A novel and efficient synthesis of xanthones is described. 2-(Trimethylsilyl)phenyl 2-fluorobenzoate derivatives undergo Fries-type rearrangement and intramolecular SNAr reaction in a one-pot sequential manner under fluoride ion-promoted mild conditions. The method provides efficient access to xanthones that have significant steric congestion around the C9 carbonyl, which are not readily available
Continuous-Flow Synthesis of Trimethylsilylphenyl Perfluorosulfonate Benzyne Precursors
作者:Boris Michel、Michael F. Greaney
DOI:10.1021/ol500959e
日期:2014.5.16
2-(Trimethylsilyl)phenyl perfluorosulfonated aryne precursors may now be accessed using flow chemistry, enabling the fast preparation of pure compounds with no requirement for low temperature lithiation or column chromatography. The process has been adapted to novel nonaflate precursors, utilizing the cheaper and more user-friendly nonaflyl fluoride reagent. The resultant nonaflates are shown to successfully
N,N‐Diarylsulfonamide Reduces Proinflammatory Cytokine Interleukin‐6 Levels in Cells through Nuclear Factor‐κB Regulation
作者:Dattatraya A. Babar、Gopinath Khansole、Vishal Kumar Singh、Akash Shinde、Kambhampati Vaishnavi、Andugulapati Sai Balaji、Haridas B. Rode
DOI:10.1002/cmdc.202300598
日期:2024.7.2
The synthesized sulfonamides were evaluated for cytotoxicity followed by the cytokine/inflammatory marker’s inhibition capability and its mechanism of action in RAW‐264.7 cells. Elevated interleukin‐6 (IL‐6) levels have been reported in inflammatory conditions and inflammation‐associated disorders. Hence, reducing the IL‐6 levels in inflammatory conditions can serve as an attractive therapeutic target in dealing the inflammation. Among 42 compounds, seven compounds showed significant inhibition of IL‐6 levels in lipopolysaccharide (LPS) challenged RAW‐264.7 cells at 12.5 µM concentration. Further, investigation revealed that the IC50 value of these compounds for reducing IL‐6 levels was found to be in the range of 9.7 to 2.6 µM. The promising compounds 5y (IC50 of 2.6 µM) and 5n (IC50 of 4.1 µM) along with other derivatives fulfil drug‐likeness parameters laid down by Lipinski’s rule of five. Further, analysis using RTqPCR and Western‐blot analysis revealed that treatment with 5n significantly reduced the expression of pro‐inflammatory, inflammatory and macrophage marker’s expression (IL‐1β, CCL2, COX2 and CD68) compared to LPS control. The mechanistic evaluation showed that RL‐442 exhibited anti‐inflammatory properties by modulating the nuclear factor‐κB (NF‐κB) activation. The identified compound can be a promising candidate for further discovery efforts to generate a preclinical candidate effective in inflammation.