Patents by Inventor Masaki Tomizawa

Masaki Tomizawa 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: 11964950
    Abstract: The present disclosure provides, for example, a compound represented by the general formula below or a pharmaceutically acceptable salt thereof, or a pharmaceutically acceptable solvate of the compound or salt: wherein X1, X2, X3 and X4 are each independently —CR2? or N?, R2 is, for example, a halogen atom, R1 is, for example, —S(?O)2—NH—R8, R8 is, for example, a C1-6 alkyl group, R3 is, for example, a hydrogen atom, R5 is, for example, a halogen atom, R6 is, for example, a hydrogen atom, and R4 is, for example, a cyclopropyl group. The compounds, salts or solvates provided by the present disclosure exhibit high RAF/MEK complex-stabilizing activity and can be used for the treatment or prevention of cell proliferative disorders, particularly cancers.
    Type: Grant
    Filed: July 20, 2022
    Date of Patent: April 23, 2024
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Yoshiaki Isshiki, Fumio Watanabe, Masaki Tomizawa, Kihito Hada, Kazuo Hattori, Kenichi Kawasaki, Ikumi Hyodo, Toshihiro Aoki
  • Publication number: 20230002333
    Abstract: The present disclosure provides, for example, a compound represented by general formula (6) below or a pharmaceutically acceptable salt thereof, or a pharmaceutically acceptable solvate of the compound or salt: wherein X1, X2, X3 and X4 are each independently —CR2? or —N?, R2 is, for example, a halogen atom, R1 is, for example, —S(?O)2—NH—R8, R8 is, for example, a C1-6 alkyl group, R3 is, for example, a hydrogen atom, R5 is, for example, a halogen atom, R6 is, for example, a hydrogen atom, and R4 is, for example, a cyclopropyl group. The compounds, salts or solvates provided by the present disclosure exhibit high RAF/MEK complex-stabilizing activity and can be used for the treatment or prevention of cell proliferative disorders, particularly cancers.
    Type: Application
    Filed: July 20, 2022
    Publication date: January 5, 2023
    Applicant: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Yoshiaki Isshiki, Fumio Watanabe, Masaki Tomizawa, Kihito Hada, Kazuo Hattori, Kenichi Kawasaki, Ikumi Hyodo, Toshihiro Aoki
  • Patent number: 8669367
    Abstract: To provide a method whereby a 2-azaadamantane can easily be obtained in good yield. A method for producing a 2-azaadamantane represented by the formula (1), which comprises cyclizing a compound represented by the following formula (2) in the presence of an acid.
    Type: Grant
    Filed: August 14, 2012
    Date of Patent: March 11, 2014
    Assignees: Nissan Chemical Industries, Ltd., Tohoku Techno Arch Co., Ltd.
    Inventors: Toshimasa Hamada, Noriaki Nagahama, Masami Kozawa, Yoshiharu Iwabuchi, Masatoshi Shibuya, Masaki Tomizawa, Yusuke Sasano
  • Publication number: 20120310005
    Abstract: To provide a method whereby a 2-azaadamantane can easily be obtained in good yield. A method for producing a 2-azaadamantane represented by the formula (1), which comprises cyclizing a compound represented by the following formula (2) in the presence of an acid.
    Type: Application
    Filed: August 14, 2012
    Publication date: December 6, 2012
    Applicants: TOHOKU TECHNO ARCH CO., LTD., Nissan Chemical Industries, Ltd.
    Inventors: Toshimasa HAMADA, Noriaki NAGAHAMA, Masami KOZAWA, Yoshiharu IWABUCHI, Masatoshi SHIBUYA, Masaki TOMIZAWA, Yusuke SASANO
  • Patent number: 8273889
    Abstract: The invention provides a method for producing 2-azaadamantanes represented by formula (1) in good yields. The method includes cyclizing a compound represented by formula (2) in the presence of an acid.
    Type: Grant
    Filed: November 20, 2008
    Date of Patent: September 25, 2012
    Assignees: Nissan Chemical Industries, Ltd., Tohoku Techno Arch Co., Ltd.
    Inventors: Toshimasa Hamada, Noriaki Nagahama, Masami Kozawa, Yoshiharu Iwabuchi, Masatoshi Shibuya, Masaki Tomizawa, Yusuke Sasano
  • Publication number: 20100311977
    Abstract: To provide a method whereby a 2-azaadamantane can easily be obtained in good yield. A method for producing a 2-azaadamantane represented by the formula (1), which comprises cyclizing a compound represented by the following formula (2) in the presence of an acid.
    Type: Application
    Filed: November 20, 2008
    Publication date: December 9, 2010
    Applicants: Nissan Chemical Industries, Ltd., Tohoku Techno Arch Co., Ltd.
    Inventors: Toshimasa Hamada, Noriaki Nagahama, Masami Kozawa, Yoshiharu Iwabuchi, Masatoshi Shibuya, Masaki Tomizawa, Yusuke Sasano
  • Patent number: 7705152
    Abstract: An alcohol oxidation catalyst which is an organic oxidation catalyst to oxidize an alcohol, which contains azabicyclo[3.3.1]nonane N-oxyl represented by the following formula (1) having an N-oxyl group incorporated in a bicycle[3.3.1]nonane skeleton: wherein X is H2, O or NOH.
    Type: Grant
    Filed: November 21, 2007
    Date of Patent: April 27, 2010
    Assignee: Nissan Chemical Industries, Ltd.
    Inventors: Yoshiharu Iwabuchi, Masatoshi Shibuya, Masaki Tomizawa
  • Publication number: 20090124806
    Abstract: To provide an industrially-useful and environmentally-friendly novel oxidation reaction.
    Type: Application
    Filed: May 6, 2008
    Publication date: May 14, 2009
    Applicant: Nissan Chemical Industries, Ltd.
    Inventors: Yoshiharu IWABUCHI, Masatoshi Shibuya, Masaki Tomizawa, Takahisa Sato, Susumu Sato
  • Publication number: 20080221331
    Abstract: An alcohol oxidation catalyst which is an organic oxidation catalyst to oxidize an alcohol, which contains azabicyclo [3.3.1]nonane N-oxyl represented by the following formula (1) having an N-oxyl group incorporated in a bicycle[3.3.1]nonane skeleton: wherein X is H2, O or NOH.
    Type: Application
    Filed: November 21, 2007
    Publication date: September 11, 2008
    Applicant: Nissan Chemical Industries Ltd.
    Inventors: Yoshiharu IWABUCHI, Masatoshi Shibuya, Masaki Tomizawa
  • Publication number: 20070232838
    Abstract: An organic oxidation catalyst for alcohols which is environmentally less harmful and with which efficient oxidation can be conducted. The oxidation catalyst for alcohols is a 1-alkyl-2-azadamantan-N-oxyl which has a nitroxyl group incorporated in the adamantane skeleton and was synthesized from as a base material a bicyclic compound obtained by the Grob-type ring-opening reaction of 1,3-adamantanediol. Due to the nitroxyl group on the adamantane skeleton, the ?-position hydrogen is stabilized based on Bredt's rule and the stability of the oxoammonium group generated by the oxidation thereof is ensured. Compared to TEMPO, which is a conventional oxidation catalyst, this catalyst is reduced in steric hindrance and is usable in a wide range of reaction fields. Because of this, not only a primary alcohol but a secondary alcohol having a sterically complicated structure, which has been difficult to oxidize with TEMPO, can be oxidized at a high efficiency.
    Type: Application
    Filed: June 24, 2005
    Publication date: October 4, 2007
    Inventors: Yoshiharu Iwabuchi, Masatoshi Shibuya, Masaki Tomizawa