Patents by Inventor Kunisuki Izawa

Kunisuki Izawa 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 optically active halohydrin compound
    Publication number: 20040082820
    Abstract: A process of preparing an optically active halohydrin compound characterized by comprising asymmetric hydrogen transfer reduction of an &agr;-haloketone compound in the presence of a group 9 transition metal compound having a substituted or unsubstituted cyclopentadienyl group and an optically active diamine compound. The asymmetric hydrogen transfer reduction is preferably conducted in the presence of a base.
    Type: Application
    Filed: June 25, 2003
    Publication date: April 29, 2004
    Inventors: Takayoshi Torii, Takayuki Hamada, Tomoyuki Onishi, Kunisuki Izawa, Takao Ikariya, Ryoji Noyori
  • Method for producing optically active phenylpropionic acid derivative
    Patent number: 6239305
    Abstract: Optically active N-(S-2-acetylthiomethyl-1-oxo-3-phenylpropyl)-glycine benzyl ester useful as an enkephalin inhibitory agent or ACE inhibitory agent can be produced at low cost in an industrial manner, by a method comprising subjecting optically active 2-hydroxymethyl-3-phenylpropionic acid and glycine benzyl ester to condensation to subsequently convert the hydroxyl group into an elimination group, and substituting the elimination group with an acetylthio group.
    Type: Grant
    Filed: December 7, 1999
    Date of Patent: May 29, 2001
    Assignee: Ajinomoto Co., Inc.
    Inventors: Takayuki Suzuki, Takayuki Hamada, Kunisuki Izawa