1,3,4-Thiadiazole derivatives as selective inhibitors of iNOS versus nNOS: Synthesis and structure-activity dependence
摘要:
The synthesis of new compounds with a 1,3,4-thiadiazole structure, and their in vitro biological evaluation as inhibitors of both neuronal and inducible Nitric Oxide Synthase (nNOS and iNOS) is described. These compounds have been designed by an isosteric modification of a series of 4,5-dihydro-1H-pyrazole derivatives, previously described as the nNOS inhibitors. The insertion of the S atom in the heterocyclic ring induces a selective inhibition of the iNOS isoform. Some of these compounds show as iNOS inhibition percentage near of 100% at a concentration of 50 mu M, and the IC50 values measured for the more potent compounds are in a range of 20-40 mu M. (C) 2012 Elsevier Masson SAS. All rights reserved.
Thiadiazoline- and Pyrazoline-Based Carboxamides and Carbothioamides: Synthesis and Inhibition against Nitric Oxide Synthase
作者:Fabio Arias、M. Encarnación Camacho、M. Dora Carrión、Meriem Chayah、Miguel Romero、Juan Duarte、Miguel A. Gallo
DOI:10.1155/2018/9242616
日期:——
novel derivatives were synthesized combining the arylthiadiazoline or arylpyrazoline skeleton and a carboxamide or carbothioamide moiety, used as starting material ethyl 2-nitrobenzoates or substituted nitrobenzaldehydes, respectively. The structure-activity relationships of final molecules are discussed in terms of the R1 radical effects in the aromatic ring, the Y atom in the heterocyclicsystem, the
已经开发了两个新的吡唑啉和噻二唑啉杂环家族。报道了它们对一氧化氮合酶的两种不同异构体(诱导型和神经元 NOS)的抑制活性。新的衍生物合成结合芳基噻二唑啉或芳基吡唑啉骨架和甲酰胺或硫代甲酰胺部分,分别用作起始原料 2-硝基苯甲酸乙酯或取代的硝基苯甲醛。最终分子的构效关系根据芳环中的 R1 自由基效应、杂环系统中的 Y 原子、主链中的 X 杂原子以及甲酰胺或硫代硫酰胺中的 R2 取代基进行讨论。一般来说,噻二唑啉 (5a-e) 优先抑制神经元同种型;其中,5a 是最好的 nNOS 抑制剂(1 mM 时为 74.11%,IC50 = 420 μM)。相比之下,吡唑啉 (6a-r) 作为 iNOS 的表现优于 nNOS 抑制剂,6m 是该系列中最好的分子(1 mM iNOS 抑制时为 76.86%,IC50 = 130 μM)并且是所有测试化合物中最有效的。
1,3,4-Thiadiazole derivatives as selective inhibitors of iNOS versus nNOS: Synthesis and structure-activity dependence
作者:Luisa C. López-Cara、M. Dora Carrión、Antonio Entrena、Miguel A. Gallo、Antonio Espinosa、Ana López、Germaine Escames、Darío Acuña-Castroviejo、M. Encarnación Camacho
DOI:10.1016/j.ejmech.2012.01.047
日期:2012.4
The synthesis of new compounds with a 1,3,4-thiadiazole structure, and their in vitro biological evaluation as inhibitors of both neuronal and inducible Nitric Oxide Synthase (nNOS and iNOS) is described. These compounds have been designed by an isosteric modification of a series of 4,5-dihydro-1H-pyrazole derivatives, previously described as the nNOS inhibitors. The insertion of the S atom in the heterocyclic ring induces a selective inhibition of the iNOS isoform. Some of these compounds show as iNOS inhibition percentage near of 100% at a concentration of 50 mu M, and the IC50 values measured for the more potent compounds are in a range of 20-40 mu M. (C) 2012 Elsevier Masson SAS. All rights reserved.