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。