可见光诱导的光催化脱氢/6π环化/氧化级联反应将1-(硝基甲基)-2-芳基-1,2,3,4-四氢异喹啉转化为新型的12-硝基取代的四环吲哚[2,1- a ]异喹啉衍生物。各种光催化剂可在空气和碱的存在下促进反应,最有效的是将1-氨基蒽醌与K 3 PO 4结合使用。此外,通过扩展单锅程序与前述的光催化交叉脱氢偶联反应,可直接从C1未官能化的2‐芳基1,2,3,4‐四氢异喹啉中直接获得12‐硝基吲哚异喹啉产物,从而产生四级联反应转型。
Highly efficient heterogeneous aerobic cross-dehydrogenative coupling via C–H functionalization of tertiary amines using a nanoporous gold skeleton catalyst
作者:Hon Eong Ho、Yoshifumi Ishikawa、Naoki Asao、Yoshinori Yamamoto、Tienan Jin
DOI:10.1039/c5cc04856g
日期:——
We disclosed that zero-valent nanoporous gold (AuNPore) possesses remarkable catalytic activity and reusability for heterogeneous aerobic cross-dehydrogenative coupling (CDC) of various tertiary amines with nucleophiles.
A third strategy for cross-dehydrogenative coupling reaction has been reported via platinum-catalyzed sp3 C–H and sp3 C–H coupling reaction in the absence of oxidant. Nitroalkanes as well as dialkyl malonate derivatives, β-keto esters and malononitrile are active participants in this coupling reaction. Both cyclic and acyclic non-activated simple ketones are good reactants in this reaction.
Efficient aerobic cross-dehydrogenative coupling of tertiary amines over NiGa layered double oxide
作者:Zhonghua Sun、Zhenzhen Xia、Anwei Wang、Hui Wang、Zhong Zhang、Weiyou Zhou、Junfeng Qian、Mingyang He
DOI:10.1016/j.tetlet.2020.152254
日期:2020.8
An efficient and convenient heterogeneous catalytic system has been developed for the aerobic cross-dehydrogenative coupling over NiGa layered double oxide (Ni3Ga-LDO) without any additives. The results indicated that the catalytic system could tolerate various tetrahydroquinoline derivatives and nucleophiles using molecular oxygen as a sustainable oxidant. The catalyst could be recycled four times
Oxidative Functionalization of Cyclic N-Arylamines with Nitromethane and TMSCN Using the T-HYDRO/t-BuOK System
作者:Mariappan Periasamy、Gunda Rao
DOI:10.1055/s-0036-1590943
日期:2018.2
corresponding iminium ion intermediates via an initial electron transfer process. Tertiary cyclic N-arylamines react with nitromethane in the presence of the tert-butyl hydroperoxide (T-HYDRO)/t-BuOK system to give β-nitroamines in up to 90% yield. When TMSCN is used in place of nitromethane, α-aminonitriles are obtained in up to 96% yield. The method is suitable for several unactivated cyclic arylamine substrates
摘要 在叔丁基氢过氧化物(T-HYDRO)/ t - BuOK体系存在下,环状N-芳基叔胺与硝基甲烷反应生成β-硝基胺,收率高达90%。当使用TMSCN代替硝基甲烷时,以高达96%的产率获得α-氨基腈。该方法适用于几种未活化的环状芳基胺底物。考虑到通过初始电子转移过程形成相应的亚胺离子中间体,这些转化是合理的。 在叔丁基氢过氧化物(T-HYDRO)/ t - BuOK体系存在下,环状N-芳基叔胺与硝基甲烷反应生成β-硝基胺,收率高达90%。当使用TMSCN代替硝基甲烷时,以高达96%的产率获得α-氨基腈。该方法适用于几种未活化的环状芳基胺底物。考虑到通过初始电子转移过程形成相应的亚胺离子中间体,这些转化是合理的。
A Visible Light Photocatalytic Cross-Dehydrogenative Coupling/Dehydrogenation/6π-Cyclization/Oxidation Cascade: Synthesis of 12-Nitroindoloisoquinolines from 2-Aryltetrahydroisoquinolines
A visiblelight‐induced photocatalytic dehydrogenation/6π‐cyclization/oxidation cascade converts 1‐(nitromethyl)‐2‐aryl‐1,2,3,4‐tetrahydroisoquinolines into novel 12‐nitro‐substituted tetracyclic indolo[2,1‐a]isoquinoline derivatives. Various photocatalysts promote the reaction in the presence of air and a base, the most efficient being 1‐aminoanthraquinone in combination with K3PO4. Further, the
可见光诱导的光催化脱氢/6π环化/氧化级联反应将1-(硝基甲基)-2-芳基-1,2,3,4-四氢异喹啉转化为新型的12-硝基取代的四环吲哚[2,1- a ]异喹啉衍生物。各种光催化剂可在空气和碱的存在下促进反应,最有效的是将1-氨基蒽醌与K 3 PO 4结合使用。此外,通过扩展单锅程序与前述的光催化交叉脱氢偶联反应,可直接从C1未官能化的2‐芳基1,2,3,4‐四氢异喹啉中直接获得12‐硝基吲哚异喹啉产物,从而产生四级联反应转型。