Cyclopentane- and -pentene-.beta.-amino acids

A cyclopentane- or pentene-62-amino acid compound of the formula (I):

• ##STR124## in which A and T independently represent a substituent selected from the group consisting of hydrogen, fluorine, chlorine, bromine, methyl which is monosubstituted or disubstituted by identical or different hydroxyl or benzyloxy substituents, ethyl which is monosubstituted or disubstituted by identical or different hydroxyl, phenyl or benzyloxy substituents, and straight-chain or branched propyl or butyl which is optionally monosubstituted or disubstituted by identical or different hydroxyl, phenyl or benzyloxy substituents;
• B and D independently represent a substituent selected from the group consisting of hydrogen, fluorine, chlorine, bromine, hydroxyl, methyl which is optionally monosubstituted or disubstituted by identical or different hydroxyl, phenyl or benzyloxy substituents, ethyl which is monosubstituted or disubstituted by identical or different hydroxyl, phenyl or benzyloxy substituents, and straight-chain or branched propyl or butyl which is optionally monosubstituted or disubstituted by identical or different hydroxyl, phenyl or benzyloxy substituents;
• E, G, L and M independently represent a substituent selected from the group consisting of hydrogen, fluorine, chlorine, bromine, hydroxyl and alkyl having up to 4 carbon atoms which is optionally monosubstituted or disubstituted by identical or different hydroxyl, phenyl or benzyloxy substituents;
• or
• B and D, E and G in each case together represent a radical of the formula:
• ##STR125## in which R.sup.6 and R.sup.7 are identical or different and represent a substituent selected from the group consisting of hydrogen, fluorine, chlorine, bromine or straight-chain or branched alkyl having up to 4 carbon atoms or phenyl;
• or
• E and G and/or B and D together represent the radical of the formula:
• B, D, E and G or E, G, L and M in each case together form a radical of the formula:
• ##STR126## in which D' and G' have the abovementioned meaning of D and G, but do not simultaneously represent hydrogen;
• G and L are identical or different and denote hydrogen or methyl;
• R.sup.2 represents a substituent selected from the group consisting of hydrogen, allyloxycarbonyl, benzyl, benzyloxycarbonyl, Boc or Fmoc, straight-chain or branched alkyl having up to 4 carbon atoms, straight-chain or branched acyl having up to 4 carbon atoms, and an amino acid residue of the formula:
• ##STR127## in which R.sup.9 denotes hydrogen, straight-chain or branched alkyl having up to 4 carbon atoms or benzyl;
• and
• R.sup.10 denotes hydrogen, tert-butoxycarbonyl or Fmoc;
• R.sup.3 represents hydrogen;
• V represents a member selected from the group consisting of an oxygen atom, a sulphur atom and the --NH group;
• R.sup.1 represents a substituent selected from the group consisting of hydrogen and straight-chain or branched alkyl having up to 4 carbon atoms, and phenyl which are optionally substituted by fluorine, chlorine, bromine, nitro, cyano, methyoxy or ethoxy;
• with the proviso that at least one of A, B, D, E, G, L, M and T is not hydrogen;
• a stereoisomeric form of said compound, an acid addition salt thereof, or a metal salt complex thereof.