我们合成了一系列新颖的4,9-二氧代-4,9-二氢-1 H-萘[2,3- d ] [1,2,3]三唑-3-鎓盐,可以将其视为类似物阳离子蒽醌。与我们之前报道的类似类似物不同,这些化合物显示出相对较弱的抗菌活性,但发挥了很强的抗癌活性(从低至μM到nM GI 50),尤其是针对黑色素瘤,结肠癌,非小细胞肺癌和中枢神经系统(CNS)癌症的治疗。这些化合物在结构上不同于其前身,因为它们具有直接连接到阳离子蒽醌骨架上的芳基而不是烷基链。对结构-活性关系(SAR)的进一步研究表明,芳环上的给电子取代基在通过共振效应增强抗癌活性方面具有重要作用。这些基团的立体位阻是不利的,但其影响不如共振效应。阳离子蒽醌类似物在N-1位的连接基团的差异是生物活性从抗菌药向抗癌药转换的主要结构因素。
against intracellular amastigotes, with IC50 values ranging from 4.4 to 32.7 µM. The index of molecular hydrophobicity (ClogP) ranged from 2.8 to 3.4, reflecting a lipophilicity/hydrosolubility rate suitable for transport across membranes, which may have resulted in the potent antileishmanial activity observed. Regarding structure-activityrelationship (SAR), compounds 14 and 19, containing a trimethoxy group
using Pd/C, we investigated catalyst poison as a controller of the catalyst activity. We found that the addition of Ph2S (diphenylsulfide) to the Pd/C-catalyzed hydrogenation reaction mixture led to reasonable deactivation of Pd/C. By the use of the Pd/C–Ph2S catalytic system, olefins, acetylenes, and azides can be selectively reduced in the coexistence of aromatic carbonyls, aromatic halides, cyano
Pd/C[Ph2S], was developed to achieve the highly chemoselectivehydrogenation of alkenes, acetylenes, azides, and nitrogroups in the presence of aromatic ketones, halides, benzyl esters, and N-Cbz protective groups. Instrumental analyses of the heterogeneous catalyst demonstrated that diphenyl sulfide was embedded on Pd/C via coordination of its sulfur atom to palladium metal or physical interaction with graphite
开发了一种固定在钯碳体系上的二苯硫醚Pd / C [Ph 2 S],以在芳族酮,卤化物,苄基酯存在下实现烯烃,乙炔,叠氮化物和硝基的高化学选择性氢化。和N-Cbz保护基。对非均相催化剂的仪器分析表明,二苯硫醚通过其硫原子与钯金属的配位或与活性炭石墨层的物理相互作用而嵌入Pd / C中。催化剂可被回收并重复使用至少五次,而反应活性没有任何显着损失。
Discovery, Synthesis, and Biological Evaluation of a Novel Group of Selective Inhibitors of Filoviral Entry
作者:Maria V. Yermolina、Jizhen Wang、Michael Caffrey、Lijun L. Rong、Duncan J. Wardrop
DOI:10.1021/jm1008715
日期:2011.2.10
Herein, we report the development of an antifiloviral screening system, based on a pseudotyping strategy, and its application in the discovery of a novel group of small molecules that selectivelyinhibit the Ebola and Marburg glycoprotein (GP)-mediated infection of human cells. Using Ebola Zaire GP-pseudotyped HIV particles bearing a luciferase reporter gene and 293T cells, a library of 237 small molecules
在此,我们报告了基于假型策略的抗丝病毒筛选系统的开发,及其在发现一组新的小分子中的应用,这些小分子选择性地抑制了埃博拉病毒和马尔堡糖蛋白 (GP) 介导的人类细胞感染。使用带有荧光素酶报告基因和 293T 细胞的 Ebola Zaire GP 假型 HIV 颗粒,筛选了 237 个小分子库以抑制 GP 介导的病毒进入。从该测定中,先导化合物8a被鉴定为丝状病毒进入的选择性抑制剂,IC 5030 μM。为了分析功效的官能团要求,然后使用“点击”化学制备的 56 种异恶唑和三唑衍生物对这种 3,5-二取代异恶唑进行结构-活性关系分析。该研究表明,虽然异恶唑环可以被三唑系统取代,但在8a 中发现的 5-(二乙氨基)乙酰胺取代基是抑制病毒细胞进入所必需的。3-芳基取代基的变化提供了许多更有效的抗病毒剂,IC 50值范围为2.5 μM。还发现先导化合物8a及其三种衍生物可阻断马尔堡糖蛋白 (GP) 介导的人类细胞感染。
Design, Synthesis and Anticancer Biological Evaluation of Novel 1,4-Diaryl- 1,2,3-triazole Retinoid Analogues of Tamibarotene (AM80)
We report herein the design and synthesis via click chemistry of twelve novel triazole retinoid analogues of tamibarotene (AM80) and the evaluation of their anticancer activities against six cancer cell lines: HL60, K562, 786, HT29, MCF7 and PC3. Among the synthesized compounds, two were more potent than tamibarotene against solid tumor cells, and one of them had similar potency to tamibarotene against