Synthesis and Structure−Activity Relationships of Potent and Orally Active 5-HT<sub>4</sub> Receptor Antagonists: Indazole and Benzimidazolone Derivatives
作者:John M. Schaus、Dennis C. Thompson、William E. Bloomquist、Alice D. Susemichel、David O. Calligaro、Marlene L. Cohen
DOI:10.1021/jm970857f
日期:1998.5.1
aminoalkylene chain led to potent 5-HT4 receptorantagonists. In particular, those systems in which the basic amine was substituted with groups capable of forming hydrogen bonds showed increased 5-HT4 receptorantagonist activity. While some of these compounds displayed high affinity for other neurotransmitter receptors (in particular, 5-HT3, alpha1, and 5-HT2A receptors), as the conformational flexibility
This invention relates to compounds which bind to serotonin receptors inside or outside the central nervous system, in particular compounds which bind to the 5-HT
2
or 5-HT
7
receptors, their preparation and use, compositions containing them, and methods of treatment using them.
Novel modulators of 5-HT4 receptors have been developed which have a selectivity for peripheral receptors rather than those of the central nervous systems. Theses include novel derivatives of known modulators as well as entirely novel entities. Surprisingly, the derivatised compounds of the known modulators maintain a high binding affinity to 5-HT4 receptors, despite the presence of an acidic moiety at the end of an optional chain. The entirely novel entities also exhibit good binding affinity to 5-HT4 receptors. All of the compounds of the invention have a common motif which includes a basic nitrogen moiety and an acidic moiety. The compounds of the invention, due at least in part to their high ionisation potential at physiological pH, have the unique properties of selectively for peripheral 5HT4 receptors over those of the CNS, good binding affinity, and selectively of 5HT4 receptors over other serotonin receptors.
The invention relates to modulators of peripheral 5-HT receptors, particularly 5-HT4 receptors, said modulators essentially selective for peripheral 5-HT receptors over receptors of the central nervous system. The invention allows for the treatment, amongst others, of gastrointestinal disorders, lower urinary tract disorders, and cardiovascular disorders without side effects related to CNS activity.