Potent quinoxaline-spaced phosphono .alpha.-amino acids of the AP-6 type as competitive NMDA antagonists: synthesis and biological evaluation
摘要:
A series of alpha-amino-3-(phosphonoalkyl)-2-quinoxalinepropanoic acids was synthesized and evaluated for NMDA receptor affinity using a[H-3]CPP binding assay. Functional antagonism of the NMDA receptor complex was evaluated in vitro using a stimulated [H-3]TCP binding assay and in vivo by employing an NMDA-induced seizure model. Some analogues also were evaluated in the [H-3]-glycine binding assay. Several compounds of the AP-6 type show potent and selective NMDA antagonistic activity both in vitro and in vivo. In particular alpha-amino-7-chloro-3-(phosphonomethyl)-2-quinoxalinepropanoic acid (1) displayed an ED50 Of 1.1 mg/kg ip in the NMDA lethality model. Noteworthy is alpha-amino-6,7-dichloro-3-(phosphonomethyl)-2-quinoxalinepropanoic acid (3) with a unique dual activity, displaying in the NMDA receptor binding assay an IC50 of 3.4 nM and in the glycine binding assay an IC50 of 0.61 muM.
Naphtho- and Benzo[g]quinoxalino-Fused Oxazocinoquinolinones and Their Diaryl and Alkynyl Analogues from Quinolin-8-ols: A Library of Novel Polynuclear Heteroaromatics
The compounds of the formula: ##STR1## in which Q is the quinoxaline nucleus; m is one of the integers 0, 1 or 2; n is one of the integers 1,2 or 3; or a pharmaceutically acceptable salt, alkyl ester or ##STR2## where R.sup.3 and R.sup.4 are, independently, hydrogen, nitro, halo or methoxy, are NMDA antagonists useful in the treatment and prevention of central nervous system related pathological conditions resulting from overstimulation by excitatory amino acids.
Reaching strong absorption up to 700 nm with new benzo[<i>g</i>]quinoxaline-based heteroleptic copper(<scp>i</scp>) complexes for light-harvesting applications
heteroleptic Cu(I) complexes, we designed a novel diimine based on 4-(benzo[g]quinoxal-2′-yl)-1,2,3-triazole derivatives. The large π-conjugation of the benzoquinoxaline moiety shifted bathochromically the absorption with regard to other diimine-based Cu(I) complexes. Adding another Cu(I) core broadened the absorption and extended it to considerably longer wavelengths. Moreover, by fine-tuning the structure
杂配铜 ( I ) 配合物,以二亚胺作为发色单元,大体积二膦作为辅助配体,与相应的均配双(二亚胺)配合物相比,具有在激发态下伪 Jahn-Teller 效应降低的优势。然而,它们的最低吸收通常位于 350 至 500 nm 之间。针对稳定杂配 Cu( I ) 配合物在可见光中的强吸收,我们设计了一种基于 4-(benzo[ g ]quinoxal-2'-yl)-1,2,3-triazole 衍生物的新型二亚胺。苯并喹喔啉部分的大 π 共轭使其他基于二亚胺的 Cu( I ) 配合物的吸收向红移方向移动。添加另一个铜(我) 核心扩大了吸收并将其扩展到相当长的波长。此外,通过微调二螯合配体的结构,我们实现了高达 700 nm 的全色吸收,最大摩尔消光系数为 8000 M −1 cm −1 ( λ = 570 nm ),使该化合物具有吸引力光捕获天线。
Thermal and Microwave-Assisted Synthesis of Diels−Alder Adducts of [60]Fullerene with 2,3-Pyrazinoquinodimethanes: Characterization and Electrochemical Properties
作者:Ursula M. Fernández-Paniagua、Beatriz Illescas、Nazario Martín、Carlos Seoane、Pilar de la Cruz、Antonio de la Hoz、Fernando Langa
DOI:10.1021/jo9701344
日期:1997.5.1
[4+2] Cycloaddition reactions of six-membered heterocyclic o-quinodimethanes, generated ''in situ'' from pyrazine derivatives, to [60]fullerene, either under thermal or microwave irradiation are described. Other microwave assisted cycloadditions involving o-quinodimethanes derived from thiophene were also performed. A comparative study of the activation energy for the boat-to-boat conformational inversion has been carried out by dynamic NMR experiments, the Delta G(double dagger) values being highly dependent on the nature of the covalently attached heterocyclic systems. Theoretical calculations predict a more planar cyclohexene ring for the five member containing cycloadducts. The cycloaddition process is controlled by the HOMO of the heterocyclic o-quinodimethanes showing a LUMO(C-60)-HOMO(diene) energy differences typical for favoured cycloadditions. The redox properties of the novel organofullerenes have been determined by cyclic voltammetry in solution, showing a cathodically shifted first reduction potential values, related to [60]fullerene. Compound 15c bearing two cyano groups exhibited an opposite trend which was accounted for by the lower LUMO energy determined by semiempirical calculations.
US5118675A
申请人:——
公开号:US5118675A
公开(公告)日:1992-06-02
[EN] BENZO[G]QUINOXALINE DERIVATIVES AS EFFECTIVE COMPOUNDS AGAINST INFECTIOUS DISEASES<br/>[FR] DERIVES DE LA BENZO[G]QUINOXALINE COMPOSES EFFICACES CONTRE LES MALADIES INFECTIEUSES
申请人:AXXIMA PHARMACEUTICALS AG
公开号:WO2002094796A2
公开(公告)日:2002-11-28
The present invention relates to benzo[g]quinoxaline derivatives of the general formula (I), processes for manufacturing said benzo[g]quinoxaline derivatives, the use of the benzo[g]quinoxaline derivatives as pharmaceutically active agents, especially for the prophylaxis and/or treatment of infectious diseases and opportunistic infections, diabetes, cancer, inflammation, as well as compositions containing at least one benzo[g]quinoxaline derivative and/or pharmaceutically acceptable salt thereof. Further, the present invention is directed to methods for preventing and/or treating of infectious diseases, diabetes, cancer, and inflammation using the inventive benzo[g]quinoxaline derivatives.