Inhibition of cellular proliferation and induction of apoptosis in human lung adenocarcinoma A549 cells by T-type calcium channel antagonist
摘要:
The anti-proliferative and apoptotic activities of new T-type calcium channel antagonist, 6e (BK10040) on human lung adenocarcinoma A549 cells were investigated. The MTT assay results indicated that BK10040 was cytotoxic against human lung adenocarcinoma (A549) and pancreatic cancer (MiaPaCa2) cells in a dose-dependent manner with IC50 of 2.25 and 0.93 mu M, respectively, which is ca. 2-fold more potent than lead compound KYS05090 despite of its decreased T-type calcium channel blockade. As a mode of action for cytotoxic effect of BK10040 on lung cancer (A549) cells, this cancer cell death was found to have the typical features of apoptosis, as evidenced by the accumulation of positive cells for annexin V. In addition, BK10040 triggered the activations of caspases 3 and 9, and the cleavages of poly (ADP-ribose) polymerase (PARP). Moreover, the treatment with z-VAD-fmk (a broad spectrum caspase inhibitor) significantly prevented BK10040-induced apoptosis. Based on these results, BK10040 may be used as a potential therapeutic agent for human lung cancer via the potent apoptotic activity. (C) 2014 Elsevier Ltd. All rights reserved.
synthesis of 2‐vinylanilines from the reaction of arylhydrazine hydrochlorides with alkenes and diethyl ketone via a rhodium‐catalyzed CHactivation is described. The oxidant‐free olefination reaction involves the in situ generation of an NNCR1R2 moiety as the oxidizingdirecting group thus providing an easy access to 2‐vinylanilines.
Visible‐Light‐Driven Isocyanide Insertion to
<i>o</i>
‐Alkenylanilines: A Route to Isoindolinone Synthesis
作者:Anjali Dahiya、Bubul Das、Ashish Kumar Sahoo、Bhisma K. Patel
DOI:10.1002/adsc.202101431
日期:2022.3
intermolecular radical insertion of isocyanides to electron-deficient o-alkenylanilines leading to isoindolinone is reported. Deuterium (D2O) and H2O18 labelling experiments suggest H and O incorporation in the product. The formation of an N-centered radical (NCR) via stepwise PT/ET process was confirmed by radical trapping experiments, photoluminescence, cyclic voltammetry and DFT studies. This photo cascade methodology
报道了可见光介导的异氰化物分子间自由基插入到缺电子的o-烯基苯胺,导致异吲哚啉酮。氘 (D 2 O) 和 H 2 O 18标记实验表明产品中含有 H 和 O。通过自由基捕获实验、光致发光、循环伏安法和 DFT 研究证实了通过逐步 PT/ET 过程形成N中心自由基 (NCR) 。这种光级联方法总体上是一种氧化还原中性工艺,具有无金属条件和广泛的基材范围(32 个示例)。GABA 受体拮抗剂类似物的合成显示了该方法的实用性。
Transformable Transient Directing Group-Assisted C(sp<sup>2</sup>)–H Activation: Synthesis and Late-Stage Functionalizations of <i>o</i>-Alkenylanilines
作者:Bubul Das、Anjali Dahiya、Ashish Kumar Sahoo、Bhisma K. Patel
DOI:10.1021/acs.joc.2c01626
日期:2022.10.7
The isocyanate group in aryl isocyanates serves as a transformable transientdirectinggroup in a Ru(II)-catalyzed ortho olefination leading to o-alkenylanilines. In alcoholic solvents, aryl isocyanates are transformed into carbamates, which initiate the insertion of acrylates via o-C–H activation. In particular, tAmOH serves the dual role of solvent-cum transientdirecting mediator. The o-alkenylanilines