Patents by Inventor Minoru Hatanaka

Minoru Hatanaka 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).

  • Optically active .beta.-amino acid derivatives and their salts, and processes for producing the same
    Patent number: 4837343
    Abstract: Optically active .beta.-amino acid derivatives and their salts of the following formula: ##STR1## wherein COOR.sup.1 is an esterified or unesterified carboxyl group; R.sup.2 is hydrogen or a C.sub.1-10 acyl or esterified carboxyl group and processes for producing the same. These compounds permit important intermediate for the synthesis of 1.beta.-methylcarbapenem derivatives to be produced in an efficient way.
    Type: Grant
    Filed: September 1, 1987
    Date of Patent: June 6, 1989
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventor: Minoru Hatanaka
  • Acylation of 7-aminocephalosporanic acids
    Patent number: 4179557
    Abstract: 6-Aminoacylamidopenicillanic acid or 7-aminoacylamidocephalosporanic acids are produced in high yields by acylating 6-aminopenicillanic acid or 7-aminocephalosporanic acid with an amino acid, or a functional equivalent thereof, having its amino group protected with N,N-disubstituted .beta.-keto acid amide, and then removing the protecting group from the resulting protected 6-aminoacylamidopenicillanic acid or protected 7-aminoacylamidocephalosporanic acid by hydrolysis.
    Type: Grant
    Filed: December 26, 1973
    Date of Patent: December 18, 1979
    Assignee: President of Osaka University
    Inventors: Toshiyasu Ishimaru, Yasutsugu Shimonishi, Hisayuki Sakurai, Minoru Hatanaka
  • N-protected amino compounds
    Patent number: 4123611
    Abstract: 6-Aminoacylamidopenicillanic acid or 7-amino-acylamidocephalosporanic acids are produced in high yields by acylating 6-aminopenicillanic acid or 7-aminocephalosporanic acid with an amino acid, or a functional equivalent thereof, having its amino group protected with N,N-disubstituted .beta.-keto acid amide, and then removing the protecting group from the resulting protected 6-aminoacylamidopenicillanic acid or protected 7-aminoacylamidocephalosporanic acid by hydrolysis.
    Type: Grant
    Filed: January 6, 1975
    Date of Patent: October 31, 1978
    Assignee: President of Osaka University
    Inventors: Toshiyasu Ishimaru, Yasutsugu Shimonishi, Hisayuki Sakurai, Minoru Hatanaka