Abstract Herein, we report design, one pot synthesis and antibacterial evaluation of novel imidazopyridine bearing pyran bis-heterocycles. The compounds were synthesized in an aqueous solution of gluconic acid under both conventional heating and ultrasound irradiation. The target compounds were obtained in good to moderate yields with yield of 65–88% in 20–60 min under ultrasonic irradiation. The compounds
Synthesis and Biological Evaluation of Imidazopyridine-Oxindole Conjugates as Microtubule-Targeting Agents
作者:Ahmed Kamal、Vangala Santhosh Reddy、Santosh Karnewar、Sumit S. Chourasiya、Anver Basha Shaik、G. Bharath Kumar、Chandan Kishor、M. Kashi Reddy、M. P. Narasimha Rao、Ananthamurthy Nagabhushana、Kallaganti V. S. Ramakrishna、Anthony Addlagatta、Srigiridhar Kotamraju
DOI:10.1002/cmdc.201300308
日期:2013.12
A library of imidazopyridine–oxindoleconjugates was synthesised and investigated for anticancer activity against various human cancer cell lines. Some of the tested compounds, such as 10 a, 10 e, 10 f, and 10 k, exhibited promising antiproliferative activity with GI50 values ranging from 0.17 to 9.31 μM. Flow cytometric analysis showed that MCF‐7 cells treated by these compounds arrested in the G2/M
合成了咪唑并吡啶-羟吲哚缀合物文库,并研究了其对多种人类癌细胞系的抗癌活性。一些测试化合物,如10,10e中,10f中,与10千,表现出有前途的抗增殖活性与GI 50值的范围为0.17〜9.31μ中号。流式细胞仪分析表明,用这些化合物处理的MCF-7细胞以浓度依赖的方式停滞在细胞周期的G 2 / M期。更特别地,化合物10f对微管蛋白聚合显示出显着的抑制作用。所有这些化合物使线粒体膜电位去极化并引起细胞凋亡。这些结果进一步证实了Ser473处Akt的磷酸化降低。胚胎发育研究表明,铅化合物10 f和10 k导致斑马鱼胚胎发育延迟。化合物10 f与微管蛋白的对接表明,咪唑并[1,2- a ]吡啶部分占据了微管蛋白的秋水仙碱结合位点。
Copper- and DMF-mediated switchable oxidative C–H cyanation and formylation of imidazo[1,2-<i>a</i>]pyridines using ammonium iodide
作者:Xuan Li、Shoucai Wang、Jiawang Zang、Meichen Liu、Guangbin Jiang、Fanghua Ji
DOI:10.1039/d0ob01838d
日期:——
The cyanation and formylation of imidazo[1,2-a]pyridines were developed under copper-mediated oxidative conditions using ammonium iodide and DMF as a nontoxic combined cyano-group source and DMF as a formylation reagent. Mechanistic studies indicate that the cyanation of imidazo[1,2-a]pyridines proceeds through a two-step sequence: initial iodination and then cyanation. The cyanation has a broad substrate
咪唑并[1,2 - a ]吡啶的氰化和甲酰化是在铜介导的氧化条件下开发的,使用碘化铵和 DMF 作为无毒的组合氰基源,DMF 作为甲酰化试剂。机理研究表明,咪唑并[1,2 - a ]吡啶的氰化过程分为两步:初始碘化,然后是氰化。氰化具有广泛的底物范围和高官能团耐受性,并且可以在克级安全地进行。使用广泛可用的 DMF 作为甲酰化试剂和环境友好的分子氧作为氧化剂的新型铜介导的甲酰化也已被开发出来。该协议还为临床使用的沙利吡坦的合成提供了一种方便的方法。
Visible light induced tetramethylethylenediamine assisted formylation of imidazopyridines
作者:Golam Kibriya、Avik K. Bagdi、Alakananda Hajra
DOI:10.1039/c8ob00532j
日期:——
A metal-free visiblelight induced C-3 formylation of imidazo[1,2-a]pyridine has been developed using tetramethylethylenediamine (TMEDA) as a one carbon source. An array of 3-formyl imidazo[1,2-a]pyridines with wide functionality are synthesized using rose bengal as a photosensitizer under ambient air.
使用四甲基乙二胺(TMEDA)作为一种碳源,开发了一种无金属的可见光诱导的咪唑并[1,2- a ]吡啶的C-3甲酰化反应。在环境空气下,使用玫瑰红作为光敏剂,合成了具有广泛功能的3-甲酰基咪唑并[1,2- a ]吡啶。