Condensed quinolinium and isoquinolinium derivatives
申请人:Egis Gyogyszergyar
公开号:US04994448A1
公开(公告)日:1991-02-19
The new compounds of the general Formula I ##STR1## (wherein R.sub.1 stands for C.sub.1-4 alkyl or aralkyl; and R.sub.2 represents hydroxy; or R.sub.1 and R.sub.2 together form a valency bond; R.sub.3 is hydrogen, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, phenyl, amino, alkylthio or a group of the Formula --NR.sub.7 R.sub.8 in which R.sub.7 and R.sub.8 may be the same or different and stand for hydrogen, C.sub.1-4 alkyl, phenyl-C.sub.1-4 alkyl, hydroxy-C.sub.1-4 alkyl or di-(C.sub.1-4 alkyl)-amino-C.sub.1-4 alkyl or together with the nitrogen atom they are attached to form a 6-membered heterocyclic ring which may optionally contain a further nitrogen, oxygen or sulfur atom; or R.sub.2 and R.sub.3 together form an oxo (.dbd.O) or thixo (.dbd.S) group; R.sub.4 represents hydrogen, C.sub.1-4 alkyl or phenyl which may optionally bear one or two halogen or nitro substituent(s); Z is a group of the Formula (a) or (b) ##STR2## A.sup.- represents an anion) and isomers thereof possess useful local anaesthetic, antidepressant, tranquillo-sedative and smooth muscle relaxant properties accompanied by a weaker analgesic effect and are useful in therapy.
Interaction of novel condensed triazine derivatives with central and peripheral type benzodiazepine receptors: synthesis, in vitro pharmacology and modelling
Structurally related sets of triazino-quinoline, triazino-isoquinoline and pyrido-triazine derivatives were synthesised and their binding interactions with central (CBR)- and peripheral-type (PBR) benzodiazepine binding sites have been characterised. Of 33 compounds tested, a new compound, 2-(4-methylphenyl)-3H-[1,2,4] triazino [2, 3-a] quinolin-3-one (1 g) showed the lowest CBR binding inhibition constant (K-i = 42 +/- 9 nM) and the highest CBR over PBR selectivity (> 1300). All but the 4-methylphenyl (1 g) structural modifications decreased the affinity and selectivity of the parent compound, 2-phenyl-3H- [ 1,2,4]triazino[2,3-a]quinolin-3-one (1d) (K-i = 69 +/- 9 nM, selectivity > 890). Molecular interactions between selected ligands (standards and triazine derivatives) and alpha(1)gamma(2) subunit-interface residues in a GABA(A) receptor extracellular domain homology model have been calculated. Comparing data with calculations confirmed hydrogen bonding to gamma(2)Thr142 and hydrophobic interaction with alpha 1His101 as being essential for high-affinity CBR binding. (c) 2006 Elsevier SAS. All fights reserved.
US4994448A
申请人:——
公开号:US4994448A
公开(公告)日:1991-02-19
Hajos, Gy.; Riedl, Zsuzsanna; Messmer, A., ACH - Models in Chemistry, 1994, vol. 131, # 3-4, p. 397 - 414