investigate their monoamineoxidase inhibitory activity. The chemical structures of the compounds have been characterized by means of their IR, 1H NMR, 13C NMR spectroscopic data and elemental analyses. All the active compounds showed a selective activity towards the B isoform of the enzyme, regardless of the substitution on the heterocyclic ring. The inhibition of the enzymatic activity was measured on
为了研究它们对单胺氧化酶的抑制活性,已经合成了一些不同取代的3-芳基-4,5-二氢吡唑-1-碳硫代酰胺。化合物的化学结构已通过其IR,1 H NMR,13 C NMR光谱数据和元素分析进行了表征。不论杂环上的取代如何,所有活性化合物均显示出对酶B同工型的选择性活性。测定了在杆状病毒感染的BTI昆虫细胞中表达的人重组MAO同工型对酶活性的抑制。进行对接实验的目的是合理化抑制最具活性和选择性的化合物的机理。
Diastereoselective Synthesis of 4-Hydroxypiperidin-2-ones via Cu(I)-Catalyzed Reductive Aldol Cyclization
作者:Hon Wai Lam、Gordon J. Murray、James D. Firth
DOI:10.1021/ol052599j
日期:2005.12.1
[chemical reaction: see text]. 4-Hydroxypiperidin-2-ones may be prepared in highly diastereoselective fashion using a Cu(I)-catalyzed reductive aldol cyclization of alpha,beta-unsaturated amides with ketones. Used in combination with proline-catalyzed asymmetric Mannichreactions, this methodology enables the enantioselectivesynthesis of more highly functionalized piperidin-2-ones and hydroxylated
Synthesis of 4-(3-oxo-3-phenylpropyl)morpholin-4-ium chloride analogues and their inhibitory activities of nitric oxide production in lipopolysaccharide-induced BV2 cells
analogue, inhibited nitricoxide (NO) production, in this paper, various substituted benzene analogues with morpholine hydrochloride of 2 were synthesized and their inhibitory effects on NO production in lipopolysaccharide (LPS)-induced BV2 cells were tested. Among the synthesized compounds, 2-trifluoromethyl analogue 16n (IC50 = 8.6 μM) showed a significantly higher inhibitoryactivity than that of the
根据我们之前的报道,3-morpholino-1-phenylpropan-1-one 2是氟西汀的简化吗啉类似物之一,可抑制一氧化氮 (NO) 的产生,在本文中,本文合成了各种取代苯类似物与盐酸吗啉的2并测试了它们对脂多糖 (LPS) 诱导的 BV2 细胞中 NO 产生的抑制作用。在合成的化合物中,2-三氟甲基类似物16n (IC 50 = 8.6 μM) 显示出比母体化合物2a (IC 50 > 50 μM)显着更高的抑制活性,并且剂量依赖性地抑制 NO 产生而没有细胞毒性。化合物16n还在 2、10 和 20 μM 浓度下抑制 LPS 诱导的 BV2 细胞中 iNOS 的表达。这些结果表明,化合物16n通过抑制 iNOS 的表达来抑制 NO 的产生,并且可以用作开发新的 NO 产生抑制剂的先导结构。
Synthesis, structure characterization, and biological evaluation of some new 1,2,3-benzotriazole derivatives
and elemental analyses, coupled with three selected single-crystal structures (compounds A2, B3, and B5). Their antimycotic and antitumor activities were also investigated. The title compounds showed some antitumor activities, especially in the case of A3 and A4, which showed the most potent activity of propagation inhibition in liver and galactophore cancer cells.
合成了十种新颖的苯并三唑化合物。通过1 H NMR,IR和元素分析确认了它们的化学结构,以及三个选定的单晶结构(化合物A2,B3和B5)。还研究了它们的抗真菌和抗肿瘤活性。标题化合物显示出一些抗肿瘤活性,尤其是在A3和A4的情况下,它们在肝和半乳癌细胞中显示出最有效的增殖抑制活性。
In Vitro Anti-Candida Activity of Certain New 3-(1H-Imidazol-1-yl)propan-1-one Oxime Esters
Anti-Candida activities of certain new oximes 4a–d and their respective aromatic esters 5a–l are reported. The tested compounds 4a–d and 5a–l exhibited better anti-Candida profiles than fluconazole. Compound 5j, namely (E)-3-(1H-imidazol-1-yl)-1-phenylpropan-1-one O-4-chlorobenzoyl oxime emerged as the most active congener, with a MIC value of 0.0054 µmol/mL being more potent than both fluconazole