Patents by Inventor Tomohiko Gotou

Tomohiko Gotou 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 producing imidazo[1,2-b]pyridazine compound
    Patent number: 8334379
    Abstract: A process for producing an imidazo[1,2-b]pyridazine compound represented by the formula (2): wherein R1, R2 and R3 are the same or different and each represents a hydrogen atom, a halogen atom, an alkyl group which may be substituted with a halogen atom or atoms, an alkenyl group which may be substituted with a halogen atom or atoms, or an alkoxy group which may be substituted with a halogen atom or atoms, which comprises reacting a 2,3-dihydropyridazine compound represented by the formula (1): wherein R1, R2 and R3 are the same meanings as defined above, with a phosphorus oxyhalide in the presence of an organic base which is in an amount of 0.5 mole or more relative to 1 mole of the 2,3-dihydropyridazine compound and 1 mole or less relative to 1 mole of the phosphorus oxyhalide.
    Type: Grant
    Filed: August 22, 2006
    Date of Patent: December 18, 2012
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Ichiro Komoto, Kazuaki Sasaki, Tomohiko Gotou
  • PROCESS FOR PRODUCING IMIDAZO[1,2-b]PYRIDAZINE COMPOUND
    Publication number: 20100234597
    Abstract: A process for producing an imidazo[1,2-b]pyridazine compound represented by the formula (2): wherein R1, R2 and R3 are the same or different and each represents a hydrogen atom, a halogen atom, an alkyl group which may be substituted with a halogen atom or atoms, an alkenyl group which may be substituted with a halogen atom or atoms, or an alkoxy group which may be substituted with a halogen atom or atoms, which comprises reacting a 2,3-dihydropyridazine compound represented by the formula (1): wherein R1, R2 and R3 are the same meanings as defined above, with a phosphorus oxyhalide in the presence of an organic base which is in an amount of 0.5 mole or more relative to 1 mole of the 2,3-dihydropyridazine compound and 1 mole or less relative to 1 mole of the phosphorus oxyhalide.
    Type: Application
    Filed: August 22, 2006
    Publication date: September 16, 2010
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Ichiro Komoto, Kazuaki Sasaki, Tomohiko Gotou
  • Uracil compounds and use thereof
    Patent number: 6667413
    Abstract: The present invention relates to an uracil compound of the formula [I]: wherein W represents oxygen, sulfur, imino or C1 to C3 alkylimino; Y represents oxygen, sulfur, imino or C1 to C3 alkylimino; R1 represents C1 to C3 alkyl or C1 to C3 haloalkyl; R2 represents C1 to C3 alkyl; R4 represents hydrogen or methyl; R5 represents C1 to C6 alkyl, C1 to C6 haloalkyl, or the like; X1 represents halogen, cyano or nitro; X2 represents hydrogen or halogen; and each of X3 and X4 independently represents hydrogen, halogen, C1 to C6 alkyl, or the like. The present compound has an excellent herbicidal activity.
    Type: Grant
    Filed: July 12, 2002
    Date of Patent: December 23, 2003
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Yoshitomo Tohyama, Yuzuru Sanemitsu, Tomohiko Gotou
  • Uracil compounds and use thereof
    Publication number: 20030130124
    Abstract: The present invention relates to an uracil compound of the formula [I]: 1
    Type: Application
    Filed: July 12, 2002
    Publication date: July 10, 2003
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Yoshitomo Tohyama, Yuzuru Sanemitsu, Tomohiko Gotou
  • Uracil compounds and use thereof
    Patent number: 6451740
    Abstract: The present invention relates to an uracil compound of the formula [I]: wherein W represents oxygen, sulfur, imino or C1 to C3 alkylimino; Y represents oxygen, sulfur, imino or C1 to C3 alkylimino; R1 represents C1 to C3 alkyl or C1 to C3 haloalkyl; R2 represents C1 to C3 alkyl; R4 represents hydrogen or methyl; R5 represents C1 to C6 alkyl, C1 to C6 haloalkyl, or the like; X1 represents halogen, cyano or nitro; X2represents hydrogen or halogen; and each of X3 and X4 independently represents hydrogen, halogen, C1 to C6 alkyl, or the like. The present compound has an excellent herbicidal activity.
    Type: Grant
    Filed: December 5, 2000
    Date of Patent: September 17, 2002
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Yoshitomo Tohyama, Yuzuru Sanemitsu, Tomohiko Gotou
  • Uracil compounds and use thereof
    Publication number: 20020013466
    Abstract: The present invention relates to an uracil compound of the formula [I]: 1
    Type: Application
    Filed: December 5, 2000
    Publication date: January 31, 2002
    Inventors: Yoshitomo Tohyama, Yuzuru Sanemitsu, Tomohiko Gotou