Computer aided drug discovery of highly ligand efficient, low molecular weight imidazopyridine analogs as FLT3 inhibitors
摘要:
The FLT3 kinase represents an attractive target to effectively treat AML. Unfortunately, no FLT3 targeted therapeutic is currently approved. In line with our continued interests in treating kinase related disease for anti-FLT3 mutant activity, we utilized pioneering synthetic methodology in combination with computer aided drug discovery and identified low molecular weight, highly ligand efficient, FLT3 kinase inhibitors. Compounds were analyzed for biochemical inhibition, their ability to selectively inhibit cell proliferation, for FLT3 mutant activity, and preliminary aqueous solubility. Validated hits were discovered that can serve as starting platforms for lead candidates. (C) 2015 Elsevier Masson SAS. All rights reserved.
A facile method for direct Pd(OAc)2-catalyzed oxidative cross-coupling of unactivated imidazo[1,2-a]pyridine with simplearenes has been developed. The reaction shows good reaction efficiency, high regioselectivity, and good functional-group compatibility. This approach provides a useful protocol for the preparation of imidazo[1,2-a]pyridine–arene structure of interest in biological and pharmaceutical
已开发了一种简便的方法,用于未活化的咪唑并[1,2- a ]吡啶与简单的芳烃的直接Pd(OAc)2催化的氧化交叉偶联。该反应显示出良好的反应效率,高的区域选择性和良好的官能团相容性。该方法为生物和药物材料中感兴趣的咪唑并[1,2 - a ]吡啶-芳烃结构的制备提供了有用的方案。
Regioselective Synthesis of 2- and 3-Substituted Imidazo[1,2-<i>a</i>]pyridines
作者:Guoping Liu、Xuefeng Cong、Jiaheng He、Shunzhong Luo、Di Wu、Jingbo Lan
DOI:10.3184/174751912x13499663832261
日期:2012.12
A range of 2- or 3-substituted imidazo[1,2- a]pyridines were prepared from 2-aminopyridine derivatives and gem-dibromovinyl compounds by the tandem nucleophilic substitution (or nucleophilic addition)/cyclisation reaction.
A tridentate CNO-donor palladium(II) complex as efficient catalyst for direct C―H arylation: Application in preparation of imidazole-based push-pull chromophores
作者:Hui-Hong Li、Ratnava Maitra、Ya-Ting Kuo、Jie-Hong Chen、Ching-Han Hu、Hon Man Lee
DOI:10.1002/aoc.3956
日期:2018.1
A series of imidazolium chlorides for the formation of tridentate CNO‐donor palladium(II) complexes featuring N‐heterocycliccarbene moieties have been developed from cheap and readily available starting materials with high yields. Their palladium complexes were prepared by reactions between the ligand precursors and PdCl2 using K2CO3 as base in pyridine with reasonable yields. These air‐stable metal
已经开发出了一系列廉价的易得原料,并以高收率开发了一系列咪唑氯化物,用于形成三齿CNO-供体钯(II)配合物,这些配合物具有N-杂环卡宾部分。他们的钯配合物是通过在吡啶中使用K 2 CO 3作为碱,通过配体前体与PdCl 2之间的反应制备的,并具有合理的收率。使用1 H NMR和13 C 11 H NMR光谱和元素分析。进行了异核多键相关实验,以鉴定这些化合物的关键NMR信号。还通过单晶X射线衍射分析确定了两种配合物的结构。这些配合物中的一种已成功应用于杂环化合物与芳基溴化物之间的直接C–H功能化反应中,产生了优异的偶联产物收率。偶联反应是可扩展的,允许仅2mol%的Pd负载获得几克偶联产物。开发的催化剂系统可以直接大规模制备多个推挽生色团。研究了这些发色团基于紫外可见光谱和荧光光谱的光物理性质。这些生色团观察到具有中等量子效率的深蓝色光致发光和扭曲的分子内电荷转移激发态。进行密度泛函
Direct catalytic C–H arylation of imidazo[1,2-a]pyridine with aryl bromides using magnetically recyclable Pd–Fe3O4 nanoparticles
作者:Jaewoo Lee、Jooyoung Chung、Sang Moon Byun、B. Moon Kim、Chulbom Lee
DOI:10.1016/j.tet.2013.04.031
日期:2013.7
The direct C–H arylation of a heteroarene with aryl bromides has been achieved under the catalysis of magnetic nanoparticles. In the presence of bimetallic Pd–Fe3O4 heterodimer nanocrystals (1 mol % in palladium), the reaction of imidazo[1,2-a]pyridine with various aryl bromides gives the corresponding arylated products with exclusive C3-selectivity. The highly regioselective method is applicable to
在磁性纳米粒子的催化下,杂芳烃与芳基溴的直接C–H芳基化反应已经实现。在双金属Pd–Fe 3 O 4异质二聚体纳米晶体(在钯中为1 mol%)的存在下,咪唑并[1,2- a ]吡啶与各种芳基溴化物的反应提供了具有独占C3选择性的相应芳基化产物。高度区域选择性的方法适用于各种具有不同电子和空间特性的芳基溴化物。Pd–Fe 3 O 4纳米晶体可以通过简单的磁分离而回收,并且已经被回收了十次而没有失去催化活性。
N-Heterocyclic carbene–palladium(<scp>ii</scp>)–1-methylimidazole complex catalyzed direct C–H bond arylation of imidazo[1,2-a]pyridines with aryl chlorides
We herein reported the N-heterocyclic carbene–palladium(II)–1-methylimidazole complex catalyzed direct C–H bond arylation of imidazo[1,2-a]pyridines with aryl chlorides. Under suitable conditions, all reactions between various imidazo[1,2-a]pyridines and aryl chlorides worked well to give the desired C3–H arylated products in acceptable to high yields, giving a convenient and alternative method for
我们在本文中报道了N-杂环卡宾-钯(II)-1-甲基咪唑配合物催化的咪唑并[1,2- a ]吡啶与芳基氯化物直接进行CH键芳构化。在合适的条件下,各种咪唑并[1,2- a ]吡啶与芳基氯化物之间的所有反应均能很好地产生所需的C3-H芳基化产物,并且收率高,从而为直接的C-H键提供了一种方便且可替代的方法使用经济且容易获得的芳基氯化物作为芳基化试剂,使咪唑并[1,2- a ]吡啶进行芳基化。