6,7,8,9-Tetrahydro-N,N-di-n-propyl-3H-benzindol-8-amines. Derivatives as Potent and Orally Active Serotonin 5-HT1A Receptor Agonists
摘要:
Derivatives and isosteric derivatives of the potent 5-HT1A agonist 8-(di-n-propylamino)-6,7,8,9-tetrahydro-3H-benz[e]indole- 1-carbaldehyde (5) were prepared and evaluated in vivo and in vitro for serotonergic and dopaminergic activity. The 1-cyano analog 8 was found to be almost equipotent to 5 and the previously described 2-cyano derivative 6, while a I-chloro and 1-(1,1,1-trifluoroethyl) substituent (9 and 10, respectively) formed less potent derivatives. The isosteric 6,7,8,9-tetrahydro-1H-benz[g]indoles 4 and 12-15 showed surprisingly low affinity or activity at both serotonergic and dopaminergic systems. The interpretations of these results by means of drug-receptor interactions at the 5-HT1A subtype are discussed. Compounds 6 and 8 were found to have high oral bioavailability in the rat (63% and 54%, respectively).
(S)- and (R)-8-(di-n-propylamino)-6,7,8,9-tetrahydro-3H-benz[e]indole-1-carbaldehyde: a new class of orally active 5-HT1A-receptor agonists
摘要:
The enantiomers of 6,7,8,9-tetrahydro-N,N-di-n-propyl-3H-benz[e]indol-8-amine (S-(-)-2b and R-(+)-2b) and their corresponding 1-formyl analogs (S-(-)-6 and R-(+)-6) were prepared and evaluated pharmacologically for serotonergic and dopaminergic activity. The introduction of a formyl group in the 1-position shifted the pharmacological profile of 2b from a mixed D2/5-HT1A agonists to a selective 5-HT1A agonist (6). The enantiomers of 6 were agonists with full intrinsic activity and had an affinity comparable to that of 8-hydroxy-2-(di-n-propylamino)tetrahydronaphthalene (8-OH-DPAT). In contrast to 8-OH-DPAT, the enantiomers of compound 6 were found to have good oral availability.
Synthesis and evaluation of N,N-di-n-propyltetrahydrobenz[f]indol-7-amine and related congeners as dopaminergic agonists
作者:David E. Nichols、John M. Cassady、Paul E. Persons、Ming C. Yeung、James A. Clemens、E. Barry Smalstig
DOI:10.1021/jm00129a017
日期:1989.9
chain, compounds with the indole N-H located in the other "meta" position (i.e. 4-[2-(di-n-propylamino)ethyl]indole (2) or its rigid benz[e]indole analogue 3) were much more potent dopamineagonists. The results argue for a particular orientation of the indole N-H vector. In addition, relatively potent dopamineagonists also resulted when the pyrrole portion of the indole ring was replaced by a methanesulfonamido