Eight new gold(III) complexes (1–8) of 5-aryl-3-(pyridin-2-yl)-4,5-dihydropyrazole-1-carbothioamide have been synthesized and characterized by elemental analysis, molar conductivity, IR, UV, 1H NMR, 13C NMR, MS, and thermal analysis techniques. The cytotoxicity was tested by MTT assay. The results indicate that the complexes 1–8 exert cytotoxic effects against HeLa and A549 cell lines. Moreover, the
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。
Highly enantioselective synthesis of naphthoquinones and pyranonaphthoquinones catalyzed by bifunctional chiral bis-squaramides
作者:Nagaraju Molleti、Vinod K. Singh
DOI:10.1039/c5ob00105f
日期:——
bis-squaramide catalyzed conjugate addition of 2-hydroxy-1,4-naphthoquinone to 2-enoylpyridines. Some of the Michael products have been successfully converted into various enantioenriched pyranonaphthoquinone derivatives. The protocol is further extended to the synthesis of various 4-hydroxycoumarinderivatives under mild conditions.
Bifunctional chiral urea catalyzed highly enantioselective Michael addition of cyclic 1,3-dicarbonyl compounds to 2-enoylpyridines
作者:Nagaraju Molleti、Suresh Allu、Sumit K. Ray、Vinod K. Singh
DOI:10.1016/j.tetlet.2013.04.003
日期:2013.6
A highly efficient cinchona alkaloid based bifunctional urea catalyzed enantioselective conjugate addition of cyclic 1,3-dicarbonylcompounds to a range of β-substituted 2-enoylpyridines has been developed. Chiral 2,4-diaryl substituted 1,4-dihydropyridines could easily be accessible from these Michael adducts. Significantly, this asymmetric methodology could afford both enantiomers of the products