Synthesis and evaluation of indole-containing 3,5-diarylisoxazoles as potential pro-apoptotic antitumour agents
摘要:
A series of novel indole-containing diarylisoxazoles has been synthesised, based on our previous work on the synthesis and pro-apoptotic antitumour activity of indole-based diaryl 1,2,4-oxadiazoles. Concise synthetic routes to both 3-(indol-2-yl)-5-phenylisoxazoles and 5-(indol-2-yl)-3-phenylisoxazoles have been developed with full regiochemical control, bearing substituents on the indole ring, indole nitrogen, and/or phenyl group. Additionally a series of the related 5-(1H-indol-5-yl)-3-phenylisoxazoles has been prepared. In vitro evaluation in human cancer cell lines Colo320 (colon) and Calu-3 (lung) revealed preferential antiproliferative activity within the 5-(indol-5-yl)-3-phenylisoxazole series (low micromolar IC50). Further analysis revealed the ability of the indol-5-yl series to induce expression of effector caspases-3 and -7, and retention of viability of the human bronchial smooth muscle cell (BSMC) control cell population (particularly for compounds 18c and 18e). (C) 2012 Elsevier Masson SAS. All rights reserved.
Selective Synthesis of Pyrano[3,2-<i>b</i>]indoles or Cyclopenta[<i>b</i>]indoles Tethered with Medium-Sized Rings via Cascade C–C σ-Bond Cleavage and C–H Functionalization
作者:Mengdan Wang、Yajie Yang、Liqiang Yin、Ye Feng、Yanzhong Li
DOI:10.1021/acs.joc.0c02310
日期:2021.1.1
atom-economical tandem reactions have been developed for the synthesis of pyrano[3,2-b]indoles or cyclopenta[b]indoles tethered with 7-, 8-, or 9-membered rings. These reactions first undergo a carbon–carbon σ-bond cleavage reaction of cyclic β-ketoesters. Next, in the presence of CuCl2 and Ag2CO3, intramolecular O–H/C–H coupling occurs to give pyrano[3,2-b]indoles. This is the first example for capture of the enoloxyl
已经开发出高度原子经济的串联反应,用于合成与7、8或9元环连接的吡喃并[3,2- b ]吲哚或环戊[ b ]吲哚。这些反应首先经历环状β-酮酸酯的碳-碳σ键裂解反应。接下来,在CuCl 2和Ag 2 CO 3的存在下,发生分子内O–H / C–H偶联,生成吡喃并[3,2- b ]吲哚。这是捕获分子内C–O键形成反应的烯氧基自由基的第一个例子,而C3亲核加成反应使用TsOH·H 2 O提供了环戊[ b ]吲哚。
Controllable synthesis of pyrido[2,3-<i>b</i>]indol-4-ones or indolo[3,2-<i>b</i>]quinolines <i>via</i> formal intramolecular C(sp<sup>2</sup>)–H functionalization
作者:Bo Song、Mengdan Wang、Murong Xu、Lingkai Kong、Huihui Xie、Chengyu Wang、Yanzhong Li
DOI:10.1039/c9ob02108f
日期:——
controllable synthesis of pyrido[2,3-b]indol-4-ones or indolo[3,2-b]quinolines has been developed by using indole-2-carboxylic derivatives as starting materials. Indole-2-carboxenamines were transformed into pyrido[2,3-b]indol-4-ones through intramolecular N–H/C–H coupling, in which a carbonyl 1,2-migration was involved. Whereas, when indole-2-carboxarylamines were employed, indolo[3,2-b]quinolones were
以吲哚-2-羧酸衍生物为原料,开发了一种新型的铁催化可控合成吡啶并[2,3 - b ]吲哚-4-酮或吲哚[3,2- b ]喹啉的方法。吲哚-2-羧胺通过分子内N–H / C–H偶联转变为吡啶[2,3- b ]吲哚-4-酮,其中涉及羰基1,2-迁移。而当使用吲哚-2-羧芳基胺时,吲哚[3,2- b ]喹诺酮是通过直接的NH / CH偶联而产生的。在温和的反应条件下以中等至良好的收率在宽范围的底物范围内获得所需产物。通过该反应可方便地制备天然产物喹啉啉酮。
Merging base-promoted C–C bond cleavage and iron-catalyzed skeletal rearrangement involving C–C/C–H bond activation: synthesis of highly functionalized carbazoles
作者:Lingkai Kong、Mengdan Wang、Ye Wang、Bo Song、Yajie Yang、Qiyi Yao、Yanzhong Li
DOI:10.1039/c8cc06074f
日期:——
An efficient and atom-economical methodology for the synthesis of multi-substituted carbazoles starting from α-aryl ketones and ynones undermild reaction conditions has been developed. This process goes through Cs2CO3 promoted C–C σ-bond activation of α-aryl ketones followed by highly selective C–H bond activations and C–C bond fragmentations in a one-pot operation.
已经开发了一种在温和的反应条件下从α-芳基酮和炔酮开始合成多取代咔唑的有效且经济的方法。这一过程经历了通过Cs 2 CO 3促进α-芳基酮的C–Cσ键活化,然后以一锅操作进行高度选择性的C–H键活化和C–C键断裂的过程。