| abstract |
The invention relates to derivatives of cyclic amino acids of the general formula in which R¹ is hydrogen, alkyl, alkenyl or (subst.) Aryl, R² is hydrogen, alkyl, hydroxy, alkoxy, (subst.) Aryl, (subst.) Aryloxy or (subst.) Aroyl, or R¹ and R² together for (subst .) Benzylidene or R¹ and R² together with the C atom they stand for (subst.) Cycloalkyl, R³ is hydrogen, hydroxymethyl, formyl, (subst.) Alkenyl, (subst.) Carboxylatocarbonyl, (subst.) Carbamoylatocarbonyl or (subst .) Trifluoromethylcarbonyl means, A stands for a cyclic amino acid, X means oxygen, imino or N-alkylimino, m = 0-5 and n = 0 or 1, process for their preparation, agents containing them and their use. |