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).

  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • Patent number: 10150730
    Abstract: The present invention relates to a process for preparing 1-(2,6,6-trimethylcyclohex-2-en-1-yl)but-2-en-1-one, which comprises a) providing 6,10-dimethylundeca-1,5,9-trien-4-ol, b) oxidizing 6,10-dimethylundeca-1,5,9-trien-4-ol provided in step a) with an oxidizing agent in the presence of at least one organic nitroxyl radical, at least one nitrate compound and an inorganic solid to yield 6,10-dimethylundeca-1,5,9-trien-4-one, c) reacting the 6,10-dimethylundeca-1,5,9-trien-4-one obtained in step b) with an acid to yield 1-(2,6,6-trimethylcyclohex-2-en-1-yl)but-2-en-1-one.
    Type: Grant
    Filed: August 17, 2016
    Date of Patent: December 11, 2018
    Assignee: BASF SE
    Inventors: Stefan Rüdenauer, Thomas Fenlon, Shrirang Hindalekar, Nisha Pansare, Abhijeet Deb Roy, Vijay Narayanan Swaminathan
  • Publication number: 20180346478
    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: Application
    Filed: November 22, 2016
    Publication date: December 6, 2018
    Applicant: BASF SE
    Inventors: Albert WERNER, Miriam BRU ROIG, Joaquim Henrique TELES, Stefan RÜDENAUER, Stephan MAURER, Manuel DANZ
  • Publication number: 20180346397
    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: Application
    Filed: September 20, 2016
    Publication date: December 6, 2018
    Inventors: Miriam BRU ROIG, Stefan RÙDENAUER
  • Patent number: 10106517
    Abstract: The present invention relates to a method for preparing tetrahydropyranyl esters from the corresponding 4-hydroxytetrahydropyran compounds by reaction with a ketene compound.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: October 23, 2018
    Assignee: BASF SE
    Inventors: Stefan Rüdenauer, Timon Stork, Ralf Pelzer, Volker Hickmann, Margarethe Klos
  • Patent number: 10106477
    Abstract: The present invention relates to a process for preparing, 4-bis(ethoxymethyl)cyclohexane, which comprises reacting 1,4-bis(hydroxymethyl)cyclohexane with ethyl chloride in the presence of an inorganic base, a solvent and a phase transfer catalyst to yield a reaction mixture containing 1,4-bis(ethoxymethyl)cyclohexane, where the inorganic base is selected from alkali metal hydroxides and earth alkaline metal hydroxides and where the solvent is selected from water or a mixture of water with at least one organic solvent.
    Type: Grant
    Filed: August 17, 2016
    Date of Patent: October 23, 2018
    Assignee: BASF SE
    Inventors: Thomas Fenlon, Stefan Rüdenauer, Ralf Pelzer, Shrirang Hindalekar, Vijay Narayanan Swaminathan, Nitin Gupte, Sadanand Ardekar
  • Publication number: 20180273458
    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: Application
    Filed: July 8, 2016
    Publication date: September 27, 2018
    Applicant: Ruprecht-Karls-Universitat Heidelberg
    Inventors: JULIA STRAUTMANN, Stefan RÜDENAUER, Christian REIN, Melanie WEINGARTEN, Rocco PACIELLO, Wolfgang SIEGEL, Michael BREUER, Peter HOFMANN, Sebastian SCHMIDT
  • Publication number: 20180244613
    Abstract: The present invention relates to a process for preparing 1-(2,6,6-trimethylcyclohex-2-en-1-yl)but-2-en-1-one, which comprises a) providing 6,10-dimethylundeca-1,5,9-trien-4-ol, b) oxidizing 6,10-dimethylundeca-1,5,9-trien-4-ol provided in step a) with an oxidizing agent in the presence of at least one organic nitroxyl radical, at least one nitrate compound and an inorganic solid to yield 6,10-dimethylundeca-1,5,9-trien-4-one, c) reacting the 6,10-dimethylundeca-1,5,9-trien-4-one obtained in step b) with an acid to yield 1-(2,6,6-trimethylcyclohex-2-en-1-yl)but-2-en-1-one.
    Type: Application
    Filed: August 17, 2016
    Publication date: August 30, 2018
    Inventors: Stefan RÜDENAUER, Thomas FENLON, Shriang HINDALEKAR, Nisha PANSARE, Abhijeet Deb ROY, Vijay Narayanan SWAMINATHAN
  • Publication number: 20180237369
    Abstract: The present invention relates to a process for preparing,4-bis(ethoxymethyl)cyclohexane, which comprises reacting1,4-bis(hydroxymethyl)cyclohexane with ethyl chloride in the presence of an inorganic base, a solvent and a phase transfer catalyst to yield a reaction mixture containing 1,4-bis(ethoxymethyl)cyclohexane, where the inorganic base is selected from alkali metal hydroxides and earth alkaline metal hydroxides and where the solvent is selected from water or a mixture of water with at least one organic solvent.
    Type: Application
    Filed: August 17, 2016
    Publication date: August 23, 2018
    Inventors: Thomas FENLON, Stefan RÜDENAUER, Ralf PELZER, Shrirang HINDALEKAR, Vijay Narayanan SWAMINATHAN, Nitin GUPTE, Sadanand ARDEKAR
  • Patent number: 10053410
    Abstract: The present invention relates to a process for preparing a macrocyclic diketone compound of the formula (I), which comprises the oxidation of a bicycloolefine compound of the formula (II) with an oxidizing agent, formulae (I) (II) where in formulae (I) and (II) A is (CH2)n with n being an integer from 2 to 12, where two hydrogen atoms may be replaced by C1-C4-alkyl, in particular methyl, or two hydrogen atoms, which are bound to adjacent carbon atoms may be replaced by a fused 5- or 6-membered saturated carbocycle; B is (CH2)m with m being 1 or 2, where 1 or 2 hydrogen atoms may be replaced by C1-C4-alkyl, in particular methyl.
    Type: Grant
    Filed: May 19, 2016
    Date of Patent: August 21, 2018
    Assignee: BASF SE
    Inventors: Stefan Rüdenauer, Miriam Bru Roig, Andreas Ernst, Thomas Fenlon
  • Patent number: 10053409
    Abstract: The present invention relates to a process for producing 3-methylcyclopentadecane-1,5-dione of formula (I), which comprises the oxidation of 14-methyl-bicyclo[10.3.0]pentadecen[1 (12)] of formula (II) with an oxidizing agent, where the oxidation is performed by using a mixture of formic acid with H2O2 as sole oxidizing agent in the presence of water and where the amount of H2O2 is at least 1.1 mol H2O2 per mol of the compound of formula (II).
    Type: Grant
    Filed: June 2, 2016
    Date of Patent: August 21, 2018
    Assignee: BASF SE
    Inventors: Miriam Bru Roig, Stefan Rüdenauer
  • Publication number: 20180208533
    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: Application
    Filed: July 15, 2016
    Publication date: July 26, 2018
    Inventors: Stefan RÜDENAUER, Andreas LANVER, Ralf PELZER, Klaus EBEL, Thomas FENLON, Andrei-Nicolae PARVULESCU, Sumana CHATURVEDULA
  • Publication number: 20180208532
    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: Application
    Filed: July 15, 2016
    Publication date: July 26, 2018
    Applicant: BASF SE
    Inventors: Andrei-Nicolae PARVULESCU, Ulrich MÜLLER, Thomas FENLON, Sumana CHATURVEDULA, Stefan RÜDENAUER, Andreas LANVER, Ralf PELZER, Klaus EBEL