyl radical of C.sub.1 to C.sub.6, or a hydrogen atom, or, when taken together, they represent a polymethylene, or one of them designates a hydrogen atom and the other an alkyl radical of C.sub.1 to C.sub.6, are prepared starting from compounds having formula ##STR2## wherein R stands for a C.sub.1 to C.sub.6 alkyl radical or a phenyl group, via a catalytic reaction promoted by a metallo-organic compound of formulaMeX.sub.2 (R.sup.3 CN).sub.2 (III)wherein Me represents palladium or platinum, R.sup.3 represents a C.sub.1 to C.sub.3 alkyl radical or a phenyl group and X defines a halogen atom.Type: GrantFiled: November 16, 1983Date of Patent: February 12, 1985Assignee: Firmenich, SAInventor: Valentin Rautenstrauch
-
Patent number: 4088664Abstract: Process for the preparation of .gamma.,.delta.-unsaturated carboxylate esters which comprises reacting an .alpha.,.beta.-unsaturated alcohol with a trialkyl orthopropionate in the presence of an organic acid having pk.sub.a of about 7 to 9.Among the thus obtained .gamma.,.delta.-unsaturated carboxylate esters, 2,5,9-trimethyl-deca-3,4,8-triene-carboxylates and 2-methyl-3-[2-methyl-5-isopropenyl-cyclopent-1-en-1-yl]-propionates are particularly useful as intermediates for the preparation of perfuming ingredients.Type: GrantFiled: December 22, 1976Date of Patent: May 9, 1978Assignee: Firmenich S.A.Inventor: Valentin Rautenstrauch
-
Patent number: 4048120Abstract: Cyclobutane derivatives useful as odor-modifying ingredients for manufacturing perfumes and perfumed products, and as flavor-modifying ingredients for the manufacture of artificial flavors or for flavoring foodstuffs, feedstuffs, beverages, pharmaceutical preparations or tobacco products.Type: GrantFiled: May 26, 1976Date of Patent: September 13, 1977Assignee: Firmenich S.A.Inventor: Valentin Rautenstrauch
-
Patent number: 3946078Abstract: Process for the preparation of unsaturated cycloaliphatic ketones useful as perfuming and odour-modifying agents in the manufacture of perfumes and perfumed products, and as flavouring and taste-modifying agents in the aromatization of foodstuffs in general and imitation flavours for foodstuffs, beverages, animal feeds, pharmaceutical preparations and tobacco products.Compositions of matter relating to some of said unsaturated cycloaliphatic ketones which are new, and perfume- and flavouring compositions containing same.Type: GrantFiled: April 29, 1974Date of Patent: March 23, 1976Assignee: Firmenich SAInventors: Valentin Rautenstrauch, Ferdinand Naf