Rhenium-Catalyzed Highly Efficient Oxidations of Tertiary Nitrogen Compounds to <i>N</i>-Oxides Using Sodium Percarbonate as Oxygen Source
作者:Bir Sain、Suman Jain、Jomy Joseph
DOI:10.1055/s-2006-951487
日期:2006.9
Sodiumpercarbonate was found to be an ideal and efficient oxygen source for the oxidation of tertiary nitrogen compounds to N-oxides in excellent yields in presence of various rhenium-based catalysts under mild reaction conditions.
Rhodium-Catalyzed Annulation of Tertiary Aniline <i>N</i>-Oxides to <i>N</i>-Alkylindoles: Regioselective C–H Activation, Oxygen-Atom Transfer, and <i>N</i>-Dealkylative Cyclization
作者:Bin Li、Hong Xu、Huanan Wang、Baiquan Wang
DOI:10.1021/acscatal.6b00311
日期:2016.6.3
[Cp*RhIII]-catalyzed annulation of tertiary aniline N-oxides with alkynes was reported to achieve the challenging ortho C–Hfunctionalization of tertiary anilines via N–O bond acting as a traceless directing group. More significantly, this system represents the first example which integrates C–H activation, oxygen-atom transfer, and N-dealkylative cyclization in one reaction. This unprecedented coupling
据报道,[Cp * Rh III ]催化炔烃与叔胺N-氧化物的环化反应是通过N-O键作为无痕导向基团实现的,具有挑战性的叔苯胺邻位C-H功能化。更重要的是,该系统代表了第一个示例,该示例在一个反应中集成了C–H活化,氧原子转移和N-脱烷基环化。这种空前的偶联反应使N-烷基吲哚衍生物的构建具有高效率,宽泛的底物范围和良好的官能团耐受性。
Rh(<scp>iii</scp>)-catalyzed chemoselective C–H functionalizations of tertiary aniline N-oxides with alkynes
作者:Xiaolei Huang、Wenbo Liang、Yang Shi、Jingsong You
DOI:10.1039/c6cc02217k
日期:——
Two novel Rh(iii)-catalyzed chemoselective functionalizations of tertiary aniline N-oxides with alkynes, including annulation via the sequential C(sp2)–H and C(sp3)–N activation and an O-atom transfer (OAT) process, have been described.
<i>N</i>-Oxide as a Traceless Oxidizing Directing Group: Mild Rhodium(III)-Catalyzed CH Olefination for the Synthesis of<i>ortho</i>-Alkenylated Tertiary Anilines
作者:Xiaolei Huang、Jingsheng Huang、Chenglong Du、Xingyi Zhang、Feijie Song、Jingsong You
DOI:10.1002/anie.201307174
日期:2013.12.2
Double role: A traceless directinggroup also acts as an internal oxidant in a novel RhIII‐catalyzed protocol developed for the synthesis of ortho‐alkenylated tertiary anilines (see scheme). A five‐membered cyclometalated RhIII complex is proposed as a plausible intermediate and confirmed by X‐ray crystallographic analysis.
The present invention provides unimolecular metal complexes having increased activity in the copolymerization of carbon dioxide and epoxides. Also provided are methods of using such metal complexes in the synthesis of polymers. According to one aspect, the present invention provides metal complexes comprising an activating species with co-catalytic activity tethered to a multidentate ligand that is coordinated to the active metal center of the complex.