按照克莱森-施密特的方法,一步合成了一系列新的3-羟基黄酮(1-46),然后进行了阿尔加-弗林-奥马达达反应(AFO)。合成的类黄酮通过1 H NMR,13 C NMR和DCI-HRMS进行表征。在体外测试所有合成的化合物对人细胞系HCT-116(人类结肠癌),IGROV-1和OVCAR-3(人类卵巢癌)的15-脂氧合酶抑制作用和细胞毒活性。已经发现,衍生物25、37和45对HCT-116(分别为IC50 = 8.0、9.0和9.0μM)和对IGROV-1(分别为IC50 = 2.4、5.0和6.0μM)最具活性。衍生物14和21在100μM下表现出更高的抗炎活性,PI值分别为76.50和72.70%。分子描述是通过DFT计算完成的,药物相似性和生物活性分数。结果表明,某些化合物与Lipinski的五个规则线性相关,显示出良好的药物相似性和针对药物靶标的生物活性得分。
Water-mediated phosphorylative cyclodehydrogenation: An efficient preparation of flavones and flavanones
作者:Manorama Vimal、Uma Pathak、Anand Kumar Halve
DOI:10.1080/00397911.2019.1643484
日期:——
for the conversion of 2′-hydroxychalcones to flavanones and flavones has been developed. The reagent efficiently promoted one-pot conversion of 2′-hydroxychalcones to flavones through flavanones involving cyclization and oxidative dehydrogenation. By changing the stoichiometery of the reagents, the reaction can be tuned to generate either flavanone or flavone. The developed protocol was found to be applicable
Fe(HSO<sub>4</sub> )<sub>3</sub> /SiO<sub>2</sub>: an efficient and heterogeneous catalyst for one-pot synthesis of 2-aryl-chromene-4-ones (flavanones)
synthesis of flavanones from 2-hydroxyacethophenone and aldehydes in the presence of Fe(HSO4)3/SiO2. Flavanones were prepared in high yields in a new catalytic system with similar substitutedeffect in the indirect cyclisationmethod. The catalyst in all the above reactions is reusable without significant decreases in its activity after four times of recycling.
Selective synthesis of multifunctionalized cyclopent-3-ene-1-carboxamides and 2-oxabicyclo[2.2.1]heptane derivatives
作者:Hui Zheng、Ying Han、Feng-Shun Xu、Jing Sun、Chao-Guo Yan
DOI:10.1039/d2nj03198a
日期:——
and with high diastereoselectivity. More importantly, the similar reaction of phenacylmalononitriles and chalcone o-enolates in ethanol at room temperature afforded functionalized 2-oxabicyclo[2.2.1]heptane derivatives in satisfactory yields and with high diastereoselectivity. A rational domino reaction was tentatively proposed to explain the selective formation of different cyclic compounds and the
CAN Interceded Oxidative Coupling of β‐Dicarbonyl Compounds to 2‐Aryl/Heteroarylchromenes: A Regio‐ and Diastereoselective Synthesis of Tetrahydro‐benzofuro[3,2‐<i>c</i>]chromenones
A CAN mediated oxidative coupling of 1,3-dicarbonyl compounds to 2-arylchromenes followed by cyclization affords tetrahydro-benzofuro[3,2-c]chromenones with regio- and diastereoselectivity in high yield.
CAN 介导的 1,3-二羰基化合物与 2-芳基色烯的氧化偶联,然后环化,以高产率提供具有区域和非对映选择性的四氢苯并呋喃并[3,2- c ]色烯酮。
Hydromagnesite as an Efficient Recyclable Heterogeneous Solid Base Catalyst for the Synthesis of Flavanones, Flavonols and 1,4-Dihydropyridines in Water
作者:U. Chinna Rajesh、Sunny Manohar、Diwan S. Rawat
DOI:10.1002/adsc.201300555
日期:2013.11.11
AbstractA form of hydromagnesite (HM) with flower‐like thin‐sheet morphology was synthesized by an environmentally benign approach using simple conventional heating at moderate temperature without using any template in water as medium. The versatility of this HM catalyst was studied in the synthesis of flavanones, flavonols and the multicomponent synthesis of 1,4‐dihydropyridines in water. The recyclability of catalyst was studied for six times and there was no appreciable loss in its catalytic activity.magnified image