Patents by Inventor Marcel STECK

Marcel STECK 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 cyclopropane compounds using diazo-compounds
    Patent number: 11780803
    Abstract: A process for the continuous production of a reaction product of a diazo-compound and a substrate in a multi-stage flow reactor is disclosed.
    Type: Grant
    Filed: June 25, 2019
    Date of Patent: October 10, 2023
    Assignee: GIVAUDAN SA
    Inventors: Fridtjof Schröder, Marcel Steck
  • PROCESS FOR THE PREPARATION OF CYCLOPROPANE COMPOUNDS USING DIAZO-COMPOUNDS
    Publication number: 20210253514
    Abstract: A process for the continuous production of a reaction product of a diazo-compound and a substrate in a multi-stage flow reactor is disclosed.
    Type: Application
    Filed: June 25, 2019
    Publication date: August 19, 2021
    Inventors: Fridtjof SCHRÖDER, Marcel STECK
  • Process for the cyclopropanation of olefins using N-methyl-N-nitroso compounds
    Patent number: 11034628
    Abstract: A process of converting a carbon-carbon double bond on a substrate into a cyclopropane ring, which method comprises the step of treating the substrate with a N-alkyl-N-nitroso compound, a transition metal catalyst and an aqueous base, wherein the N-alkyl-N-nitroso compound is formed by reacting an alkyl amine with an alkali metal nitrite in the presence of a mono-basic or di-basic acid, or a mixture thereof, and wherein the N-alkyl-N-nitroso compound is not distilled before it is mixed with the substrate, catalyst and base.
    Type: Grant
    Filed: December 31, 2019
    Date of Patent: June 15, 2021
    Assignee: Givaudan SA
    Inventors: Fridtjof Schröder, Marcel Steck
  • PROCESS FOR THE CYCLOPROPANATION OF OLEFINS USING N-METHYL-N-NITROSO COMPOUNDS
    Publication number: 20200172453
    Abstract: A process of converting a carbon-carbon double bond on a substrate into a cyclopropane ring, which method comprises the step of treating the substrate with a N-alkyl-N-nitroso compound, a transition metal catalyst and an aqueous base, wherein the N-alkyl-N-nitroso compound is formed by reacting an alkyl amine with an alkali metal nitrite in the presence of a mono-basic or di-basic acid, or a mixture thereof, and wherein the N-alkyl-N-nitroso compound is not distilled before it is mixed with the substrate, catalyst and base.
    Type: Application
    Filed: December 31, 2019
    Publication date: June 4, 2020
    Inventors: Fridtjof SCHRÖDER, Marcel STECK
  • Process for the cyclopropanation of olefins using N-methyl-N-nitroso compounds
    Patent number: 10611704
    Abstract: A process of converting a carbon-carbon double bond on a substrate into a cyclopropane ring, which method comprises the step of treating the substrate with a N-alkyl-N-nitroso compound, a transition metal catalyst and an aqueous base, wherein the N-alkyl-N-nitroso compound is formed by reacting an alkyl amine with an alkali metal nitrite in the presence of a mono-basic or di-basic acid, or a mixture thereof, and wherein the N-alkyl-N-nitroso compound is not distilled before it is mixed with the substrate, catalyst and base.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: April 7, 2020
    Assignee: Givaudan, S.A.
    Inventors: Fridtjof Schröder, Marcel Steck
  • PROCESS FOR THE CYCLOPROPANATION OF OLEFINS USING N-METHYL-N-NITROSO COMPOUNDS
    Publication number: 20190055172
    Abstract: A process of converting a carbon-carbon double bond on a substrate into a cyclopropane ring, which method comprises the step of treating the substrate with a N-alkyl-N-nitroso compound, a transition metal catalyst and an aqueous base, wherein the N-alkyl-N-nitroso compound is formed by reacting an alkyl amine with an alkali metal nitrite in the presence of a mono-basic or di-basic acid, or a mixture thereof, and wherein the N-alkyl-N-nitroso compound is not distilled before it is mixed with the substrate, catalyst and base.
    Type: Application
    Filed: September 14, 2016
    Publication date: February 21, 2019
    Inventors: Fridtjof SCHRÖDER, Marcel STECK