Carboxylic acids and skeletal muscle chloride channel conductance: effects on the biological activity induced by the introduction of methyl groups on the aromatic ring of chiral α-(4-chloro-phenoxy)alkanoic acids
摘要:
One or two methyl groups have been introduced on the aromatic ring of two chiral clofibric acid analogs, 2-(4-chloro-phenoxy)propanoic and 2-(4-chloro-phenoxy)butanoic acids. The biological activity of the derivatives obtained (3-6) has been evaluated on the skeletal muscle chloride conductance (gCl). The results confirm the hypothesis of two different sites modulating chloride channel function, an excitatory site that increases channel activity and an inhibitory site that produces a channel block. In fact, this chemical modification strongly reduces the blocking activity of the (R)-and (S)-enantiomers in comparison with the parent compounds, but does not markedly affect the ability of the (R)-enantiomers to increase chloride channel conductance. (C) 2001 Elsevier Science S.A. All rights reserved.
PHARMACEUTICAL COMPOSITION FOR MODULATING THE RESPONSE OF A GABA-A RECEPTOR
申请人:Universität Wien
公开号:EP3498273A1
公开(公告)日:2019-06-19
The present invention relates to a pharmaceutical composition for use as a medicament and to the use of the pharmaceutical composition for modulating the response of a GABAA receptor and the treatment of conditions like insomnia, anxiety, cardiac disease and/or epilepsy. Furthermore, the present invention refers to new active agents suitable for said pharmaceutical compositions.
Subunit-selective modulation of γ-aminobutyric acid type A receptors (GABAAR) is considered to exert fewer side effects compared to unselective clinically used drugs. Here, the β2/3 subunit-selective GABAAR modulators valerenic acid (VA) and loreclezole (LOR) guided the synthesis of novel subunit-selective ligands with simplified structures. We studied their effects on GABAARs expressed in Xenopus
与非选择性临床使用的药物相比,γ-氨基丁酸A型受体(GABA A R)的亚基选择性调节被认为产生的副作用更少。在这里,β2/ 3亚基选择性GABA A R调节剂戊烯酸(VA)和洛雷唑(LOR)指导了结构简化的新型亚基选择性配体的合成。我们使用两个微电极电压钳技术研究了它们对非洲爪蟾卵母细胞中表达的GABA A Rs的影响。与VA和LOR相比,五种化合物显示出对GABA诱发的电流的调制显着更有效,并且保留了效力和选择性。化合物18 [(E)-2–氰基-3-(2,4-二氯苯基)丁-2-烯酰胺]诱导了最大的GABA诱导的氯离子电流调制(E max:3114±242%),而12 [(Z)-3 -(2,4-二氯苯基)丁-2-乙腈]显示出最高的效价(EC 50:13±2μM)。此外,在海马神经元中12促进了阶段性和强直性GABA的抑制作用,并且体内研究显示,与戊二醛和LOR相比,抗戊烯四唑(PTZ)诱
Rapid and Efficient Synthesis of (<i>R</i>)-Aryloxypropionic Acid Esters Under Microwave Irradiation
作者:Zbigniew Ochal、Krzysztof Durka、Łukasz Banach
DOI:10.1080/00397910903395243
日期:2010.9.30
A series of (R)-(+)-ethyl aryloxypropionates (4a–4p) have been synthesized by the reaction of substituted phenols with ethyl (S)-(−)-tosyloxy lactate under the conditions of microwave irradiation and without solvents. The reaction conditions have been optimized. A good method for the preparation of (R)-(+)-ethyl aryloxypropionate was developed, with good yields, high enantiomer excess, short reaction
[EN] PROCESS FOR PREPARING (R)-ARYLOXYPROPIONIC ACID ESTER DERIVATIVES<br/>[FR] PROCEDE DE PREPARATION DE DERIVES D'ESTER D'ACIDE (R)-ARYLOXYPROPIONIQUE