A general and efficient Pd-catalyzed rapid 2-fluoroethoxylation of bromo-chalcones
摘要:
An efficient unprecedented Pd-catalyzed rapid 2-fluoroethoxylation of bromo-chalcones has been unveiled. The oxygen nucleophiles (fluoroalcohols) experience the rapid C-O bond forming reaction for the first time, albeit the alcohols are known to be a weak nucleophile and have greater competing beta-hydride elimination in the transition-metal-catalyzed (especially Pd and Cu) C-O cross-coupling reaction. The higher fluoroalcohols have also been effectively coupled with bromo-chalcones with relatively lower rate. (C) 2016 Elsevier B.V. All rights reserved.
A general, mild and efficient palladium-catalyzed 2,2,2-trifluoroethoxylation of activated aryl bromides and bromo-chalcones: bromo-chalcones a new coupling partner in cross-coupling reaction
作者:T.M. Rangarajan、Kavita Devi、Ayushee、Ashok K. Prasad、Rishi Pal Singh
DOI:10.1016/j.tet.2015.08.071
日期:2015.10
2-trifluoroethoxylation of activated aryl bromides and bromo-chalcones has been developed. We unveil a fascinating insight into the Pd-catalyzed C–O cross-coupling reaction. Pd/tBuXPhos (L1) ligand system facilitates the C–O cross-coupling reaction between 2,2,2-trifluoroethanol and activated aryl bromides at both higher (115 °C) and lower temperatures (40 °C). Unprecedentedly, this catalyst system facilitates the
Synthesis and Structure-activity Relationships of Chalcone Derivatives as Inhibitors of Ovarian Cancer Cell Growth
作者:Zachary D. Tucker、Francis J. Barrios、Amanda J. Krzysiak
DOI:10.2174/1570180814666170505120258
日期:2017.10.3
proliferation of CA-OV3 cells was measured with a MTS assay. Results: Out of the thirty-four synthesized compounds, eight are newderivatives. The synthesized compounds were characterized by 1H NMR, 13C NMR, and HRMS. Biological evaluation of these β-phenylacrylophenone derivatives in CA-OV3 cells showed interesting antiproliferative activities providing initial structure – activity information. Conclusion:
背景:卵巢癌仍然是一种五年生存率很低的疾病。因此,需要新颖的疗法。天然查耳酮及其合成衍生物已在包括抑制癌细胞生长在内的许多领域显示出生物活性。 目的:建立查尔酮衍生物文库,包括新颖的结构,并确定其对卵巢癌细胞生长的抑制作用及其与结构-活性的关系。 方法:用取代的苯乙酮与芳族醛之间的Claisen-Schmidt缩合反应,以中等至极好的收率和良好的纯度生产了一系列新型查耳酮。用MTS测定法测量CA-OV3细胞的细胞增殖。 结果:在34种合成化合物中,有8种是新衍生物。合成的化合物通过1 H NMR,13 C NMR和HRMS进行表征。在CA-OV3细胞中对这些β-苯基丙烯酮衍生物进行的生物学评估显示出有趣的抗增殖活性,提供了初始结构-活性信息。 结论:在34种测试的化合物中,有14种显示出显着的活性,其中一些显示在100 µM时几乎完全抑制了生长。结构-活性关系表明,对A环的修饰是宽容的,对
Inhibitory potential of some chalcones on cathepsins B, H and L
作者:Shweta Garg、Neera Raghav
DOI:10.1039/c5ra12856k
日期:——
Cathepsins, intracellular proteases, are known to be involved in a number of physiological processes such as degradation of extracellular proteins, prohormone processing, progressions of atherosclerosis etc.
卡特普辛是细胞内蛋白酶,已知参与多种生理过程,如降解细胞外蛋白、前激素加工、动脉粥样硬化进展等。
197. Chalcones and related compounds. Part II. Addition of thiols and esters to the chalcone system
作者:W. Davey、J. R. Gwilt
DOI:10.1039/jr9570001015
日期:——
Iimura, Nippon Kagaku Zasshi, 1956, vol. 77, p. 1846,1847