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    • 3. 发明公开
    • Conformationally constrained cyclic enkephalin analogs with delta receptor specificity
    • 三角洲受体特异性循环Enkephalinanaloge具有刚性构象。
    • EP0125469A1
    • 1984-11-21
    • EP84103793.0
    • 1984-04-05
    • GIBSON-STEPHENS INSTITUTE
    • Hruby, Victor J.Mosberg, Henry
    • C07K7/12A61K37/02
    • C07K14/702A61K38/00Y10S514/809Y10S930/26
    • Novel compounds which are capable of binding with enhanced specificity to the delta receptor are disclosed. The compounds are a series of cyclic, conformationally constrained analogs of enkephalins which display exceptional delta receptor specificity. The compounds of the present invention are polypeptides of the formula:
      wherein R' and R 2 , which may be the same or different, are hydrogen, methyl, or lower alkyl having 1 to 5 carbon atoms;

      R 3 and R 4 , which may be the same or different, are hydrogen, methyl, or lower alkyl having 1 to 5 carbon atoms, provided, however, that R 1 , R 2 , R 3 , and R 4 may not all be hydrogen when both n and m are zero;
      R 5 is hydrogen, L-tyrosine, D-tyrosine, or L-tyrosine or D-tyrosine substituted on the Na-amino with 1 or 2 lower alkyl or alkenyl groups;
      R 6 is a substituted or unsubstituted aromatic;
      R 7 is hydrogen or methyl;
      R 8 is carboxylate, carboxamide or amino acid residue; provided, however, that where m and n are zero; and R' and R 2 are both methyl groups; and R 3 and R 4 are both hydrogen; and R 7 is hydrogen; R 8 is an amino acid residue;
      X and Y are hydrogen or methyl; and,
      n and m, which may be the same or different, are 0 or 1.

      The novel compounds include those which have either agonist or antagonist activity. The compounds may be used to induce pharmacological or therapeutic effects, including analgesia, in humans and other animals.