2,3-Dihydro-2-oxo-1<i>H</i>-benzimidazole-1-carboxamides with Selective Affinity for the 5-HT<sub>4</sub> Receptor: Synthesis and Structure−Affinity and Structure−Activity Relationships of a New Series of Partial Agonist and Antagonist Derivatives
作者:Inés Tapia、Luisa Alonso-Cires、Pedro Luis López-Tudanca、Ramón Mosquera、Luis Labeaga、Ana Innerárity、Aurelio Orjales
DOI:10.1021/jm981098j
日期:1999.7.1
reversal of the pharmacological activity due only to a small structural difference might confirm the existence of two binding sites on the 5-HT(4) receptor. In the alkylene spacer, a two-methylene chain is favorable to optimize the affinity and the antagonist or the partial agonist activity. In the ethyl and cyclopropyl series, 5-HT(4) antagonist activity seems to be unrelated to the size of the 4-substituent