Patents by Inventor Toshiaki Jyono

Toshiaki Jyono 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).

  • Method for producing asymmetric tetrasubstituted carbon atom-containing compound
    Patent number: 8378119
    Abstract: The invention provides an industrial method for producing a spiroaminopyrrolidone derivative, which is an intermediate for producing a quinolone antibacterial agent.
    Type: Grant
    Filed: February 28, 2012
    Date of Patent: February 19, 2013
    Assignee: Daiichi Sankyo Company, Limited
    Inventors: Yuichiro Tani, Yutaka Kitagawa, Makoto Muto, Toshiaki Jyono
  • METHOD FOR PRODUCING ASYMMETRIC TETRASUBSTITUTED CARBON ATOM-CONTAINING COMPOUND
    Publication number: 20120172605
    Abstract: The invention provides an industrial method for producing a spiroaminopyrrolidone derivative, which is an intermediate for producing a quinolone antibacterial agent.
    Type: Application
    Filed: February 28, 2012
    Publication date: July 5, 2012
    Applicant: DAIICHI SANKYO COMPANY, LIMITED
    Inventors: Yuichiro Tani, Yutaka Kitagawa, Makoto Muto, Toshiaki Jyono
  • Method for producing asymmetric tetrasubstituted carbon atom-containing compound
    Patent number: 8138352
    Abstract: The invention provides an industrial method for producing a spiroaminopyrrolidone derivative, which is an intermediate for producing a quinolone antibacterial agent. Specifically, the invention provides a method for producing a compound of formula (2): wherein n is an integer of 2 to 5; R1 is a (substituted) alkyl group or a (substituted) aryl group; and R2 represents a (substituted) alkoxycarbonyl group, a (substituted) aralkyloxycarbonyl group, a (substituted) aliphatic acyl group, or a (substituted) aromatic acyl group).
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: March 20, 2012
    Assignee: Daiichi Sankyo Company, Limited
    Inventors: Yuichiro Tani, Yutaka Kitagawa, Makoto Muto, Toshiaki Jyono
  • METHOD FOR PRODUCING ASYMMETRIC TETRASUBSTITUTED CARBON ATOM-CONTAINING COMPOUND
    Publication number: 20110144339
    Abstract: The invention provides an industrial method for producing a spiroaminopyrrolidone derivative, which is an intermediate for producing a quinolone antibacterial agent. Specifically, the invention provides a method for producing a compound of formula (2): wherein n is an integer of 2 to 5; R1 is a (substituted) alkyl group or a (substituted) aryl group; and R2 represents a (substituted) alkoxycarbonyl group, a (substituted) aralkyloxycarbonyl group, a (substituted) aliphatic acyl group, or a (substituted) aromatic acyl group).
    Type: Application
    Filed: February 22, 2011
    Publication date: June 16, 2011
    Applicant: DAIICHI SANKYO COMPANY, LIMITED
    Inventors: Yuichiro TANI, Yutaka Kitagawa, Makoto Muto, Toshiaki Jyono
  • Method for producing asymmetric tetrasubstituted carbon atom-containing compound
    Patent number: 7928232
    Abstract: The invention provides an industrial method for producing a spiroaminopyrrolidone derivative, which is an intermediate for producing a quinolone antibacterial agent. The invention provides a method for producing a compound represented by formula (2): (wherein n is an integer of 2 to 5; R1 represents a (substituted) alkyl group or a (substituted) aryl group; and R2 represents a (substituted) alkoxycarbonyl group, a (substituted) aralkyloxycarbonyl group, a (substituted) aliphatic acyl group, or a (substituted) aromatic acyl group), which includes treating a compound represented by formula (1): (wherein n, R1, and R2 are the same as defined above; and R3 represents a hydrogen atom, a (substituted) alkyl group, or a (substituted) aralkyl group) under a hydrogen gas atmosphere in the presence of a metallic catalyst.
    Type: Grant
    Filed: May 19, 2006
    Date of Patent: April 19, 2011
    Assignee: Daiichi Sankyo Company, Limited
    Inventors: Yuichiro Tani, Yutaka Kitagawa, Makoto Muto, Toshiaki Jyono
  • METHOD FOR PRODUCING ASYMMETRIC TETRASUBSTITUTED CARBON ATOM-CONTAINING COMPOUND
    Publication number: 20090054648
    Abstract: The invention provides an industrial method for producing a spiroaminopyrrolidone derivative, which is an intermediate for producing a quinolone antibacterial agent. The invention provides a method for producing a compound represented by formula (2): (wherein n is an integer of 2 to 5; R1 represents a (substituted) alkyl group or a (substituted) aryl group; and R2 represents a (substituted) alkoxycarbonyl group, a (substituted) aralkyloxycarbonyl group, a (substituted) aliphatic acyl group, or a (substituted) aromatic acyl group), which includes treating a compound represented by formula (1): (wherein n, R1, and R2 are the same as defined above; and R3 represents a hydrogen atom, a (substituted) alkyl group, or a (substituted) aralkyl group) under a hydrogen gas atmosphere in the presence of a metallic catalyst.
    Type: Application
    Filed: May 19, 2006
    Publication date: February 26, 2009
    Applicant: Daiichi Sankyo Company, Limited
    Inventors: Yuichiro Tani, Yutaka Kitagawa, Makoto Muto, Toshiaki Jyono