Sulfur Containing Patents (Class 554/42)
The sulfur is bonded directly to the carboxamide nitrogen or to an additional nitrogen (e.g., sulfonamide, sulfamic acid, etc.) (Class 554/43)
Sulfoxy containing (Class 554/44)
  • Amino acid derivatives
    Patent number: 5132441
    Abstract: Disclosed is an amino acid derivative represented by the general Formula (I): ##STR1## wherein R is a group whose conjugate acid has a pKa ranging from 10 to 16, R' is a straight chain alkyl group having 12 to 20 carbon atoms, n is an integer of 0 to 4, and X is --O--, --NH-- or --S--. These amino acid derivatives each having various eliminative groups can be synthesized by simple steps using optically active amino acids.
    Type: Grant
    Filed: January 18, 1990
    Date of Patent: July 21, 1992
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Mitsunori Ono