Patents by Inventor Mitsuhiro Kurita

Mitsuhiro Kurita 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 erythromycin derivative
    Patent number: 6897299
    Abstract: A method for preparing a fumarate salt of a compound represented by Formula (II): (wherein R1 represents a hydrogen atom or a lower alkyl group, and R2 represents a lower alkyl group), which comprises carbamating a compound represented by Formula (I): (wherein R1 represents a hydrogen atom or a lower alkyl group), removing all carbamate groups from this compound, alkylating the nitrogen atom at the 3?-position of the desosamine ring in the resulting compound to give the compound represented by Formula (II), and converting this compound into a fumarate salt, wherein the compound represented by Formula (I) is carbamated in the presence of a cyclic ether or a carboxylic ester. This method enables efficient preparation of high-quality erythromycin derivatives.
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: May 24, 2005
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Hitoshi Shimizu, Kaname Tsuzaki, Mitsuhiro Kurita
  • Process for producing erythromycin derivative
    Publication number: 20030195343
    Abstract: A method for preparing a fumarate salt of a compound represented by Formula (II): 1
    Type: Application
    Filed: March 3, 2003
    Publication date: October 16, 2003
    Inventors: Hitoshi Shimizu, Kaname Tsuzaki, Mitsuhiro Kurita