PEPTIDES AS OXYTOCIN AGONISTS

摘要

The invention relates to compounds of formula (I) wherein R1 is hydroxy or amino; R2 is sec-butyl or isobutyl; R3 is lower alkyl, lower alkyl substituted by hydroxy, -(CH2)2C(O)-NH2, -(CH2)3-NH2 or -CH2-five membered aromatic heterocyclic group; R4 is hydrogen or lower alkyl; R5 is hydrogen or lower alkyl; or R4 and R5 may form together with the N and C atom to which they are attached a pyrrolidine ring optionally substituted by hydroxy or halogen, a piperidine ring or an azetidine ring; R6 is hydrogen, lower alkyl, lower alkyl substituted by hydroxy, -(CH2)2C(O)OH, -(CH2)2C(O)NH2, benzyl optionally substituted by amino or hydroxy, -CH2-five membered aromatic heterocyclic group, indolyl, -CH2-cycloalkyl, cycloalkyl, -(CH2)2-S- lower alkyl or is -(CH2)1-4-NH2; R6' is hydrogen or lower alkyl; or R6 and R6' are together cycloalkyl; X is -C(O)-CHR-NR'-C(O)-; R/R' are independently from each other hydrogen or lower alkyl; m is 2; O is 0 or 1; or a to pharmaceutically acceptable acid addition salt, to a racemic mixture or to its corresponding enantiomer and/or optical isomers thereof. It has been found that the present compounds are oxytocin receptor agonists for the treatment of autism, stress, including post traumatic stress disorder, anxiety, including anxiety disorders and depression, schizophrenia, psychiatric disorders and memory loss, alcohol withdrawel, drug addiction and for the treatment of Prader-Willi Syndrom.