Centrally acting serotonergic agents. Synthesis and structure-activity relationships of C-1- or C-3-substituted derivatives of 8-hydroxy-2-(di-n-propylamino)tetralin
摘要:
The synthesis and structure-activity relationships (SAR) of C-1- or C-3-substituted derivatives of 8-hydroxy-2-(di-n-propylamino)tetralin (8-OH-DPAT) are described. These analogs were synthesized via alkylation of the tetralone derivatives followed by reductive amination. All of the analogs were inactive at the dopamine D2 receptor. Among the 8-OMe or 8-OH C-1,N-disubstituted analogs synthesized, the cis analogs were more potent in the 5-HT1A binding assay than the corresponding trans analogs. However, in the case of 1-(cyclopropylmethyl)-N-n-propyl analogs, the trans isomer has a slightly higher 5-HT1A affinity than its cis counterpart. The order of binding potency for C-1 substitution was found to be allyl > hydroxymethyl> n-propyl > cyclopropylmethyl much greater than carbomethoxy. Interestingly, the 5-OMe analogs were found to be inactive in both the 5-HT1A and dopamine D2 binding assays. In the C-3 allyl-substituted analogs, 5-HT1A agonist activity was found to be considerably lower. In these examples, the trans analogs showed weak 5-HT1A binding activity whereas the cis analogs were inactive. Analogs with C-1,N,N-trisubstitution also showed a marked decrease in 5-HT1A binding affinity. Overall, the SAR study showed that cis C-1 substitution maintains the 5-HT1A agonist activity of 8-OH-DPAT whereas trans C-1 substitution displays somewhat diminished activity. On the other hand, the trans C-3 substitution shows modest agonist activity whereas cis C-3 substitution removes the activity completely.
This invention is therapeutically useful 2-aminotetralins and pharmaceutically acceptable acid addition salts thereof of the formula
These compounds are useful to treat central nervous system disorders, hypertension, diabetes, sexual impotency and to control appetite.
(EN) This invention is therapeutically useful 2-aminotetralins and pharmaceutically acceptable acid addition salts thereof of formula (I). These compounds are useful to treat central nervous system disorders, hypertension, diabetes, sexual impotency and to control appetite.(FR) La présente invention concerne des 2-aminotétraline thérapeutiquement utiles et leurs sels d'addition d'acide pharmaceutiquement acceptables, de formule (I). Ces composés sont utiles pour traiter des troubles du système nerveux central, l'hypertension, le diabète, l'impuissance sexuelle et pour réguler l'appétit.