one equivalent of 2,4,6‐trichloro‐1,3,5‐triazine (cyanuric chloride) generates an easy handling formylatingagent for the efficient formylation of these classes of compounds to give the corresponding aldehydes under mild reaction conditions. This procedure was highly efficient, and a range of formylated indoles and pyrroles were obtained in good to excellent yields.
The increasing incidence of antibiotic resistance has forced the development of unique antimicrobials with novel multitargeting mechanisms to combatinfectiousdiseases caused by multidrug-resistant pathogens. Structurally unique indolylcyanoethylenyl sulfonylanilines (ISs) were exploited as novel promising antibacterial agents to confront stubborn drug resistance. Some prepared ISs possessed favorable
抗生素耐药性发生率的增加迫使人们开发出具有新颖多靶点机制的独特抗菌药物,以对抗由多重耐药病原体引起的传染病。结构独特的吲哚氰乙烯磺酰苯胺(IS)被开发为新型有前景的抗菌剂来对抗顽固的耐药性。一些制备的 IS 对测试细菌具有良好的抑菌作用。尤其是,羟乙基IS 14a对多重耐药鲍曼不动杆菌和大肠杆菌25922的抑制效果比诺氟沙星低8倍,MIC仅为0.5 μg/mL ,且具有低细胞毒性和快速杀菌特性。此外,该化合物还具有明显的消灭细菌生物膜的作用,可以有效缓解耐药性的产生。抗菌机制的初步评估表明,化合物14a可以破坏细胞膜完整性,导致细胞内蛋白质渗漏、乳酸脱氢酶失活和代谢抑制。羟乙基IS 14a介导过量活性氧的积累,进一步导致谷胱甘肽减少,导致细菌氧化损伤。此外,IS 14a可以嵌入 DNA 中,阻碍 DNA 的生物学功能。量子化学研究表明,能隙最低的IS 14a有利于表现出高生物活性。这些发现表明,羟乙基
An unanticipated discovery of novel naphthalimidopropanediols as potential broad-spectrum antibacterial members
作者:Peng-Li Zhang、Mouna Hind Laiche、Yan-Liang Li、Wei-Wei Gao、Jian-Mei Lin、Cheng-He Zhou
DOI:10.1016/j.ejmech.2022.114657
日期:2022.11
Constructing a new antibacterial structural framework is an effective strategy to combat drug resistance. This work discovered a class of naphthalimidopropanediols (NIOLs) as a novel structural type of potential broad-spectrum antibacterial agents. Especially, NIOLs 9u, 12i, 15 against Staphylococcus aureus and NIOLs 9l, 13a against Pseudomonasaeruginosa showed excellent inhibitory activities, and
Palladium‐Catalyzed C3‐Carbaldehyde Directed Regioselective C2‐Thioarylation of Indoles
作者:Sandip Kumar Gupta、Niranjan Panda
DOI:10.1002/asia.202400272
日期:——
directing potential of weakly coordinating aldehyde group present at 3-position of indole was exploited for regioselective C2-H thioarylation over the possible C4-H functionalization. Mechanistic studies reveal that the process involves initial generation of thioaryl radical followed by sequential C−H activation, thiolate transfer, and reductiveelimination.