Patents by Inventor Guenter Schlegel

Guenter Schlegel 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 preparing phosphorus containing cyanohydrins
    Patent number: 10961265
    Abstract: The present invention relates primarily to a process for preparing certain phosphorus-containing cyanohydrins of the formula (I), and also to certain phosphorus-containing cyanohydrins per se and to their use for the preparation of glufosinate and/or glufosinate salts. The present invention further relates to certain mixtures particularly suitable for preparing the phosphorus-containing cyanohydrins of the formula (I).
    Type: Grant
    Filed: July 20, 2017
    Date of Patent: March 30, 2021
    Assignee: BASF SE
    Inventors: Hans-Joachim Ressel, Kilian Tellman, Mark James Ford, Martin Littmann, Friedrich August Muehlthau, Guenter Schlegel
  • Catalytic hydrogenation of nitriles
    Patent number: 9988353
    Abstract: The present invention relates to a novel catalytic hydrogenation of substituted 2-methyl cyanopyridyl derivatives, in particular 3-chloro-5-(trifluoromethyl)pyridin-2-yl]acetonitrile [=Py-CN] to substituted 2-ethylaminopyridine derivatives, in particular 2-[3-chloro-5-(trifluoromethyl)pyridin-2-yl]ethanamine [=Py-ethanamine] or salts thereof in the presence of metal catalysts, in particular palladium catalysts.
    Type: Grant
    Filed: November 11, 2014
    Date of Patent: June 5, 2018
    Assignee: BAYER CROPSCIENCE AKTIENGESELLSCHAFT
    Inventors: Wahed Ahmed Moradi, Thomas Himmler, Thomas Norbert Mueller, Albert Schnatterer, Guenter Schlegel
  • Preparation of N-[(6-chloropyridin-3-yl)methyl]-2,2-difluoroethan-1-amine by alkylation of 2,2-difluoroethylamine
    Patent number: 9890120
    Abstract: A process for preparing N-[(6-chloropyridin-3-yl)methyl]-2,2-difluoroethan-1-amine of formula (III) wherein 2,2-difluoroethylamine of formula (I) is reacted with a halide of formula (II) in the presence of a hydroxide of an alkali metal or alkaline earth metal.
    Type: Grant
    Filed: March 18, 2015
    Date of Patent: February 13, 2018
    Assignee: BAYER CROPSCIENCE AKTIENGESELLSCHAFT
    Inventors: Wahed Ahmed Moradi, Guenter Schlegel, Albert Schnatterer
  • Process for preparing phosphorus containing cyanohydrins
    Patent number: 9850263
    Abstract: The present invention relates primarily to a process for preparing certain phosphorus-containing cyanohydrins of the formula (I), and also to certain phosphorus-containing cyanohydrins per se and to their use for the preparation of glufosinate and/or glufosinate salts. The present invention further relates to certain mixtures particularly suitable for preparing the phosphorus-containing cyanohydrins of the formula (I).
    Type: Grant
    Filed: May 8, 2015
    Date of Patent: December 26, 2017
    Assignee: BAYER CROPSCIENCE AKTIENGESELLSCHAFT
    Inventors: Hans-Joachim Ressel, Kilian Tellman, Mark James Ford, Martin Littmann, Friedrich August Muehlthau, Guenter Schlegel
  • PROCESS FOR PREPARING PHOSPHORUS CONTAINING CYANOHYDRINS
    Publication number: 20170313730
    Abstract: The present invention relates primarily to a process for preparing certain phosphorus-containing cyanohydrins of the formula (I), and also to certain phosphorus-containing cyanohydrins per se and to their use for the preparation of glufosinate and/or glufosinate salts. The present invention further relates to certain mixtures particularly suitable for preparing the phosphorus-containing cyanohydrins of the formula (I).
    Type: Application
    Filed: July 20, 2017
    Publication date: November 2, 2017
    Inventors: Hans-Joachim RESSEL, Kilian TELLMAN, Mark James FORD, Martin LITTMANN, Friedrich August MUEHLTHAU, Guenter SCHLEGEL
  • Preparation of N-[(6-chloropyridin-3-yl)methyl]-2,2-difluoroethan-1-amine by alkylation of 2,2-difluoroethylamine
    Publication number: 20170081284
    Abstract: A process for preparing N-[(6-chloropyridin-3-yl)methyl]-2,2-difluoroethan-1-amine of formula (III) wherein 2,2-difluoroethylamine of formula (I) is reacted with a halide of formula (II) in the presence of a hydroxide of an alkali metal or alkaline earth metal.
    Type: Application
    Filed: March 18, 2015
    Publication date: March 23, 2017
    Applicant: BAYER CROPSCIENCE AKTIENGESELLSCHAFT
    Inventors: Wahed Ahmed MORADI, Guenter SCHLEGEL, Albert SCHNATTERER
  • PROCESS FOR PREPARING PHOSPHORUS CONTAINING CYANOHYDRINS
    Publication number: 20170081349
    Abstract: The present invention relates primarily to a process for preparing certain phosphorus-containing cyanohydrins of the formula (I), and also to certain phosphorus-containing cyanohydrins per se and to their use for the preparation of glufosinate and/or glufosinate salts. The present invention further relates to certain mixtures particularly suitable for preparing the phosphorus-containing cyanohydrins of the formula (I).
    Type: Application
    Filed: May 8, 2015
    Publication date: March 23, 2017
    Applicant: BAYER CROPSCIENCE AKTIENGESELLSCHAFT
    Inventors: Hans-Joachim RESSEL, Kilian TELLMAN, Mark James FORD, Martin LITTMANN, Friedrich August MUEHLTHAU, Guenter SCHLEGEL
  • CATALYTIC HYDROGENATION OF NITRILES
    Publication number: 20160280648
    Abstract: The present invention relates to a novel catalytic hydrogenation of substituted 2-methyl cyanopyridyl derivatives, in particular 3-chloro-5-(trifluorometyl)pyridin-2-yl]acetonitrile [=Py-CN] to substituted 2-ethylaminopyridine derivatives, in particular 2-[3-chloro-5-(trifluorometyl)pyridin-2-yl]ethanamine [=Py-ethanamine] or salts thereof in the presence of metal catalysts, in particular palladium catalysts.
    Type: Application
    Filed: November 11, 2014
    Publication date: September 29, 2016
    Inventors: Wahed Ahmed MORADI, Thomas HIMMLER, Thomas Norbert MUELLER, Albert SCHNATTERER, Guenter SCHLEGEL
  • Process for preparing acylsulfamoylbenzamides
    Patent number: 8236986
    Abstract: The invention relates to a process for the preparation of a compound of formula (I): Which comprises reaction of a compound of formula (II) with a compound of the formula (III) in the presence of a chlorinating agent, followed by reaction of the resultant compound of the formula (IV) with a compound of formula (V) in the presence of a base: wherein the various symbols are as defined in claim 1.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: August 7, 2012
    Assignee: Bayer CropScience GmbH
    Inventors: Sergiy Pazenok, Mark James Ford, Guenter Schlegel