八个新金(III)络合物(1 - 8)的5-芳基-3-(吡啶-2-基)-4,5-二氢吡唑-1-硫代甲酰胺的已经合成和表征通过元素分析,摩尔电导率,IR, UV,1 H NMR,13 C NMR,MS和热分析技术。通过MTT测定法测试细胞毒性。结果表明,复合物1 – 8对HeLa和A549细胞株具有细胞毒作用。此外,复合物1,4,5,7和8与顺铂相比,对HeLa细胞系具有更高的细胞毒性。这表明苯上的取代基对细胞毒性具有重要影响。
N-Heterocyclic carbene-catalyzed diastereoselective synthesis of β-lactone-fused cyclopentanes using homoenolate annulation reaction
作者:Subrata Mukherjee、Santigopal Mondal、Atanu Patra、Rajesh G. Gonnade、Akkattu T. Biju
DOI:10.1039/c5cc02960k
日期:——
NHC-catalyzed annulation of enals with 2-enoylpyridines or 2-enoylpyridine N-oxides leading to the diastereoselective synthesis of [small beta]-lactone-fused cyclopentanes is reported. The reaction proceeds via the generation of homoenolate equivalent intermediates and...
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。
Enantioselective La<sup>III</sup>-pyBOX-Catalyzed Nitro-Michael Addition to (<i>E</i>)-2-Azachalcones
作者:Gonzalo Blay、Celia Incerti、M. Carmen Muñoz、José R. Pedro
DOI:10.1002/ejoc.201201579
日期:2013.3
[La(OTf)3] complex with a new pyBOX ligand bearing a bulky 1-naphthylmethyl substituent at the 4′-position of the oxazoline ring catalyzes the conjugate addition of nitroalkanes to a broad range of (E)-2-azachalcones, providing the expected nitro-Michael products with good yields and enantiomeric excesses up to 87 %. The optical purity of the products can be increased by a single crystallization. A plausible
Temperature dependence of the crystal structure and luminescence properties of [Pt{4′-(o-ClC6H4)trpy}Cl]SbF6 (trpy = 2,2′:6′,2″-terpyridine)Electronic supplementary information (ESI) available: Fig. S1: Unit cell contents of [Pt{4′-(o-ClC6H4)trpy}Cl]SbF6 viewed down the [a]-axis and Fig. S2: View of the cation stack in [Pt{4′-(o-ClC6H4)trpy}Cl]SbF6. See http://www.rsc.org/suppdata/dt/b2/b209754k/
作者:John S. Field、Jan-Andre Gertenbach、Raymond J. Haines、Lesibana P. Ledwaba、Ndoda T. Mashapa、David R. McMillin、Orde Q. Munro、Grant C. Summerton
DOI:10.1039/b209754k
日期:2003.3.12
[Pt4′-(o-ClC6H4)trpy}Cl]SbF6 are described. An X-ray crystal structure determination of the salt reveals columns of cations and anions with the cations stacked parallel and head-to-tail. At 295 K the Pt⋯Pt distances alternate between 3.374(1) and 3.513(1) Å while the perpendicular separation between the mean planes comprising the platinum and three bonded nitrogen atoms remains constant at 3.35 Å. As evidenced by
Reinvestigation of synthesis of halo-substituted 3-phenyl-1-(2-pyridyl)-2-propen-1-ones (azachalcones). A tandem reaction for formation of penta-substituted cyclohexanols
作者:Chia-Wai Li、Tzu-Hsuan Shen、Tzenge-Lien Shih
DOI:10.1016/j.tet.2017.06.033
日期:2017.8
During the reaction course, we obtained not only the target azachalcones, but also penta-substituted cyclohexanols, which are seldom reported in the literatures. The formation of penta-substituted cyclohexanols was dependent on equivalents of base used and reaction time. Their formation followed a tandem reaction: Claisen-Schmidt condensation, three Michael reactions, retro-aldol reaction, and intramolecular