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Published on: September 23, 2015
1,2,3,4-tetrahydrocarbazoles as 5-HT6 serotonin receptor ligands
Jean Chang-Fong1, Jagadeesh B Rangisetty, Małgorzata Dukat
1Department of Medicinal Chemistry, School of Pharmacy, Virginia Commonwealth University, Richmond, VA 23298-0540, USA.
Abstract:
An investigation of the structure-affinity relationships for the binding of 4-(N,N-dimethylaminomethyl)-N(9)-arylsulfonyl-9H-1,2,3,4-tetrahydrocarbazoles (conformationally-constrained analogues of the benzenesulfonyltryptamine 5-HT(6) antagonist MS-245) at human 5-HT(6) receptors revealed that various arylsulfonyl substituents are tolerated and that the 4-(N,N-dimethylaminomethyl) group is not required for binding. In particular, N(9)-(4-aminobenzenesulfonyl)-9H-1,2,3,4-tetrahydrocarbazole (20, K(i)=29 nM) was found to bind with high affinity and represents the first member of a new structural class of agents with 5-HT(6) antagonist properties (pA(2)=7.0; cAMP hydrolysis assay).
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