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.
Efficient Synthesis of Vinyl Sulfones by Manganese-Catalyzed Decarboxylative Coupling of Cinnamic Acids with Aromatic Sulfinic Acid Sodium Salts
作者:Wei Deng、Jiannan Xiang、Na Xue、Ruqing Guo、Xinman Tu、Weiping Luo
DOI:10.1055/s-0035-1562476
日期:——
An efficient synthesis of vinyl sulfones is described. Reactions of cinnamic acids with aromatic sulfinic acid sodium salts in the presence of a catalytic amount of manganese(II) acetate tetrahydrate (5 mol%) in dimethyl sulfoxide (DMSO) afforded the desired vinyl sulfones in good to excellent yields. Notably, the reaction does not need any base or iodide as additive. The use of DMSO as the solvent
描述了乙烯基砜的有效合成。在二甲基亚砜 (DMSO) 中催化量的四水合乙酸锰 (II) (5 mol%) 存在下,肉桂酸与芳族亚磺酸钠盐的反应以良好至极好的收率提供所需的乙烯基砜。值得注意的是,该反应不需要任何碱或碘化物作为添加剂。使用 DMSO 作为溶剂并在空气中进行反应是获得良好收率的关键。
Intermolecular [2 + 2] Photocycloaddition of α,β-Unsaturated Sulfones: Catalyst-Free Reaction and Catalytic Variants
作者:Noah Jeremias、Lisa-Marie Mohr、Thorsten Bach
DOI:10.1021/acs.orglett.1c01794
日期:2021.8.6
2-Aryl-1-sulfonyl-substituted cyclobutanes were prepared in an intermolecular [2 + 2] photocycloaddition from various α,β-unsaturated sulfones and olefins upon irradiation at λ = 300 nm (26 examples, 60–99% yield). Lewisacids catalyzed the [2 + 2] photocycloaddition of 2-benzimidazolyl styryl sulfones. At short wavelengths, the latter substrates underwent C–S bond cleavage but AlBr3 (5 mol %) allowed
Synthesis of Vinylsulfones Via Palladium-Catalyzed Decarboxylative Coupling of Cinnamic Acids with Aromatic Sulfinic Acid Sodium Salts
作者:Ruqing Guo、Qingwen Gui、Dadian Wang、Ze Tan
DOI:10.1007/s10562-014-1286-5
日期:2014.8
A highly efficient synthesis of vinylsulfones was achieved via decarboxylative cross-coupling reaction of cinnamic acids with aromaticsulfinic acid sodium salts catalyzed by Pd(OAc)2 and dppb in the presence of Ag2CO3. The reaction was found to furnish various vinylsulfones in good yields instead of the expected desulfitative product stilbenes. Mechanistic investigation also suggested that the decarboxylation
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