| abstract |
Compounds of formula (I) as well as methods for their preparation, their pharmaceutical preparations and their use. The compounds of formula (I) are useful in therapy, especially as analgesics and as immunosuppressive agents. R3, R4, R5, R6 are all H or R4 and R5 are both H and R3 and R6 are both lower alkyl groups or R3, R5, R6 are all H and R4 is F, Cl, Br, OH, NH2 or NO2; R7 is C = O or CH2; R8 is H or a lower alkyl group; R9 is (II), wherein m is 0-2 or (III) or (IV) or (V) or (VI) or (VII) or (VIII) wherein R10 is H, F, Cl, Br or I and m is 0-2; R11 is OH, NH2 or (IX) wherein R12 is H, NO2, F, Cl, Br or I, m is 0-2, R13 is COOH, CONH2, CH2OH, or any additional amino acid or peptide segment, or R11 is (X) wherein R14 is COOH, CONH2, CH2OH, or any additional amino acid or peptide segment; with the exceptions of the compounds wherein R1, R2, R3, R4, R5, R6 and R8 are all H, R7 is C = O and R9 is (XI) and R11 is Phe-OH, Phe-NH2, OH or NH2. |