Design, synthesis, biological evaluation of 3,5-diaryl-4,5-dihydro-1H-pyrazole carbaldehydes as non-purine xanthine oxidase inhibitors: Tracing the anticancer mechanism via xanthine oxidase inhibition
作者:Gaurav Joshi、Manisha Sharma、Sourav Kalra、Navnath S. Gavande、Sandeep Singh、Raj Kumar
DOI:10.1016/j.bioorg.2020.104620
日期:2021.2
(2a-2x) as xanthineoxidaseinhibitors (XOIs). A docking model was developed for the prediction of XO inhibitory activity of our novel compounds. Furthermore, our compounds anticancer activity results in low XO expression and XO-harboring cancer cells both in 2D and 3D-culture models are presented and discussed. Among the array of synthesized compounds, 2b and 2m emerged as potent XO inhibitors having
黄嘌呤氧化酶 (XO) 主要用于开发抗高尿酸血症/抗痛风剂,因为它催化黄嘌呤和次黄嘌呤转化为尿酸。由于催化过程中活性氧 (ROS) 的产生和致癌物质的代谢活化,XO 在各种癌症中的过度表达非常相关。在此,我们报告了一系列 3,5-二芳基-4,5-二氢-1 H-吡唑甲醛衍生物 ( 2a - 2x) 作为黄嘌呤氧化酶抑制剂 (XOI)。开发了一种对接模型,用于预测我们的新型化合物的 XO 抑制活性。此外,我们的化合物抗癌活性导致 2D 和 3D 培养模型中的低 XO 表达和 XO 携带癌细胞。合成的化合物的阵列中,图2b和2米成为具有IC强效抑制剂XO 50值分别为 9.32 ± 0.45 µM 和 10.03 ± 0.43 µM。这两种化合物均诱导细胞凋亡,在 G1 期停止细胞周期进程,提高 ROS 水平,改变线粒体膜电位,并抑制抗氧化酶。由于我们的化合物诱导的氧化应激增加,细胞中 miRNA
Entry to 1,2,3,4-Tetrasubstituted Arenes through Addressing the “<i>Meta</i> Constraint” in the Palladium/Norbornene Catalysis
methods. Through addressing the "meta constraint" in the palladium/norbornene (Pd/NBE) cooperative catalysis, which is the difficulty of tolerating a sizable meta substituent in aryl halide substrates, here a modular and regioselective approach is realized for preparing 1,2,3,4-tetrasubstituted arenes. One key is the use of a C2-amide-substituted NBE, and a combinedexperimental and computational study
The reaction of acetophenones with iodine(III) tris(trifluoroacetate) yields 3′- and/or 2-iodo derivatives, depending upon the substituent on the aromatic ring and the reaction conditions. The reaction was examined by changing the molar ratio of acetophenone versus the reagent, reaction temperature, and solvent. In similar reactions flavanones and coumarins gave iodo derivatives in which iodine is incorporated
Sonogashira coupling reactions in biodegradable ionic liquids derived from nicotinic acid
作者:Jitendra R. Harjani、Theodore J. Abraham、Alwyn T. Gomez、M. Teresa Garcia、Robert D. Singer、Peter J. Scammells
DOI:10.1039/b919394d
日期:——
The biodegradable ionic liquids, 3-butoxycarbonyl-1-methylpyridinium bis(trifluoromethanesulfonyl)imides (1a–d), have been evaluated as solvents for copper- and phosphine-free Sonogashiracoupling reactions. The stability of these ionic liquids toward basic conditions was analysed in order to further probe their utility for transition metal catalyzed reactions which require the presence of a base.
An exclusive approach to 3,4-disubstituted cyclopentenes and alkylidene cyclopentenes via the palladium catalyzed ring opening of azabicyclic olefins with aryl halides
作者:Nayana Joseph、Rani Rajan、Jubi John、N. V. Devika、S. Sarath Chand、E. Suresh、Petri M. Pihko、K. V. Radhakrishnan
DOI:10.1039/c3ra41504j
日期:——
A simple and efficient method for the stereoselective ringopening of bicyclic hydrazines with various aryl halides under palladium catalysis has been elaborated. The reactions afforded trans-3,4-disubstituted cyclopentenes or alkylidene cyclopentenes in good to excellent yields. By taking advantage of multiple points of functionalization in the synthesized trans-3-phenyl-4-hydrazino-cyclopentene,