Abstract
A series of arylpiperazinylbutyl derivatives of 4,5-dihydro-1,2,4-triazine-6(1H)-ones was designed and synthesized according to the new solid-supported methodology. In this approach, triazinone scaffold was constructed from the Fmoc-protected glycine. The library representatives showed different levels of affinity for 5-HT7 and 5-HT1A receptors; compounds 13, 14 and 18-20 were classified as dual 5-HT7 /5-HT1A receptors ligands. The structure-affinity relationship analysis revealed that the receptor affinity and selectivity of the tested compounds depended on the kind of substituent in position 3 of triazinone fragment as well as substitution pattern of the phenylpiperazine moiety.
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