Reconnaissance of reactivity of an Ag(<scp>ii</scp>)SO<sub>4</sub> one-electron oxidizer towards naphthalene derivatives
作者:Adam K. Budniak、Michał Masny、Kristina Prezelj、Mikołaj Grzeszkiewicz、Jakub Gawraczyński、Łukasz Dobrzycki、Michał K. Cyrański、Wiktor Koźmiński、Zoran Mazej、Karol J. Fijałkowski、Wojciech Grochala、Piotr J. Leszczyński
DOI:10.1039/c7nj02299a
日期:——
7′-dibromo-1,1′-binaphthyls together with their trimeric and tetrameric analogues. The coupling of strongly electron-withdrawing 1-CF3-naphthalene provides the 5,5′-disubstituted-1,1′-binaphthyl derivative. The new method does not require the presence of halogen substituents, in contrast to most of the known C–C coupling methods, and it preserves them, if present. Ag(II)SO4 may be easily electrochemically
我们测试了二价硫酸银Ag(II)SO 4作为在环境温度条件下芳烃氧化偶联的新型试剂。举例说明了C(sp 2)–C(sp 2)偶联方案对萘及其包含电子给体(例如Me,MeO或Ph)或吸电子基团(X = F⋯)的1-取代衍生物的适用性。I),导致4,4'-二取代-1,1'-联萘基。2-溴萘的偶联产生2,2'-,2,7'-和7,7'-二溴-1,1'-联萘的混合物以及它们的三聚体和四聚体类似物。强吸电子1-CF 3的偶联-萘提供5,5'-二取代-1,1'-联萘衍生物。与大多数已知的C-C偶联方法相比,该新方法不需要卤素取代基,并且可以保留这些取代基(如果存在)。Ag(II)SO 4可以容易地从Ag(I)HSO 4副产物进行电化学再生。但是,CC耦合方法目前产量低,高达17%,还需要进一步优化。