[Problem to be Solved]
It is intended to provide a compound having PDE10A inhibitory activity and having a novel structure, or an isotope thereof or a pharmaceutically acceptable salt thereof, and a pharmaceutical composition comprising the same as an active ingredient.
[Solution]
The present invention provides a compound represented by the general formula (I) or a pharmaceutically acceptable salt thereof.
[EN] MODULATORS FOR NICOTINIC ACETYLCHOLINE RECEPTOR α2 AND α4 SUBUNITS<br/>[FR] MODULATEURS POUR LES SOUS-UNITÉS Α2 ET Α4 DE RÉCEPTEUR NICOTINIQUE DE L'ACÉTYLCHOLINE
申请人:SCRIPPS RESEARCH INST
公开号:WO2016191366A1
公开(公告)日:2016-12-01
Positive allosteric modulators (PAMs) of nicotinic acetylcholine receptors (nAChR) are important therapeutic candidates as well as valuable research tools. We identified a novel type II PAM, (R)-7-bromo-N-(piperidin-3-yl)benzo[b]thiophene-2-carboxamide (Br-PBTC), which both increases activation and reactivates desensitized nAChRs. This compound increases acetylcholine-evoked responses of α2* and α4* nAChRs, but is without effect on α3* or α6* nAChRs ("*" indicates presence of other nAChR subunits). Br-BPTC binds to the C-terminal extracellular sequences of a4 subunits, which is also a PAM site for steroid hormone estrogens such as 17-β estradiol. Br-PBTC is much more potent than estrogens. Like 17-P-estradiol, the non-steroid Br-PBTC only requires one α4 subunit to potentiate nAChR function, and its potentiation is stronger with more a4 subunits. This feature enables Br-BPTC to potentiate activation of (α4β2)(α6β2)β3 but not (α6β2)2β3 nAChRs. Various bioactive analogs of Br-PBTC are provided.
A novel series of benzothiophenederivatives was discovered as phosphodiesterase 10A (PDE10A) inhibitors. Structure-activity relationship studies on high-throughput screening hit compound 1 led to the identification of 7-acetyl-3-methyl-N-(quinolin-2-yl)-1-benzothiophene-2-carboxamide (16), with potent inhibitory activity (PDE10A IC50 = 7.6 nM) and selectivity (>1300-fold selectivity over the other