Patents by Inventor Mina Shimamura

Mina Shimamura 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).

  • Compound having hydantoin ring and method of producing the same
    Patent number: 8404860
    Abstract: A method of selectively producing the syn-isomer of a compound having a hydantoin ring, which is important as an optical material, an electronic material, an active ingredient and an intermediate of medicines and pesticides and an active ingredient and an intermediate of diagnostics, comprising converting a compound having a hydantoin ring (for example, (E,Z)-2-benzyloxy-5,7-diazaspiro[3,4]octan-6,8-dione represented by the following formula (1)) into a t-butyl ester derivative thereof (formula (2)), crystallizing the same to selectively give the syn-monoBoc isomer thereof and then leaving the t-butyloxycarbonyl group.
    Type: Grant
    Filed: July 24, 2012
    Date of Patent: March 26, 2013
    Assignee: Tokuyama Corporation
    Inventors: Hirofumi Shiigi, Mina Shimamura
  • COMPOUND HAVING HYDANTOIN RING AND METHOD OF PRODUCING THE SAME
    Publication number: 20120289705
    Abstract: A method of selectively producing the syn-isomer of a compound having a hydantoin ring, which is important as an optical material, an electronic material, an active ingredient and an intermediate of medicines and pesticides and an active ingredient and an intermediate of diagnostics, comprising converting a compound having a hydantoin ring (for example, (E,Z)-2-benzyloxy-5,7-diazaspiro[3,4]octan-6,8-dione represented by the following formula (1)) into a t-butyl ester derivative thereof (formula (2)), crystallizing the same to selectively give the syn-monoBoc isomer thereof and then leaving the t-butyloxycarbonyl group.
    Type: Application
    Filed: July 24, 2012
    Publication date: November 15, 2012
    Inventors: Hirofumi SHIIGI, Mina SHIMAMURA
  • Compound having hydantoin ring and method of producing the same
    Patent number: 8258313
    Abstract: A method of selectively producing the syn-isomer of a compound having a hydantoin ring, which is important as an optical material, an electronic material, an active ingredient and an intermediate of medicines and pesticides and an active ingredient and an intermediate of diagnostics, comprising converting a compound having a hydantoin ring (for example, (E,Z)-2-benzyloxy-5,7-diazaspiro[3,4]octan-6,8-dione represented by the following formula (1)) into a t-butyl ester derivative thereof (formula (2)), crystallizing the same to selectively give the syn-monoBoc isomer thereof and then leaving the t-butyloxycarbonyl group.
    Type: Grant
    Filed: July 9, 2008
    Date of Patent: September 4, 2012
    Assignee: Tokuyama Corporation
    Inventors: Hirofumi Shiigi, Mina Shimamura
  • COMPOUND HAVING HYDANTOIN RING AND METHOD OF PRODUCING THE SAME
    Publication number: 20100184993
    Abstract: A method of selectively producing the syn-isomer of a compound having a hydantoin ring, which is important as an optical material, an electronic material, an active ingredient and an intermediate of medicines and pesticides and an active ingredient and an intermediate of diagnostics, comprising converting a compound having a hydantoin ring (for example, (E,Z)-2-benzyloxy-5,7-diazaspiro[3,4]octan-6,8-dione represented by the following formula (1)) into a t-butyl ester derivative thereof (formula (2)), crystallizing the same to selectively give the syn-monoBoc isomer thereof and then leaving the t-butyloxycarbonyl group.
    Type: Application
    Filed: July 9, 2008
    Publication date: July 22, 2010
    Inventors: Hirofumi Shiigi, Mina Shimamura