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
The first nucleophilic substitution reaction of organoindium reagents with sulfonyl chlorides: a facile method for preparation of vinyl sulfones
作者:Guisheng Deng、Jingyuan Zou
DOI:10.3998/ark.5550190.0011.214
日期:——
The firstnucleophilicsubstitutionreaction of organoindium with sulfonylchlorides has been exploited. This reaction of vinylindium, derived from terminal alkynes via hydroindation, with sulfonylchlorides in the presence of Ag2O provides access to vinylsulfones. The vinylsulfones were formed highly regio- and stereo-selectively with E stereochemistry.
有机铟与磺酰氯的第一个亲核取代反应已经被开发出来。在 Ag2O 存在下,通过加氢反应衍生自末端炔烃的乙烯基铟与磺酰氯的这种反应提供了获得乙烯基砜的途径。乙烯基砜是通过 E 立体化学高度区域和立体选择性地形成的。
Copper(II)-Catalyzed Chemo- and Stereocontrolled Synthesis of (E)-Vinyl Sulfones and (Z)-β-Chlorovinyl Sulfones from Terminal Alkynes and Arylsulfonyl Hydrazides
chemoselectivity as well as stereoselectivity. A facile copper(II)-catalyzed regio- and stereocontrolled synthesis of vinyl sulfones from terminal alkynes and arylsulfonyl hydrazides is described. Depending on the source of copper(II), two different kinds of vinyl sulfones, (E)-vinyl sulfones and (Z)-β-chlorovinyl sulfones were obtained and the addition of cyclohexanone played an important role in the
PhI(OAc) 2 -mediated decomposition of N -arylsulfonyl hydrazones: metal-free synthesis of ( E )-vinyl sulfones
作者:Zaigang Luo、Yuyu Fang、Yu Zhao、Xuemei Xu、Chengtao Feng、Zhong Li、Xiaomei Zhang、Jie He
DOI:10.1016/j.tetlet.2016.07.099
日期:2016.9
preparing of (E)-vinylsulfones via PhI(OAc)2-mediated decomposition of ketone-derived N-arylsulfonyl hydrazones has been developed. The generation of α- or β-substituted vinylsulfones was affected by the steric hindrance at β-position of the substrates. This transformation provides an environment-friendly and important complementary strategy for the synthesis of various (E)-vinylsulfones.
N,N′-Disulfonylhydrazines: New sulfonylating reagents for highly efficient synthesis of (E)-vinyl sulfones at room temperature
作者:Dongping Luo、Lin Min、Weiping Zheng、Lidong Shan、Xinyan Wang、Yuefei Hu
DOI:10.1016/j.tet.2020.131019
日期:2020.3
has not been applied in organic synthesis except the formation of disulfones by self-dimerization of sulfonyl radicals. In this article, they were introduced as new sulfonylating reagents and their combinations with NIS and Et3N were established as excellent iodosulfonylating reagents for alkenes. Finally, a highly efficient method for the synthesis of (E)-vinyl sulfones was developed by mixing an alkene
Na2CO3 as a promoter and arenesulfinic acids as sulfonylating reagents. This simple and environmentally benign transformation offers an alternative approach and allows for easy and rapid synthesis of (E)-vinylsulfonesfrom arylpropiolic acids and arenesufinic acids.
芳基丙酸的脱羧磺酰化已经通过简单地使用Na 2 CO 3作为促进剂和芳烃磺酸作为磺酰化试剂来实现。这种简单且对环境无害的转化提供了一种替代方法,并允许从芳基丙酸和戊烯二酸轻松快速地合成(E)-乙烯基砜。