Patents by Inventor Claudia Breindl

Claudia Breindl 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).

  • Process for the preparation of arylethylamines by amination of arylolefins
    Publication number: 20010047097
    Abstract: The invention relates to a process for the preparation of 2-arylethylamine derivates having an alkyl substituent in the 1-position, of the formula (I)
    Type: Application
    Filed: May 17, 2001
    Publication date: November 29, 2001
    Inventors: Harald Trauthwein, Matthais Beller, Claudia Breindl, Christian Hartung, Annegret Tillack
  • Base-catalyzed synthesis of 1-aryl-4-(aryl ethyl)piperazines from aromatic olefins and 1-arylpiperazines
    Patent number: 6313297
    Abstract: A process for preparing a 1-aryl-4-(arylethyl)piperazine of the formula (I) by reacting a 1-arylpiperazine of the formula (II) with an aromatic olefin of the formula (III) Ar′CR1═CHR2  (III) in an inert solvent in the presence of at least one basic catalyst, where in the formulae (I) to (III) Ar and Ar′ independently of one another are an aryl radical, selected from the group of the fused and unfused C6-C22-aromatics and the fused or unfused C5-C22-heteroaromatics which have at least one nitrogen, oxygen or sulfur atom in the ring; and R1 and R2 independently of one another are a hydrogen atom, a C1-C8-alkyl radical or an aryl radical Ar.
    Type: Grant
    Filed: July 13, 2000
    Date of Patent: November 6, 2001
    Assignees: Aventis Research & Technologies, GmbH & Co. KG
    Inventors: Jürgen Herwig, Matthias Beller, Claudia Breindl
  • Process for the preparation of 2,3-Dihydroindoles (indolines), novel 2,3-dihydroindoles, and their use
    Patent number: 6297270
    Abstract: A process for the preparation of 2,3-dihydroindoles of the formula (I) by reaction of halostyrenes of the formula (IIa) or (IIb) with amines of the formula (III) R1—NH2  (III) in at least one inert solvent or in water, and in the presence of at least one base.
    Type: Grant
    Filed: November 18, 1999
    Date of Patent: October 2, 2001
    Assignee: Aventis Research & Technologies GmbH & Co. KG
    Inventors: Matthias Beller, Thomas Riermeier, Harald Trauthwein, Claudia Breindl
  • Catalytic synthesis of N-alkylated anilines from olefins and anilines
    Patent number: 6222073
    Abstract: Process for the preparation of an N-arylethylaniline of the formula (I) Ar—N(R1)2-n(CHR2CHR3Ar′)n  (I) by reacting an aromatic olefin of the formula (II) Ar′CR3=CHR2  (II) with an aniline of the formula (III) Ar—N(R1)2-n(H)n  (III) in an inert solvent in the presence of at least one basic catalyst selected from the group consisting of alkali metal alcoholates and alkaline earth metal alcoholates or alkali metal amides and alkaline earth metal amides, where, in the formulae (I) to (III), Ar and Ar′, independently of one another, are an aryl radical selected from the group consisting of the fused and nonfused C6-C22-aromatics and of the fused or nonfused C5-C22heteroaromatics which have at least one nitrogen, oxygen or sulfur atom in the ring; R1, R2 and R3, independently of one another, are a hydrogen atom, a C1-C8-alkyl radical or an aryl radical Ar; and n is the number 1 or 2.
    Type: Grant
    Filed: July 3, 2000
    Date of Patent: April 24, 2001
    Assignee: Aventis Research & Technologies GmbH & Co. KG
    Inventors: Jürgen Herwig, Matthias Beller, Claudia Breindl, Harald Trauthwein, Elisabeth Eichberger, Anton Eichberger