Selectfluor-mediated regioselective nucleophilic functionalization of N-heterocycles under metal- and base-free conditions
作者:Long-Yong Xie、Jie Qu、Sha Peng、Kai-Jian Liu、Zheng Wang、Man-Hua Ding、Yi Wang、Zhong Cao、Wei-Min He
DOI:10.1039/c7gc03106h
日期:——
A facile, practical and environmentally attractive protocol for the direct diversification of N-heterocycles under ambient, metal- and base-free conditions was developed.
在常温、无金属和无碱条件下,开发了一种简便、实用且环境友好的直接多样化N-杂环的协议。
Hypervalent iodine mediated oxidative radical amination of heteroarenes under metal-free conditions
作者:Feng Zhao、Ting Sun、Hefeng Sun、Gaolei Xi、Kai Sun
DOI:10.1016/j.tetlet.2017.06.081
日期:2017.8
A metal-free, PhI(OCOCF3)2-mediated CN bond forming reaction was developed between quinolines and nitrogen source, affording a facile route for the construction of 2-aminoquinolines via a nitrogen-centered radical process. This reaction represents a significant addition to the limited number of existing transition metal-catalyzed processes for the C-2 amination of quinolines and will find practical
Discrete Benzotriazole‐Copper(II) Complexes in Chelated and Non‐Chelated Coordination Modes: Structural Analysis and Catalytic Application in Click and A
<sup>3</sup>
Coupling Reactions
作者:Sharmila Pandey、Tanmoy Mandal
DOI:10.1002/ejic.202100103
日期:2021.5.14
Two copper(II) complexes with benzotriazole‐based ligands having pyridyl and quinolinyl arms were synthesized in good yields and characterized fully via spectroscopic and crystallographic techniques. The crystalstructures of the complexes revealed different coordination environments around copper(II) centers. The difference in structure was due to the steric effect of the ligands, which resulted in
bacteria and pathogenic fungi at MIC range 3 x 10(-2) to 2.5 x 10(-1) mumol/mL, displayed cytotoxicity against KB cells ID50 in the range 2 x 10(-3) to 9 x 10(-3) mumol/mL, and stimulated the formation of calf thymus topoisomerase II mediated DNA cleavage at concentration between 0.4 and 10 microM. None of the indolo[2,3-b]quinolines belonging to the 6H series, i.e., lacking a methyl group on the pyridine
为了进一步开展有关稠合氮杂芳族化合物的化学和抗肿瘤活性的SAR研究,根据修饰的Graebe-合成了一系列5H-和6H-吲哚并[2,3-b]喹啉的线性,甲基取代的衍生物。乌尔曼反应。为了建立吲哚[2,3-b]喹啉的理化和生物学活性之间的关系,它们的亲脂性,细胞毒性和抗菌活性以及在体外诱导拓扑异构酶II依赖性pSP65 DNA裂解的能力,我们进行了研究。我们发现吲哚[2,3-b]喹啉的抗微生物和细胞毒性活性受到位置的强烈影响,甲基取代基的数量和吡啶氮上甲基的存在对于这些化合物的细胞毒性至关重要。全部indolo [2,属于5H系列的3-b]喹啉,即在吡啶氮上带有甲基,对原核和真核生物显示出显着的活性。它们在MIC范围3 x 10(-2)至2.5 x 10(-1)mumol / mL时抑制革兰氏阳性细菌和致病真菌的生长,对KB细胞ID50的细胞毒性显示在2 x 10(-3)范围内至9 x 10(-3)mumol