Patent ID: 8772498

Claim:
A compound of formula (VII) wherein, R 1 represents hydrogen or (C 1 -C 4 )-alkyl, R 2 represents (C 1 -C 6 )-alkyl, (C 2 -C 4 )-alkenyl, (C 2 -C 4 )-alkynyl or (C 3 -C 7 )-cycloalkyl, where (C 1 -C 6 )-alkyl may be substituted by 1 to 3 substituents selected independently of one another from the group consisting of fluorine, chlorine, trifluoromethyl, trifluoromethoxy, (C 1 -C 4 )-alkoxy, (C 3 -C 7 )-cycloalkyl, (C 3 -C 7 )-cycloalkoxy, (C 1 -C 4 )-alkylsulfanyl and (C 1 -C 4 )-alkylsulfonyl, and where (C 2 -C 4 )-alkenyl and (C 2 -C 4 )-alkynyl may be substituted by 1 or 2 substituents selected independently of one another from the group consisting of fluorine, trifluoromethyl, (C 1 -C 4 )-alkyl, trifluoromethoxy and (C 1 -C 4 )-alkoxy, and where (C 3 -C 7 )-cycloalkyl may be substituted by 1 or 2 substituents selected independently of one another from the group consisting of fluorine, chlorine, trifluoromethyl, (C 1 -C 4 )-alkyl, trifluoromethoxy and (C 1 -C 4 )-alkoxy, or R 1 and R 2 together with the nitrogen atom to which they are attached form a 4- to 7-membered heterocycle which may contain a further heteroatom from the group consisting of N, O and S, where the 4- to 7-membered heterocycle may be substituted by 1 or 2 substituents selected independently of one another from the group consisting of fluorine, chlorine, oxo, trifluoromethyl, (C 1 -C 4 )-alkyl, trifluoromethoxy and (C 1 -C 4 )-alkoxy, R 4 represents hydrogen or the side group of a natural α-amino acid or its homologs or isomers, R 5 represents hydrogen or methyl, R 6A represents hydrogen, (C 1 -C 4 )-alkyl, or an amino protective group, R 7A represents hydrogen, (C 1 -C 4 )-alkyl, or an amino protective group, or R 6A and R 7A together with the nitrogen atom to which they are attached form a 5- or 6-membered heterocycle, where the 5- or 6-membered heterocycle may be substituted by 1 or 2 substituents independently selected from the group consisting of (C 1 -C 4 )-alkyl, amino, hydroxyl and (C 1 -C 4 )-alkoxy, or R 7A together with R 4 and the atoms, to which they are attached, forms a pyrrolidine or piperidine ring, or a salt thereof.