Iron-catalyzed direct alkenylation of sp3(C–H) bonds via decarboxylation of cinnamic acids under ligand-free conditions
作者:Hailong Yang、Hong Yan、Peng Sun、Yan Zhu、Linhua Lu、Defu Liu、Guangwei Rong、Jincheng Mao
DOI:10.1039/c3gc37131j
日期:——
An example of highly efficient low-cost ferrocene-catalyzed decarboxylative C(sp2)âC(sp3) coupling reactions via CâH functionalization has been developed successfully. It is noteworthy that nanoparticles of Fe3O4 could be used as a reusable catalyst for 7 times in the absence of ligand.
Copper-catalyzed oxidative alkenylation of C(sp<sup>3</sup>)–H bonds via benzyl or alkyl radical addition to β-nitrostyrenes
作者:Shengrong Guo、Yanqin Yuan、Jiannan Xiang
DOI:10.1039/c4nj02416h
日期:——
A new method for the preparation of (E)-β-alkylstyrene derivatives has been developed via the addition of a benzyl or alkyl radical to β-nitrostyrenes using di-tert-butyl peroxide (DTBP) as the oxidant in the presence of Cu powder catalyst. The C–H bonds in various toluene derivatives, ethers, alkanes and alcohols were successfully converted into C–C bonds to yield the corresponding (E)-β-alkylstyrene
Copper-catalyzed decarboxylative C(sp2)–C(sp3) coupling reactions via radical mechanism
作者:Hailong Yang、Peng Sun、Yan Zhu、Hong Yan、Linhua Lu、Xiaoming Qu、Tingyi Li、Jincheng Mao
DOI:10.1039/c2cc33203e
日期:——
We have successfully developed an example of copper-catalyzed decarboxylative C(sp(2))-C(sp(3)) coupling reactions via C-H functionalization for the first time. It is noteworthy that our catalytic system is very stable, low-cost, palladium-free, ligand-free, and easily accessible.
Covalent Organic Frameworks as a Versatile Platform for Iron‐Catalyzed sp<sup>3</sup> C−H Activation and Cross‐Coupling via Decarboxylative Oxidation
作者:Jhonny M. C. Cifuentes、Fábio J. F. S. Henrique、Carolina B. P. Ligiéro、Pierre M. Esteves、Camilla D. Buarque
DOI:10.1002/ejic.202300762
日期:——
Efficient oxidative cross-coupling of cinnamicacids with toluene using FeCl3 immobilized on COF pore walls, producing 1,3-arylpropene derivatives. Fine-tuning adjustment of heterogeneous catalytic systems to uncover a significant relationship between pore size and the efficiency of the reaction.