氧化应激不断参与范围不断扩大的神经退行性疾病的发病机制。因此,将细胞氧化应激有效抑制为氧化还原稳态是治疗或至少延缓此类疾病进展的有希望且可行的策略。Nrf2的,细胞抗氧化反应机的主协调器,负责解毒和补偿有害氧化应激通过多种抗氧化生物分子的转录激活。在我们对披露干扰细胞氧化还原调节机制的小分子的持续兴趣的框架内,我们在此报告了 47 种带有乙烯基砜支架的小分子的合成、优化和生物学评估,所有这些都对 H 表现出强大的神经保护作用2 O 2介导的PC12细胞损伤。经过初步筛选,最有效的神经保护化合物9b和9c选择具有边缘细胞毒性的细胞进行后续研究。我们的结果表明,它们的神经保护作用归因于一组抗氧化基因和相应基因产物的上调。进一步的机制研究表明,Nrf2 对9b和9c的细胞性能是必不可少的,这是由于 Nrf2 基因的沉默大大抵消了它们的保护作用。总之,在这项工作中发现的9b和9c值得进一步开发,作
Electrosynthesis of (<i>E</i>)-Vinyl Sulfones Directly from Cinnamic Acids and Sodium Sulfinates via Decarboxylative Sulfono Functionalization
作者:Peng Qian、Meixiang Bi、Jihu Su、Zhenggen Zha、Zhiyong Wang
DOI:10.1021/acs.joc.6b00661
日期:2016.6.3
A variety of (E)-vinyl sulfones were constructed directly from cinnamic acids and sodium sulfinates with high regioselectivity at room temperature by virtue of an electrocatalytic oxidation. A radical intermediate was detected, and the corresponding mechanism was investigated.
<i>E</i>-Selective synthesis of vinyl sulfones <i>via</i> silver-catalyzed sulfonylation of styrenes
作者:Qingwen Gui、Kang Han、Zhuoliang Liu、Zhaohong Su、Xiaoli He、Hongmei Jiang、Bufan Tian、Yangyan Li
DOI:10.1039/c8ob01502c
日期:——
An efficient and highly E-selective protocol for the synthesis of vinyl sulfones is described. This simple protocol demonstrates the first synthesis of vinyl sulfonesvia a silver-catalyzed C–S bond coupling reaction. In addition, the success of the reaction was found to be critically dependent on the use of TEMPO as the additive.
Visible-light-induced decarboxylative sulfonylation of cinnamic acids with sodium sulfinates by using Merrifield resin supported Rose Bengal as a catalyst
作者:Pinhua Li、Guan-Wu Wang
DOI:10.1039/c9ob00790c
日期:——
decarboxylative sulfonylation of cinnamic acids with sodium sulfinates for the synthesis of vinyl sulfones was developed. The reaction proceeded smoothly in the presence of Merrifield resin supported Rose Bengal ammonium salt as a photocatalyst and tert-butyl hydroperoxide (70% in water) as an oxidant in aqueous DMSO solution at roomtemperature under green LED (530-535 nm) irradiation under an air atmosphere
Aerobic Copper-Catalyzed Synthesis of (<i>E</i>)-Vinyl Sulfones by Direct C–S Bond Oxidative Coupling
作者:Xiao Liang、Mingteng Xiong、Heping Zhu、Kexin Shen、Yuanjiang Pan
DOI:10.1021/acs.joc.9b01400
日期:2019.9.6
Copper-catalyzed aerobic oxidative C–Sbond coupling reaction between thiophenols and aryl-substituted alkenes for (E)-vinyl sulfones synthesis is reported here. With air utilized as a green oxidant, this transformation not only produces various vinyl sulfones in moderate to good yields but also possesses a simple and ecofriendly system. To clarify the mechanism, kinetic experiments has been investigated
Copper-catalyzed highly selective direct hydrosulfonylation of alkynes with arylsulfinic acids leading to vinyl sulfones
作者:Wei Wei、Jinli Li、Daoshan Yang、Jiangwei Wen、Yueting Jiao、Jinmao You、Hua Wang
DOI:10.1039/c3ob42522c
日期:——
Copper-catalyzed direct hydrosulfonylation of alkynes with arylsulfinic acids for the synthesis of (E)-vinyl sulfones has been developed with 100% atom efficiency.