Synthesis and β-glucuronidase inhibitory activity of 2-arylquinazolin-4(3H)-ones
作者:Khalid Mohammed Khan、Syed Muhammad Saad、Nimra Naveed Shaikh、Shafqat Hussain、Muhammad Imran Fakhri、Shahnaz Perveen、Muhammad Taha、Muhammad Iqbal Choudhary
DOI:10.1016/j.bmc.2014.04.039
日期:2014.7
2-Arylquinazolin-4(3H)-ones 1–25 were synthesized by reacting anthranilamide with various benzaldehydes using CuCl2·2H2O as a catalyst in ethanol under reflux. Synthetic 2-arylquinazolin-4(3H)-ones 1–25 were evaluated for their β-glucuronidase inhibitory potential. A trend of inhibition IC50 against the enzyme in the range of 0.6–198.2 μM, was observed and compared with the standard d-saccharic acid
Antioxidant and ROS Inhibitory Activities of Heterocyclic 2-Aryl-4(3H)-quinazolinone Derivatives
作者:Shahida Perveen、Syed Muhammad Saad、Khalid Mohammed Khan、Muhammad Iqbal Choudhary
DOI:10.2174/1570180818666210427092319
日期:2021.8
Most of the 2-aryl-4(3H)-quinazolinone derivatives showed potent antioxidant activities in superoxide anion radical scavenging assay with IC50 value ranging between 0.57 μM - 48.93 μM, as compared to positive control quercetin dihydrate (IC50 = 94.1 ± 1.1 μM ). Compounds 5, 6, and 14 showed excellent activity in DPPH assay. Compounds 5-8, 12-15, 17, and 20 showed promising activities in the ROS inhibition
and pyrido[2,3-d]pyrimidin-4(3H)-ones from easily available 2-halobenzamides (or 2-halonicotinamides), aldehydes, and sodium azide has been developed, which gave the corresponding target products in 50–95% yields for 29 examples. This remarkable consecutive process involved sequential copper-catalyzed SNAr, reduction, cyclization, and oxidation. Notably, this work would provide a novel synthetic strategy
从容易获得的2-卤代苯甲酰胺(或2-卤代烟酰胺)中高效,实用地铜催化连续合成喹唑啉-4(3 H)-酮和吡啶并[2,3 - d ]嘧啶-4(3 H)-酮,已开发出醛和叠氮化钠,从而使29个实例的相应目标产物收率达到50-95%。这个非同寻常的连续过程涉及连续的铜催化的S N Ar,还原,环化和氧化。值得注意的是,这项工作将为含有喹唑啉酮类骨架的生物活性分子提供一种新颖的合成策略。
Yttrium nitrate catalyzed synthesis, photophysical study, and TD-DFT calculation of 2,3-dihydroquinazolin-4(1H)-ones
作者:Abdul Ashik Khan、Kanchan Mitra、Abhijit Mandal、Nabajyoti Baildya、Mohabul A. Mondal
DOI:10.1002/hc.21379
日期:2017.7
AbstractWe have developed an efficient method of the synthesis of 2,3‐dihydroquinazolin‐4(1H)‐one (DHQ) using yttrium nitrate catalyst at room temperature. The synthetic method is simple, convenient, and easy product isolation. Best results obtained in CH3CN, DMF, or water. The synthesized DHQ derivatives are found to be good fluorophores, and their characteristic photoluminescence properties are measured. Absorption and emission spectra of DHQ derivatives were recorded in CH3CN. Calculated emission and absorption bands are in excellent agreement with experimentally observed values.