through quorumsensing (QS), which is an intercellular communication system mediated by the binding of signaling molecules to QS receptors such as LasR. In this study, a range of dihydropyrrolone (DHP) analogues were synthesized via the lactone-lactam conversion of lactone intermediates. The synthesized compounds were tested for their ability to inhibit QS, biofilm formation and bacterial growth of
Iron powder and tin/tin chloride as new reducing agents of Meerwein arylation reaction with unexpected recycling to anilines
作者:Ahmed B. Abdelwahab、Eslam R. El-Sawy、Gilbert Kirsch
DOI:10.1080/00397911.2019.1704786
日期:2020.2.16
of NaNO2/HCl was trapped by alkyl aryl radical to form oximes in the E configuration form. The presence of tin/tin chloride mixture in the reaction of the aryl diazonium salts with methyl vinyl ketone produced Michael products along with β-aryl methyl ketones. The predicted α-aryl methyl ketones from the reaction of isopropenyl acetate with the diazotized anilines were obtained using iron or tin/tin
摘要 开发了使用铁粉或锡/氯化锡混合物进行Meerwein芳基化反应的简单快速路线。在铁粉存在下,不同的芳基重氮盐与甲基乙烯基酮、丙烯酸酯和乙酸异丙烯酯反应。在甲基乙烯基酮的情况下,肟的生产被检测为丙烯酸酯的主要产物或与β-芳基甲基酮的混合物。由过量的 NaNO2/HCl 原位生成的 HNO2 被烷基芳基捕获,形成 E 构型形式的肟。在芳基重氮盐与甲基乙烯基酮的反应中锡/氯化锡混合物的存在产生迈克尔产物以及β-芳基甲基酮。使用铁或锡/锡氯化物混合物从乙酸异丙烯酯与重氮化苯胺的反应中获得预测的α-芳基甲基酮。图形概要
Synthesis of α-Deuterioalcohols by Single-Electron Umpolung Reductive Deuteration of Carbonyls Using D2O as Deuterium Source
作者:Yuxia Hou、Zemin Lai、Lei Ning、Yixuan Li、Jie An、Hengzhao Li、Ailing Li
DOI:10.1055/a-1523-3336
日期:2021.7
Deuteriumincorporation can effectively stabilize the chiral centers of drug and agrochemical candidates that hampered by rapid in vivo racemization. In this work, the synthetically challenging chiral-center deuteration of alcohols has been achieved via a single-electron umpolung reductive-deuteration protocol using benign D2O as deuterium source and mild SmI2 as electron donor. The broad scope and
作者:Haiwen Xiao、Zhonglin Liu、Haigen Shen、Benxiang Zhang、Lin Zhu、Chaozhong Li
DOI:10.1016/j.chempr.2019.02.006
日期:2019.4
Direct trifluoromethylation of C(sp3)–H bonds, especially in late stages, remains a formidable challenge. Herein, we describe the copper-catalyzed benzylicC(sp3)–H trifluoromethylation. With Cu(I) or Cu(II) as the catalyst, (bpy)Zn(CF3)2 (bpy = 2,2′-bipyridine) as the CF3 source, and NFSI (or Selectfluor) as the oxidant, site-selective benzylicC(sp3)–H trifluoromethylation is successfully implemented