Patents by Inventor Klaus Forstinger

Klaus Forstinger 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: 9527789
    Abstract: The present invention relates to a method for the preparation of phenols, in which an aryldiazonium salt, which is prepared by the diazotisation of a corresponding aromatic, primary amine, is decomposed by heating in a mixture containing hot water, a mineral acid and an organic solvent, wherein the organic solvent contains a ketone of formula (I) R1C(O)R2 in which R1 and R2 independently stand for (C1-C5)-alkyl and R1 and R2 together have at least four carbon atoms, wherein the aromatic primary amine is aniline or a substituted aniline, which contains at least one further substituent which is selected from: alkyl, alkenyl, alkynyl, halogen, haloalkyl, cycloalkyl, heteroaryl, carboxyl, cyan, alkoxyl and ester, and wherein substantially no copper salts are contained in the mixture.
    Type: Grant
    Filed: July 25, 2014
    Date of Patent: December 27, 2016
    Assignee: WEYLCHEM FRANKFURT GMBH
    Inventors: Klaus Forstinger, Reinhard Schwesinger, Andreas Maier
  • Publication number: 20160185695
    Abstract: The present invention relates to a method for the preparation of phenols, in which an aryldiazonium salt, which is prepared by the diazotisation of a corresponding aromatic, primary amine, is decomposed by heating in a mixture containing hot water, a mineral acid and an organic solvent, wherein the organic solvent contains a ketone of formula (I) R1C(O)R2 in which R1 and R2 independently stand for (C1-C5)-alkyl and R1 and R2 together have at least four carbon atoms, wherein the aromatic primary amine is aniline or a substituted aniline, which contains at least one further substituent which is selected from: alkyl, alkenyl, alkynyl, halogen, haloalkyl, cycloalkyl, heteroaryl, carboxyl, cyan, alkoxyl and ester, and wherein substantially no copper salts are contained in the mixture.
    Type: Application
    Filed: July 25, 2014
    Publication date: June 30, 2016
    Applicant: WEYCHEM FRANKFURT GMBH
    Inventors: Klaus FORSTINGER, Reinhard SCHWESINGER, Andreas MAIER
  • Patent number: 8338649
    Abstract: The invention relates to a method for the production of an aromatic carbonyl compound by the oxidation of a methyl group or methylene group bonded to the aromatic group in which the aromatic substance is reacted in the presence of an oxidizing agent and a sulphoxide, a sulphoxide being selected for the oxidation of a specific aromatic substance whose ionization potential, in terms of magnitude, differs from the ionization potential of the aromatic substance to be oxidized by a maximum of ±0.25 eV.
    Type: Grant
    Filed: September 2, 2008
    Date of Patent: December 25, 2012
    Assignee: Weylchem Frankfurt GmbH
    Inventors: Klaus Forstinger, Thomas Sommer, Daniel Decker, Andreas Martin, Angela Köckritz, Michael Kant, Alexander Hofmann
  • Publication number: 20100312017
    Abstract: The invention relates to a method for the production of an aromatic carbonyl compound by the oxidation of a methyl group or methylene group bonded to the aromatic group in which the aromatic substance is reacted in the presence of an oxidising agent and a sulphoxide, a sulphoxide being selected for the oxidation of a specific aromatic substance whose ionisation potential, in terms of magnitude, differs from the ionisation potential of the aromatic substance to be oxidised by a maximum of ±0.25 eV.
    Type: Application
    Filed: September 2, 2008
    Publication date: December 9, 2010
    Inventors: Klaus Forstinger, Thomas Sommer, Daniel Decker, Andreas Martin, Angela Köckritz, Michael Kant, Alexander Hofmann
  • Patent number: 7323599
    Abstract: A process for preparing amines of the general formula (I) R1R2CHNR3R4??(I) in which R1, R2, R3 and R4 are each independently hydrogen, straight-chain or branched, halogenated or halogen-free C1-C12-alkyl, C3-C12-cycloalkyl, C6-C10-aryl or C7-C11-aralkyl, by catalytic, hydrogenating amination of carbonyl compounds of the general formula (II) R1—C(?O)—R2??(II) with nitrogen compounds of the general formula (III) HNR3R4??(III) in the presence of bifunctional catalyst systems comprising a.) a hydrogenation-active catalyst component comprising one or more metals of transition group 8 of the Periodic Table and b.) one or more solid, acidic cocatalysts, wherein the hydrogenating amination is carried out in the presence of aqueous ammonia or aqueous amine of the formula (III) and at least one organic solvent miscible with ammonia or the aqueous amine of the formula (III).
    Type: Grant
    Filed: September 25, 2006
    Date of Patent: January 29, 2008
    Assignee: Clariant Speciality Fine Chemicals (Deutschland) GmbH
    Inventors: Daniel Schramm, Daniel Decker, Klaus Forstinger, Klemens Flick
  • Publication number: 20070185353
    Abstract: The invention relates to a method for producing alkylene glycol diethers by reacting a linear or cyclic ether with an alkylene oxide in the presence of a Lewis acid. The invention is characterized in that the reaction is continuously carried out in a micro reactor.
    Type: Application
    Filed: February 8, 2005
    Publication date: August 9, 2007
    Applicant: CLARIANT PRODUKTE (DEUTSCHLAND) GMBH
    Inventors: Alexander Snell, Achim Stankowiak, Gabriele Oberendfellner, Hieng Kim, Klaus Forstinger, Christian Wille
  • Publication number: 20070078282
    Abstract: A process for preparing amines of the general formula (I) R1R2CHNR3R4??(I) in which R1, R2, R3 and R4 are each independently hydrogen, straight-chain or branched, halogenated or halogen-free C1-C12-alkyl, C3-C12-cycloalkyl, C6-C10-aryl or C7-C11-aralkyl, by catalytic, hydrogenating amination of carbonyl compounds of the general formula (II) R1—C(?O)—R2??(II) with nitrogen compounds of the general formula (III) HNR3R4??(III) in the presence of bifunctional catalyst systems comprising a.) a hydrogenation-active catalyst component comprising one or more metals of transition group 8 of the Periodic Table and b.) one or more solid, acidic cocatalysts, wherein the hydrogenating amination is carried out in the presence of aqueous ammonia or aqueous amine of the formula (III) and at least one organic solvent miscible with ammonia or the aqueous amine of the formula (III).
    Type: Application
    Filed: September 25, 2006
    Publication date: April 5, 2007
    Inventors: Daniel Schramm, Daniel Decker, Klaus Forstinger, Klemens Flick
  • Publication number: 20060142588
    Abstract: The invention relates to a method for the production of ?-keto-carboxylic acid derivatives of formula (I) or the salts thereof, where X?NR?, O or S, R, R?, R1-R4 independently ?H, alkyl, alkenyl, aryl or heteroaryl, by reaction of a diketene of formula (II) with a compound comprising an active hydrogen of formula ROH, NHRR? or RSH, characterised in that the reaction is continuously carried out in a microreactor.
    Type: Application
    Filed: December 13, 2003
    Publication date: June 29, 2006
    Inventors: Uwe Nickel, Detlef Wehle, Leonhard Unverdorben, Klaus Forstinger, Hieng Kim
  • Publication number: 20060131762
    Abstract: The invention relates to a method for the production of substituted aromatic compounds by producing lithium arylene and by reacting it with suitable electrophiles. The method comprises the following steps (step 1); an aryl lithium compound ( auxiliary base”) is initially produced by reacting a halogen aromatic compound with lithium metal; said compound is subsequently (step 2) reacted for deprotonation of the aromatic substrate in order to form the corresponding lithium aromatic compound which is subsequently (step 3) reacted with a corresponding electrophile to form the desired substituted aromatic compound, see page 2 of the description.
    Type: Application
    Filed: August 21, 2003
    Publication date: June 22, 2006
    Inventors: Andreas Meudt, Bernd Lehnemann, Michael Erbes, Klaus Forstinger
  • Patent number: 7022857
    Abstract: A process for preparing compounds of the formula (II), where the substituents R1 to R5 are each independently H, CH3, straight-chain or branched C1–C8-alkyl, CH(OC1–C5-alkyl)2, CH(C1–C5-alkyl)(OC1–C5-alkyl), CH2(OC1–C5-alkyl), CH(CH3)(OC1–C5-alkyl), C1–C8-alkoxy, N(C1–C5-alkyl)2, phenyl, substituted phenyl, aryl, heteroaryl, S(C1–C5-alkyl) or a radical Caryl, alkyl, and the symbols X1 to 5 are each carbon or a maximum of two neighboring X1-5 are nitrogen or X1R1 and X2R2 together are O, NH, N(C1–C5-alkyl), N(C?O—C1–C5-alkyl), N(SiR3)2 or S, or where neighboring radicals R1 to R5 form the following structural unit, where X6 to X9 and R6 to R9 have the same meaning as X1 to X5 and R1 to R5 which comprises reacting chloro- or fluoroaromatics of the formula (I) with carbon electrophiles and lithium metal.
    Type: Grant
    Filed: October 2, 2003
    Date of Patent: April 4, 2006
    Assignee: Clariant GmbH
    Inventors: Andreas Meudt, Michael Erbes, Klaus Forstinger
  • Publication number: 20050258553
    Abstract: The invention relates to a method for binding heteroatom-carbon bonds. According to said method, a lithium compound (II) is first generated by reacting aliphatic or aromatic halogen compounds (I) with lithium metal, said compound is then used for the deprotonation of the compounds (III) or (V). The lithium salts of formulas (IV) or (VI) obtained by said deprotonation are subsequently reacted with suitable carbon electrophiles (equation I), said process binding the heteroatom-carbon bond and forming the products (VIII) or (VIII), (equation I).
    Type: Application
    Filed: August 21, 2003
    Publication date: November 24, 2005
    Inventors: Andreas Meudt, Bernd Lehnemann, Michael Erbes, Klaus Forstinger
  • Publication number: 20050001333
    Abstract: The present invention provides a process for preparing aryllithium compounds by reacting haloaliphatics with lithium metal to form a lithium alkyl and reacting the lithium alkyl with aromatic halogen compounds of formula (III) in a halogen-metal exchange reaction to form the corresponding lithium aromatics of formula (IV).
    Type: Application
    Filed: October 2, 2002
    Publication date: January 6, 2005
    Inventors: Detlef Wehle, Klaus Forstinger, Andreas Meudt
  • Publication number: 20040073032
    Abstract: A process for preparing compounds of the formula (II), 1
    Type: Application
    Filed: October 2, 2003
    Publication date: April 15, 2004
    Applicant: Clariant GmbH
    Inventors: Andreas Meudt, Michael Erbes, Klaus Forstinger
  • Patent number: 6657093
    Abstract: A process for preparing compounds of the formula (II), where the substituents R1 to R5 are each independently H, CH3, straight-chain or branched C1-C8-alkyl, CH(OC1-C5-alkyl)2, CH(C1-C5-alkyl)(OC1-C5-alkyl), CH2(OC1-C5-alkyl), CH(CH3)(OC1-C5-alkyl), C1-C8-alkoxy, N(C1-C5-alkyl)2, phenyl, substituted phenyl, aryl, heteroaryl, S(C1-C5-alkyl) or a radical Caryl, alkyl, and the symbols X1 to 5 are each carbon.
    Type: Grant
    Filed: June 13, 2002
    Date of Patent: December 2, 2003
    Assignee: Clariant GmbH
    Inventors: Andreas Meudt, Michael Erbes, Klaus Forstinger
  • Publication number: 20030100792
    Abstract: Process for preparing arylboron and alkylboron compounds of the formulae (II) and (III) by reacting arylmagnesium and alkylmagnesium halides of the formula (I) with boron compounds in microreactors in accordance with equation I or equation II, 1
    Type: Application
    Filed: August 1, 2002
    Publication date: May 29, 2003
    Applicant: Clariant GmbH
    Inventors: Manfred Koch, Detlef Wehle, Stefan Scherer, Klaus Forstinger, Andreas Meudt, Volker Hessel, Bernd Werner, Holger Lowe
  • Publication number: 20030069420
    Abstract: Process for preparing arylboron and alkylboron compounds of the formulae (II) and (III) by reacting lithioaromatics and lithiated aliphatics of the formula (I) with boron compounds in microreactors in accordance with equation I or equation II, 1
    Type: Application
    Filed: August 1, 2002
    Publication date: April 10, 2003
    Applicant: Clariant GmbH
    Inventors: Manfred Koch, Detlef Wehle, Stefan Scherer, Klaus Forstinger, Andreas Meudt
  • Publication number: 20030018192
    Abstract: A process for preparing compounds of the formula (II), 1
    Type: Application
    Filed: June 13, 2002
    Publication date: January 23, 2003
    Applicant: Clariant GmbH
    Inventors: Andreas Meudt, Michael Erbes, Klaus Forstinger
  • Publication number: 20020161230
    Abstract: A process for preparing boronic acids of the formula (I) and borinic acids of the formula (II), 1
    Type: Application
    Filed: February 28, 2002
    Publication date: October 31, 2002
    Applicant: Clariant GmbH
    Inventors: Andreas Meudt, Michael Erbes, Klaus Forstinger
  • Patent number: 5594145
    Abstract: The process for the preparation of 2(3H)-benzothiazolones which are optionally substituted on the benzene ring by reacting a 2-aminobenzothiazole which is optionally substituted on the benzene ring with a diazotization agent in the presence of aqueous hydrochloric acid, if appropriate with addition of a chloride, to give a diazonium chloride, reacting the diazonium chloride directly to give a 2-chlorobenzothiazole, which is optionally substituted on the benzene ring, and hydrolyzing the 2-chlorobenzothiazole, without intermediate isolation, at 120.degree.-200.degree. C. under reaction pressure.
    Type: Grant
    Filed: April 25, 1994
    Date of Patent: January 14, 1997
    Assignee: Hoechst AG
    Inventors: Klaus Forstinger, Heinrich Volk, Werner Wykypiel
  • Patent number: 5569776
    Abstract: Process for the preparation of 4-fluoroalkoxycinnamonitriles.The invention relates to a process for the preparation of fluoroalkoxycinnamonitriles of the formula (I) ##STR1## in which n is 1 to 8 and m is 1 to 17, where m.ltoreq.2n+1, by reacting 4-fluorobenzaldehyde with a fluoroalkanol of the formula (II)H.sub.2n+1-m F.sub.m C.sub.n O--H (II)in which m and n are as defined above, in the presence of a base and, if appropriate, a solvent, and reacting the resulting 4-fluoroalkoxybenzaldehyde with cyanoacetic acid or an alkyl cyanoacetate in the presence of a base and, if appropriate, a solvent.
    Type: Grant
    Filed: March 8, 1995
    Date of Patent: October 29, 1996
    Assignee: Hoechet AG
    Inventors: Matthias Beller, Klaus Forstinger