Patents by Inventor Nobumichi KUMAMOTO

Nobumichi KUMAMOTO 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: 11021499
    Abstract: Provided are a water-soluble triarylphosphine for a palladium catalyst, which has high selectivity in a telomerization reaction and is easily recovered with efficiency, an ammonium salt thereof, and a method for efficiently producing the same. Specifically, provided are bis(6-methyl-3-sulphophenyl)(2-methylphenyl)phosphine; a bis(6-methyl-3-sulphonatophenyl)(2-methylphenyl)phosphine diammonium salt obtained by reacting the phosphine with a tertiary amine having a total of 3 to 27 carbon atoms in groups bonded to one nitrogen atom; and a method for producing the same.
    Type: Grant
    Filed: November 7, 2018
    Date of Patent: June 1, 2021
    Assignees: KURARAY CO., LTD., HOKKO CHEMICAL INDUSTRY CO., LTD.
    Inventors: Eriko Honda, Tatsuya Yoshikawa, Tomoaki Tsuji, Hitoshi Koizumi, Kyoko Sugita, Nobumichi Kumamoto
  • Patent number: 10696701
    Abstract: Provided are a water-soluble triarylphosphine for a palladium catalyst, which has high selectivity in a telomerization reaction and can be recovered with efficiency, an ammonium salt thereof, and a method for efficiently producing the same. Specifically, provided are bis(6-methyl-3-sulphophenyl)phenylphosphine; a bis(6-methyl-3-sulphonatopheyl)phenylphosphine diammonium salt obtained by reacting the phosphine with a tertiary amine having a total of 3 to 27 carbon atoms in groups bonded to one nitrogen atom; and a method for producing the same.
    Type: Grant
    Filed: January 16, 2018
    Date of Patent: June 30, 2020
    Assignees: KURARAY CO., LTD., HOKKO CHEMICAL INDUSTRY CO., LTD.
    Inventors: Eriko Honda, Tatsuya Yoshikawa, Tomoaki Tsuji, Hitoshi Koizumi, Kyoko Sugita, Nobumichi Kumamoto
  • Patent number: 10494390
    Abstract: An organic magnesium phosphide expressed by Formula (1) below and an organic magnesium phosphide complex expressed by Formula (9) below are provided, and a manufacturing method of organic phosphorus compound is characterized in that the above compounds used as a reagent is reacted with an electrophile: wherein R1 and R2 are each independently an aliphatic group, heteroaliphatic group, alicyclic group, or heterocyclic group, and X is chlorine, bromine, or iodine, wherein R3 and R4 are each independently an aliphatic group, heteroaliphatic group, aromatic group, alicyclic group, or heterocyclic group, and X and Y are each independently chlorine, bromine, or iodine.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: December 3, 2019
    Assignee: HOKKO CHEMICAL INDUSTRY CO., LTD.
    Inventors: Kenta Suzuki, Nobumichi Kumamoto, Nobuhiro Ito, Shinji Hatae, Hiroyuki Suzuki
  • Publication number: 20190248815
    Abstract: An organic magnesium phosphide expressed by Formula (1) below and an organic magnesium phosphide complex expressed by Formula (9) below are provided, and a manufacturing method of organic phosphorus compound is characterized in that the above compounds used as a reagent is reacted with an electrophile: wherein R1 and R2 are each independently an aliphatic group, heteroaliphatic group, alicyclic group, or heterocyclic group, and X is chlorine, bromine, or iodine, wherein R3 and R4 are each independently an aliphatic group, heteroaliphatic group, aromatic group, alicyclic group, or heterocyclic group, and X and Y are each independently chlorine, bromine, or iodine.
    Type: Application
    Filed: June 29, 2017
    Publication date: August 15, 2019
    Inventors: Kenta SUZUKI, Nobumichi KUMAMOTO, Nobuhiro ITO, Shinji HATAE, Hiroyuki SUZUKI
  • Publication number: 20190071460
    Abstract: Provided are a water-soluble triarylphosphine for a palladium catalyst, which has high selectivity in a telomerization reaction and is easily recovered with efficiency, an ammonium salt thereof, and a method for efficiently producing the same. Specifically, provided are bis(6-methyl-3-sulphophenyl)(2-methylphenyl)phosphine; a bis(6-methyl-3-sulphonatophenyl)(2-methylphenyl)phosphine diammonium salt obtained by reacting the phosphine with a tertiary amine having a total of 3 to 27 carbon atoms in groups bonded to one nitrogen atom; and a method for producing the same.
    Type: Application
    Filed: November 7, 2018
    Publication date: March 7, 2019
    Inventors: Eriko HONDA, Tatsuya YOSHIKAWA, Tomoaki TSUJI, Hitoshi KOIZUMI, Kyoko SUGITA, Nobumichi KUMAMOTO
  • Publication number: 20180141967
    Abstract: Provided are a water-soluble triarylphosphine for a palladium catalyst, which has high selectivity in a telomerization reaction and can be recovered with efficiency, an ammonium salt thereof, and a method for efficiently producing the same. Specifically, provided are bis(6-methyl-3-sulphophenyl)phenylphosphine; a bis(6-methyl-3-sulphonatopheyl)phenylphosphine diammonium salt obtained by reacting the phosphine with a tertiary amine having a total of 3 to 27 carbon atoms in groups bonded to one nitrogen atom; and a method for producing the same.
    Type: Application
    Filed: January 16, 2018
    Publication date: May 24, 2018
    Applicants: KURARAY CO., LTD., HOKKO CHEMICAL INDUSTRY CO., LTD.
    Inventors: Eriko HONDA, Tatsuya YOSHIKAWA, Tomoaki TSUJI, Hitoshi KOIZUMI, Kyoko SUGITA, Nobumichi KUMAMOTO
  • Patent number: 9707551
    Abstract: The object of the present invention is to provide a new organic phosphorus ligand that can efficiently promote cross-coupling reaction to obtain the target substance at high yield, as well as a method of manufacturing such ligand whose steric characteristics and electronic characteristics can be fine-tuned and which can be used to cause cross-coupling reaction at high yield. As a means for achieving the aforementioned object, a phosphine compound expressed by General Formula (1) below is provided. (In the formula, R1 and R2 are each independently a secondary alkyl group, tertiary alkyl group, or cycloalkyl group, while R3 and R4 are each independently a hydrogen, aliphatic group, heteroaliphatic group, aromatic group, alicyclic group, or heterocyclic group. Note that R3 and R4 have no phosphorus atom and that R3 and R4 are not both hydrogen at the same time).
    Type: Grant
    Filed: January 23, 2014
    Date of Patent: July 18, 2017
    Assignee: HOKKO CHEMICAL INDUSTRY CO., LTD.
    Inventors: Nobumichi Kumamoto, Kenta Suzuki
  • Publication number: 20160052947
    Abstract: Provided are a water-soluble triarylphosphine for a palladium catalyst, which has high selectivity in a telomerization reaction and can be recovered with efficiency, an ammonium salt thereof, and a method for efficiently producing the same. Specifically, provided are bis(6-methyl-3-sulphophenyl)phenylphosphine; a bis(6-methyl-3-sulphonatophenyl)phenylphosphine diammonium salt obtained by reacting the phosphine with a tertiary amine having a total of 3 to 27 carbon atoms in groups bonded to one nitrogen atom; and a method for producing the same.
    Type: Application
    Filed: March 26, 2014
    Publication date: February 25, 2016
    Applicants: KURARAY CO., LTD., HOKKO CHEMICAL INDUSTRY CO., LTD.
    Inventors: Eriko HONDA, Tatsuya YOSHIKAWA, Tomoaki TSUJI, Hitoshi KOIZUMI, Kyoko SUGITA, Nobumichi KUMAMOTO
  • Publication number: 20160052948
    Abstract: Provided are a water-soluble triarylphosphine for a palladium catalyst, which has high selectivity in a telomerization reaction and is easily recovered with efficiency, an ammonium salt thereof, and a method for efficiently producing the same. Specifically, provided are bis(6-methyl-3-sulphophenyl)(2-methylphenyl)phosphine; a bis(6-methyl-3-sulphonatophenyl)(2-methylphenyl)phosphine diammonium salt obtained by reacting the phosphine with a tertiary amine having a total of 3 to 27 carbon atoms in groups bonded to one nitrogen atom; and a method for producing the same.
    Type: Application
    Filed: March 26, 2014
    Publication date: February 25, 2016
    Applicants: KURARAY CO., LTD., HOKKO CHEMICAL INDUSTRY CO., LTD.
    Inventors: Eriko HONDA, Tatsuya YOSHIKAWA, Tomoaki TSUJI, Hitoshi KOIZUMI, Kyoko SUGITA, Nobumichi KUMAMOTO
  • Publication number: 20150360214
    Abstract: The object of the present invention is to provide a new organic phosphorus ligand that can efficiently promote cross-coupling reaction to obtain the target substance at high yield, as well as a method of manufacturing such ligand whose steric characteristics and electronic characteristics can be fine-tuned and which can be used to cause cross-coupling reaction at high yield. As a means for achieving the aforementioned object, a phosphine compound expressed by General Formula (1) below is provided. (In the formula, R1 and R2 are each independently a secondary alkyl group, tertiary alkyl group, or cycloalkyl group, while R3 and R4 are each independently a hydrogen, aliphatic group, heteroaliphatic group, aromatic group, alicyclic group, or heterocyclic group. Note that R3 and R4 have no phosphorus atom and that R3 and R4 are not both hydrogen at the same time).
    Type: Application
    Filed: January 23, 2014
    Publication date: December 17, 2015
    Inventors: Nobumichi KUMAMOTO, Kenta SUZUKI