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。
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
Synthesis and Characterization of Ru(II)–DMSO–Cl–Chalcone Complexes: DNA Binding, Nuclease, and Topoisomerase II Inhibitory Activity
作者:Ruchi Gaur、Lallan Mishra
DOI:10.1021/ic202440r
日期:2012.3.5
The complexes of type cis-[Ru(S-DMSO)(3)(R-CO-CH=CH-R')Cl] (R = 2-hydroxyphenyl for all, R' = phenyl 1, naphthyl 2, anthracenyl 3, thiophene 4, 3-methyl thiophene 5) are synthesized and characterized using spectroscopic (IR, H-1 and C-13 NMR, and UV-vis) and single crystal X-ray diffraction techniques. Their crystal structures show the formation of both intermolecular and intramolecular H-bonding. The molecular assembly of complex 5 using secondary interactions provides a butterfly structure. The binding of complexes with calf thymus DNA is monitored using UV-vis spectral titrations. The binding interaction of complexes 1, 2, and 3 with DNA increases with increasing conjugation of aromatic rings. However, complexes 4 and 5 interact with DNA strongly. The emission from ethidium bromide (EB) bound DNA recorded in phosphate buffer solution (pH = 7.2) decreases by incremental addition of solution of the complexes. The complexes 4 and 5 (100 mu M) bind with the minor groove of DNA and cleave double-stranded pBR322 DNA significantly even in the absence of an activator. In the presence of H2O2, they cleave supercoiled DNA via oxidative pathway even at lower concentration (20 mu M). Both complexes 4 and 5 inhibit topoisomerase II activity with IC50 values of 18 and 13. These values suggest that 4 and 5 are potential topoisomerase II inhibitors as compared to some of known inhibitors like novobiocin and etoposide.
Solvent-controlled difluoromethylation of 2′-hydroxychalcones for divergent synthesis of 2′-difluoromethoxychalcones and 2,2-difluoro-3-styryl-2,3-dihydrobenzofuran-3-ols
The solvent-controlled difluoromethylation of 2'-hydroxychalcones using the shelf-stable reagent difluoromethylene phosphabetaine for divergent synthesis of 2'-difluoromethoxychalcones and 2,2-difluoro-3-styryl-2,3-dihydrobenzofuran-3-ols is developed. When difluoromethylation was performed in p-xylene, 2'-difluoromethoxychalcones were the major product with 47-97% yields, while 2,2-difluoro-3-styry1-2,3-dihydrobenzofuran-3-ols were obtained in 21-75% yields using acetonitrile as solvent. A plausible reaction mechanism was proposed according to the experimental results. (C) 2015 Published by Elsevier B.V.