Patents by Inventor Stefan Rüdenauer

Stefan Rüdenauer 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).

  • AROMA CHEMICAL COMPOSITIONS CONTAINING 3,5-DIETHYL-2-PROPYL-TETRAHYDROPYRAN AND/OR UNSATURATED DERIVATIVES THEREOF
    Publication number: 20210403826
    Abstract: The present invention relates to aroma chemical compositions containing 3,5-diethyl-2-propyl-tetrahydropyran, a 3,5-diethyl-2-propyl-dihydropyran or a 3,5-diethyl-2-propyl-pyran, a mixture of such compounds, a stereoisomer of one of these compounds, or a mixture of stereoisomers of one or more of these compounds. The invention further relates to a method for preparing such compounds, stereoisomers or mixtures thereof, to the composition obtainable by this method, to the use of such compounds as an aroma chemical or for modifying the scent character of a fragranced composition; and to a method for preparing a fragranced composition or for modifying the scent character of a fragranced composition using said compounds. Moreover, the invention relates to 3,5-diethyl-2-propyl-tetrahydropyran, to its stereoisomers and to mixtures of these stereoisomers.
    Type: Application
    Filed: October 5, 2018
    Publication date: December 30, 2021
    Inventors: Nicolas MARION, Rolf PINKOS, Stefan RUEDENAUER, Florian GARLICHS, Ralf PELZER, Roman DOSTALEK, Joachim PFEFFINGER, Anja VINCKIER, Stephanie RENZ, Christoph STOCK, Regina-Margareta BERG, Miriam BRU ROIG, Margarethe KLOS
  • ENZYMATIC CYCLIZATION OF HOMOFARNESYLIC ACID
    Publication number: 20210381013
    Abstract: The present invention relates to processes for the preparation of sclareolide and related compounds by the biocatalytic cyclization of polyunsaturated carboxylic acid compounds, in particular of homofarnesylic acid and related compounds; and to a process for the preparation of ambroxide via the biocatalytic cyclization of homofarnesylic acid to sclareolide.
    Type: Application
    Filed: December 23, 2020
    Publication date: December 9, 2021
    Inventors: Michael BREUER, Wolfgang SIEGEL, Stefan RÜDENAUER, Ralf PELZER
  • Preparation of acetate compounds via a ketene compound
    Patent number: 11091424
    Abstract: The present invention relates to a method for preparing acetate compounds using ketene.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: August 17, 2021
    Assignee: BASF SE
    Inventors: Volker Hickmann, Sumana Roy, Dominik Herbrecht, Michael Acker, Wolfgang Krause, Ralf Boehling, Timon Stork, Stefan Ruedenauer, Ralf Pelzer
  • Tetrahydropyranyl lower alkyl esters and the production of same using a ketene compound
    Patent number: 10981885
    Abstract: The present invention relates to tetrahydropyranyl lower akyl esters and specifically to tetrahydropyranyl acetates, a method for preparation thereof using ketene and use thereof as fragrances and aroma substances.
    Type: Grant
    Filed: May 30, 2017
    Date of Patent: April 20, 2021
    Inventors: Volker Hickmann, Timon Stork, Stefan Ruedenauer, Ralf Pelzer
  • Enzymatic cyclization of homofarnesylic acid
    Patent number: 10954538
    Abstract: The present invention relates to processes for the preparation of sclareolide and related compounds by the biocatalytic cyclization of polyunsaturated carboxylic acid compounds, in particular of homofarnesylic acid and related compounds; and to a process for the preparation of ambroxide via the biocatalytic cyclization of homofarnesylic acid to sclareolide.
    Type: Grant
    Filed: February 20, 2017
    Date of Patent: March 23, 2021
    Inventors: Michael Breuer, Wolfgang Siegel, Stefan Ruedenauer, Ralf Pelzer
  • 2,3,7-trimethyloct-6-enyl acetate and 3,7-dimethyl-2-methylene-oct-6-enyl acetate and derivatives thereof and their use as aroma chemicals
    Patent number: 10913704
    Abstract: The present invention relates to 2,3,7-Trimethyloct-6-enyl acetate and 3,7-dimethyl-2-methylene-oct-6-enyl acetate and derivatives thereof and their use as aroma chemicals.
    Type: Grant
    Filed: May 4, 2018
    Date of Patent: February 9, 2021
    Inventors: Volker Hickmann, Stefan Ruedenauer, Ralf Pelzer, Vijay Narayanan Swaminathan, Shrirang Hindalekar, Nitin Gupte, Sadanand Ardekar, Mileen Kadam
  • TETRAHYDROPYRANYL LOWER ALKYL ESTERS AND THE PRODUCTION OF SAME USING A KETENE COMPOUND
    Publication number: 20200325112
    Abstract: The present invention relates to tetrahydropyranyl lower akyl esters and specifically to tetrahydropyranyl acetates, a method for preparation thereof using ketene and use thereof as fragrances and aroma substances.
    Type: Application
    Filed: May 30, 2017
    Publication date: October 15, 2020
    Inventors: VOLKER HICKMANN, Timon STORK, Stefan RUEDENAUER, Ralf PELZER
  • Preparation of 14-methyl-16-oxabicyclo[10.3.1]pentadecenes from 3-methyl-1,5-cyclopentadecanedione
    Patent number: 10800724
    Abstract: The present invention relates to a method for preparing 14-methyl-16-oxabicyclo-[10.3.1]pentadecenesin a two-step synthesis from 3-methyl-1,5-cyclopentadecane-dione as starting material.
    Type: Grant
    Filed: July 14, 2017
    Date of Patent: October 13, 2020
    Assignee: BASF SE
    Inventors: Miriam Bru Roig, Stefan Ruedenauer
  • PREPARATION OF ACETATE COMPOUNDS VIA A KETENE COMPOUND
    Publication number: 20200308094
    Abstract: The present invention relates to a method for preparing acetate compounds using ketene.
    Type: Application
    Filed: December 17, 2018
    Publication date: October 1, 2020
    Inventors: Volker HICKMANN, Sumana ROY, Dominik HERBRECHT, Michael ACKER, Wolfgang KRAUSE, Ralf BOEHLING, Timon STORK, Stefan RUEDENAUER, Ralf PELZER
  • 2,3,7-TRIMETHYLOCT-6-ENYL ACETATE AND 3,7-DIMETHYL-2-METHYLENE-OCT-6-ENYL ACETATE AND DERIVATIVES THEREOF AND THEIR USE AS AROMA CHEMICALS
    Publication number: 20200190014
    Abstract: The present invention relates to 2,3,7-Trimethyloct-6-enyl acetate and 3,7-dimethyl-2-methylene-oct-6-enyl acetate and derivatives thereof and their use as aroma chemicals.
    Type: Application
    Filed: May 4, 2018
    Publication date: June 18, 2020
    Inventors: Volker HICKMANN, Stefan RUEDENAUER, Ralf PELZER, Vijay Narayanan SWAMINATHAN, Shrirang HINDALEKAR, Nitin GUPTE, Sadanand ARDEKAR, Mileen KADAM
  • PREPARATION OF 14-METHYL-16-OXABICYCLO[10.3.1]PENTADECENES FROM 3-METHYL-1,5-CYCLOPENTADECANEDIONE
    Publication number: 20190300467
    Abstract: The present invention relates to a method for preparing 14-methyl-16-oxabicyclo-[10.3.1]pentadecenes in a two-step synthesis from 3-methyl-1,5-cyclopentadecane-dione as starting material.
    Type: Application
    Filed: July 14, 2017
    Publication date: October 3, 2019
    Inventors: Miriam BRU ROIG, Stefan RUEDENAUER
  • Method for the hydroformylation of 2-substituted butadienes and the production of secondary products thereof, especially ambrox
    Patent number: 10315975
    Abstract: The present invention relates to a method for the regioselective hydroformylation of polyunsaturated acyclic hydrocarbons, which are 1, 3 butadienes, which, in the 2 position, bear a saturated or monounsaturated or polyunsaturated acyclic hydrocarbon radical. The present invention also relates to the production of secondary products of these hydroformylation products, especially of ambrox.
    Type: Grant
    Filed: July 8, 2016
    Date of Patent: June 11, 2019
    Assignees: BASF SE, Ruprecht-Karls-Universität Heidelberg
    Inventors: Julia Strautmann, Stefan Rüdenauer, Christian Rein, Melanie Weingarten, Rocco Paciello, Wolfgang Siegel, Michael Breuer, Peter Hofmann, Sebastian Schmidt
  • 1-HYDROXYMETHYL-1,2,2,6-TETRAMETHYL-CYCLOHEXANE AND DERIVATIVES THEREOF AND THEIR USE AS AROMA CHEMICALS
    Publication number: 20190169108
    Abstract: The invention relates to compounds of formula (A) as defined herein, and esters of the compound of formula (A), and ketones of the compound of formula (A). The invention further relates to a method for preparing compounds of formula (A) and esters of the compound of formula (A), and ketones of the compound of formula (A). The invention further relates to the use of at least one compound selected from compounds of formula (A) and the esters of a compound of formula (A) and the ketones of a compound of formula (A) as aroma chemical.
    Type: Application
    Filed: August 3, 2017
    Publication date: June 6, 2019
    Inventors: VOLKER HICKMANN, Stefan RUEDENAUER, Ralf PELZER, Vijay Narayanan SWAMINATHAN, Shrirang HINDALEKAR, Nitin GUPTE, Sadanand ARDEKAR, Mileen KADAM
  • Process for preparing an arylpropene
    Patent number: 10308580
    Abstract: A process for preparing an arylpropene from a diarylpropane by gas phase thermolysis in the presence of solid porous catalyst comprising silica having large pore volume and low acidity.
    Type: Grant
    Filed: July 15, 2016
    Date of Patent: June 4, 2019
    Assignee: BASF SE
    Inventors: Stefan Rüdenauer, Andreas Lanver, Ralf Pelzer, Klaus Ebel, Thomas Fenlon, Andrei-Nicolae Parvulescu, Sumana Chaturvedula
  • ENZYMATIC CYCLIZATION OF HOMOFARNESYLIC ACID
    Publication number: 20190144899
    Abstract: The present invention relates to processes for the preparation of sclareolide and related compounds by the biocatalytic cyclization of polyunsaturated carboxylic acid compounds, in particular of homofarnesylic acid and related compounds; and to a process for the preparation of ambroxide via the biocatalytic cyclization of homofarnesylic acid to sclareolide.
    Type: Application
    Filed: February 20, 2017
    Publication date: May 16, 2019
    Inventors: Michael BREUER, Wolfgang SIEGEL, Stefan RUEDENAUER, Ralf PELZER
  • Method for the preparation of compounds having a 16-oxabicyclo[10.3.1]pentadecene scaffold and the subsequent products thereof
    Patent number: 10259822
    Abstract: The present invention relates to a method for preparing compounds having a 16-oxabicyclo[10.3.1]pentadecene skeleton, specifically 14-methyl-16-oxabicyclo[10.3.1]pentadecenes, and conversion products thereof.
    Type: Grant
    Filed: November 22, 2016
    Date of Patent: April 16, 2019
    Assignee: BASF SE
    Inventors: Albert Werner, Miriam Bru Roig, Joaquim Henrique Teles, Stefan Rüdenauer, Stephan Maurer, Manuel Danz
  • Production of 2-substituted 4-hydroxy-4-methyl-tetrahydropyrans from starting materials containing 2-alkyl-4,4-dimethyl-1,3-dioxanes
    Patent number: 10233169
    Abstract: The present invention relates to a method for preparing 2-substituted 4-hydroxy-4-methyltetrahydropyrans from starting materials comprising at least one 2-alkyl-4,4-dimethyl-1,3-dioxane.
    Type: Grant
    Filed: April 8, 2015
    Date of Patent: March 19, 2019
    Assignee: BASF SE
    Inventors: Timon Stork, Stefan Rüdenauer
  • Process for preparing an arylpropene
    Patent number: 10202323
    Abstract: A process for preparing an arylpropene from a diarylpropane by gas phase thermolysis in the presence of boron containing zeolitic material comprising a membered ring (MR) pore system greater than 10 MR.
    Type: Grant
    Filed: July 15, 2016
    Date of Patent: February 12, 2019
    Assignee: BASF SE
    Inventors: Andrei-Nicolae Parvulescu, Ulrich Müller, Thomas Fenlon, Sumana Chaturvedula, Stefan Rüdenauer, Andreas Lanver, Ralf Pelzer, Klaus Ebel
  • Process for preparing 3-methylcyclopentadecane-1,5-diol
    Patent number: 10196332
    Abstract: The present invention relates to a process for preparing 3-methylcyclopentadecane-1,5-diol (I) by hydrogenolysis of 14-methyl-16,17,18-trioxatricyclo[10.3.2.1]octadecane (II). The invention further relates to a process for preparing 3-methylcyclopentadecane-1,5-diol is a macrocyclic diol that can serve as precursor for a macrocyclic odorant, such as muscone and muscenone.
    Type: Grant
    Filed: September 20, 2016
    Date of Patent: February 5, 2019
    Assignee: BASF SE
    Inventors: Miriam Bru Roig, Stefan Rüdenauer
  • Use of isomerically pure or highly isomer-enriched cis- or trans-(2-isobutyl-4-methyl-tetrahydropyran-4-yl)acetate
    Patent number: 10160931
    Abstract: The present invention relates to the use of isomerically pure or highly isomerically enriched cis- or trans-(2-isobutyl-4-methyltetrahydropyran-4-yl) acetate for use as aroma chemicals. The invention further relates to a process for the preparation of isomerically pure or highly isomerically enriched cis- or trans-(2-isobutyl-4-methyltetrahydropyran-4-yl) acetate and the products obtainable by this process. The invention further relates to a fragrance or aroma substance composition which comprises isomerically pure or highly isomerically enriched cis- or trans-(2-isobutyl-4-methyltetra-hydropyran-4-yl) acetate, a method for imparting, and/or boosting an odor or taste of a product, and also perfumed or aromatized products which comprise isomerically pure or highly isomerically enriched cis- or trans-(2-isobutyl-4-methyltetrahydropyran-4-yl) acetate.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: December 25, 2018
    Assignee: BASF SE
    Inventors: Timon Stork, Stefan Rüdenauer, Margarethe Klos, Ralf Pelzer, Wolfgang Krause