Discovery of dihydropyrazino-benzimidazole derivatives as metabotropic glutamate receptor-2 (mGluR2) positive allosteric modulators (PAMs)
作者:György Szabó、Sándor Kolok、Zoltán Orgován、Mónika Vastag、Zoltán Béni、János Kóti、Katalin Sághy、György I. Lévay、István Greiner、György M. Keserű
DOI:10.1016/j.ejmech.2019.111881
日期:2020.1
A scaffold hopping strategy converted the known 1-[(1-methyl-1H-imidazol-2-yl)methyl]-4-phenylpiperidine core (1 and 2) by cyclization to a fused [6 + 5+6] membered heterocyclic mGluR2 PAM scaffold. Pharmacophore guided structure-activityrelationship (SAR) studies resulted in a series of potent and metabolically stable mGluR2 PAMs. A representative optimized compound (95) having the most balanced
A series of novel 6-fluorochroman derivatives was prepared and evaluated as antagonists for the 5-HT1A receptor. N-2- [[(6-Fluorochroman-8-yl)oxy]ethyl]-4-(4-methoxyphenyl)butylamine (3; J. Med. Chem. 1997, 40, 1252-1257) was chosen as a lead, and structural modifications were done on the aliphatic portion of the chroman ring, the tether linking the middle amine and the terminal aromatic ring, the aromatic ring, and lastly the amine. Radioligand binding assays proved that the majority of the novel compounds behaved as good to excellent ligands at the 5-HT1A receptor, some of which were selective with respect to alpha(1)-adrenergic and D-2-dopaminergic receptors. The antagonist activity of the compounds was assessed in the forskolin-stimulated adenylate cyclase assays in CHO cells expressing the human 5-HT1A receptors. Among the modifications attempted, introduction of an oxo or an optically active hydroxy moiety at the chroman C-4 position was effective in ameliorating the receptor selectivity. Six analogues were selected through the in vitro screeds and further evaluated for their in vivo activities. A 4-oxochroman derivative (31n), having a terminal 1,3-benzodioxole ring, demonstrated antagonist activities toward 8-OH-DPAT-induced behavioral and electrophysiological responses in rats.
PLATELET AGGREGATION INHIBITORS
申请人:G.D. Searle & Co.
公开号:EP0659193A1
公开(公告)日:1995-06-28
US5354738A
申请人:——
公开号:US5354738A
公开(公告)日:1994-10-11
[EN] PLATELET AGGREGATION INHIBITORS<br/>[FR] INHIBITEURS DE L'AGREGATION PLAQUETTAIRE
申请人:G.D. SEARLE & CO.
公开号:WO1994005694A1
公开(公告)日:1994-03-17
(EN) This invention relates to compounds having formula (I) or a pharmaceutically acceptable salt thereof which are useful in the inhibition of platelet aggregation, to pharmaceutical compositions including the compounds, and to a method of inhibiting platelet aggregation in mammals by administering such compounds and compositions.(FR) L'invention concerne des composés représentés par la formule (I), ou un sel de ces derniers pharmaceutiquement acceptable, utilisés pour inhiber l'agrégation plaquettaire. L'invention porte également sur des compositions pharmaceutiques contenant lesdits composés, et des procédés d'inhibition de l'agrégation plaquettaire chez les mammifères par administration desdits composés et compositions.