Protocol simplification is an important aspect in the development of organic reactions such as heteroarene functionalizations. An operationally facile protocol for the direct C–H alkylation of heteroarenes with unactivated ethers has been developed. The Minisci-type radical addition process involves thermolysis of potassium persulfate, circumventing the need for transition-metal catalysts.
Green oxidant H<sub>2</sub>O<sub>2</sub> as a hydrogen atom transfer reagent for visible light-mediated Minisci reaction
作者:Hong Zhao、Zhenlong Li、Jian Jin
DOI:10.1039/c9nj03106e
日期:——
A visiblelight-mediated “green” protocol for metal-free oxidative coupling of heteroarenes and aliphatic C–H components has been achieved via a radical pathway. This cross-dehydrogenative coupling method features a broad scope of substrates. The green oxidant H2O2 is used as a hydrogen atom transfer reagent, which is environmentally benign, low cost, and atom economical.
通过自由基途径实现了杂芳烃和脂肪族CH组分的无金属氧化偶联的可见光介导的“绿色”方案。这种交叉脱氢偶联方法具有广泛的底物特征。绿色氧化剂H 2 O 2用作氢原子转移试剂,对环境无害,成本低廉且原子经济。
Introduction of Ether Groups onto Electron-Deficient Nitrogen-Containing Heteroaromatics Using Radical Chemistry under Transition-Metal-Free Conditions
作者:Naoki Okugawa、Katsuhiko Moriyama、Hideo Togo
DOI:10.1002/ejoc.201500584
日期:2015.8
treated with benzoylperoxide in dioxane, tetrahydropyran, tetrahydrofuran, diethylether, and dipropyl ether at 80 °C to form alkylated nitrogen-containing heteroaromatics in good yields under transition-metal-free conditions. This method was successfully applied to the preparation of lariat aza-crown ethers using 18-crown-6 or 15-crown-5 with quinoline and isoquinoline in the presence of benzoyl peroxide