In this study, we reported the synthesis and biological characterization of a novel series of furan-carboxamide derivatives that were potent inhibitors of the influenza A H5N1 virus. The systematic structure–activity relationship (SAR) studies demonstrated that the 2,5-dimethyl-substituted heterocyclic moiety (furan or thiophene) had significant influence on the anti-influenza activity. In particular
Synthesis and biological activities of novel trifluoromethylpyridine amide derivatives containing sulfur moieties
作者:S. X. Guo、F. He、A. L. Dai、R. F. Zhang、S. H. Chen、J. Wu
DOI:10.1039/d0ra07301f
日期:——
A series of trifluoromethylpyridine amide derivativescontaining sulfur moieties (thioether, sulfone and sulfoxide) was designed and synthesized. Their antibacterial activities against Xanthomonas oryzae pv. oryzae (Xoo), Ralstonia solanacearum (R. solanacearum) and insecticidal activities against P. xylostella were evaluated. Notably, the half-maximal effective concentration (EC50) value of sulfone-containing
设计并合成了一系列含硫基团(硫醚、砜和亚砜)的三氟甲基吡啶酰胺衍生物。它们对米黄单胞菌(Xanthomonas oryzae pv. ) 的抗菌活性。评估了米曲霉( Xoo )、青枯雷尔斯顿菌( R. solanacearum ) 和针对小菜蛾的杀虫活性。值得注意的是,含砜化合物F10相对于Xoo的半最大有效浓度(EC 50 )值为83 mg L -1,优于商业噻二唑铜(97 mg L -1)和双噻唑(112 mg L -1 ) 。 −1 )。含硫醚化合物E1、E3、E5、E6、E10、E11和E13对青枯菌表现出更高的活性,EC 50值为40至78 mg L -1,远低于噻二唑铜(87 mg L -1)和双噻唑(124 mg L -1)。一般来说,大多数含砜化合物和含亚砜化合物对Xoo表现出比相应的含硫醚化合物更高的活性,但大多数含硫醚化合物对青枯菌具有更高的抗菌活性。此外,标题化合物E
Enantioselective Synthesis of <i>N</i>
,<i>S</i>
-Acetals by an Oxidative Pummerer-Type Transformation using Phase-Transfer Catalysis
作者:Souvagya Biswas、Koji Kubota、Manuel Orlandi、Mathias Turberg、Dillon H. Miles、Matthew S. Sigman、F. Dean Toste
DOI:10.1002/anie.201711277
日期:2018.1.8
Deuterium‐labelling experiments were performed to identify the stereodiscrimination step of this process. Further analysis of the reaction transition states, by means of multidimensional correlations and DFT calculations, highlight the existence of a set of weak noncovalent interactions between the catalyst and substrate that govern the enantioselectivity of the reaction.