Patents by Inventor Gohfu Susukamo

Gohfu Susukamo 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).

  • Asymmetric synthesis of cyclopropanecarboxylate derivatives using chiral copper complex as catalyst
    Patent number: 4603218
    Abstract: A chiral copper complex which is produced by the reaction of a chiral copper complex of the formula: ##STR1## wherein R.sub.1 is (a) alkyl group, or (b) aralkyl group; R.sub.2 is (a) 2-alkoxyphenyl group, or (b) 2-alkoxy-5-alkylphenyl group; either one of X.sub.1 and X.sub.2 is (a) hydrogen atom, (b) halogen atom, (c) alkyl group, (d) alkoxy group, or (e) nitro group, or adjacent X.sub.1 and X.sub.2 together form a benzo group, with a mono-substituted hydrazine of the formula:R.sub.3 NHNH.sub.2wherein R.sub.3 is (a) aryl group, (b) aralkyl group, or (c) alkyl group.The copper complex is used as a catalyst in the production of an optically active alkyl cyclopropanecarboxylate.
    Type: Grant
    Filed: July 30, 1985
    Date of Patent: July 29, 1986
    Assignee: Sumitomo Chemical Co., Ltd.
    Inventors: Tadatoshi Aratani, Hiroshi Yoshihara, Gohfu Susukamo
  • Chiral copper complex
    Patent number: 4552972
    Abstract: A chiral copper complex which is produced by the reaction of a chiral copper complex of the formula: ##STR1## wherein R.sub.1 is (a) alkyl group, or (b) aralkyl group; R.sub.2 is (a) 2-alkoxyphenyl group, or (b) 2-alkoxy-5-alkylphenyl group; either one of X.sub.1 and X.sub.2 is (a) hydrogen atom, (b) halogen atom (c) alkyl group, (d) alkoxy group, or (e) nitro group, or adjecent X.sub.1 and X.sub.2 together form a benzo group, with a mono-substituted hydrazine of a formula:R.sub.3 NHNH.sub.2wherein R.sub.3 is (a) aryl group, (b) aralkyl group, or (c) alkyl group.The copper complex is used as a catalyst in the production of an optically active alkyl cyclopropanecarboxylate.
    Type: Grant
    Filed: May 24, 1984
    Date of Patent: November 12, 1985
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Tadatoshi Aratani, Hiroshi Yoshihara, Gohfu Susukamo