Journal of Medicinal Chemistry p. 633 - 641 (1990)
Update date:2022-07-29
Topics:
Clark, Robin D.
Weinhardt, Klaus K.
Berger, Jacob
Fisher, Lawrence E.
Brown, Christine M.
et al.
A number of 1,9-alkano-bridged 2,3,4,5-tetrahydro-1H-3-benzazepines were prepared and evaluated for 5-HT1A receptor and α2-adrenoceptor affinity by using radioligand receptor binding techniques.Several compounds displayed 5-HT1A receptor affinity comparable to, or greater than, the known 5-HT1A ligand buspirone.The highest affinity 5-HT1A receptor ligands were N-alkyl-, N-allyl-5-chloro-, and 5-methoxy-1,2,3,4,8,9,10,10a-octahydronaphth<1,8-cd>azapines (4c, 4m, 4n), which had pKi values of 7.9-8.1.The S enantiomer of 4c had a higher affinity for the 5-HT1A receptor than the corresponding R isomer (pKi of 8.2 for (S)-4c vs 7.7 for (R)-4c).These compounds had a relatively low affinity for the α2-adrenoceptor (pKi of 7 or less).On the other hand, the closely related 5-chloro-2-methyl-2,3,4,8,9,9a-hexahydro-1H-indeno<1.7-cd>azepine (3b) had high affinity for both the α2-adrenoceptor (pKi=8.1) and 5-HT1A receptor (pKi=7.6).These results indicate that the two receptors may share common recognition sites.
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