Copper-catalysed oxidative C–H/C–H coupling between olefins and simple ethers
作者:Dong Liu、Chao Liu、Heng Li、Aiwen Lei
DOI:10.1039/c4cc00867g
日期:——
The first copper-catalysed oxidative alkenylation of simple ethers to construct allylic ethers was successfully achieved. Different substituted olefins and simple ethers could be cross-coupled well to generate the corresponding alkenylation products. Notably, open-chain ethers were also found to be efficient coupling partners in this reaction. This reaction is likely to proceed via a radical process
Branched Arylalkenes from Cinnamates: Selectivity Inversion in Heck Reactions by Carboxylates as Deciduous Directing Groups
作者:Jie Tang、Dagmar Hackenberger、Lukas J. Goossen
DOI:10.1002/anie.201605744
日期:2016.9.5
A decarboxylative Mizoroki–Heck coupling of aryl halides with cinnamic acids has been developed in which the carboxylate group directs the arylation into its β‐position before being tracelessly removed through protodecarboxylation. In the presence of a copper/palladium catalyst, both electron‐rich and electron‐deficient arylbromides and chlorides bearing numerous functionalities were successfully
Photocatalytic Dehydrogenative Cross-Coupling of Alkenes with Alcohols or Azoles without External Oxidant
作者:Hong Yi、Linbin Niu、Chunlan Song、Yiying Li、Bowen Dou、Atul K. Singh、Aiwen Lei
DOI:10.1002/anie.201609274
日期:2017.1.19
Direct cross‐coupling between alkenes/R‐H or alkenes/RXH is a dream reaction, especially without external oxidants. Inputting energy by photocatalysis and employing a cobalt catalyst as a two‐electron acceptor, a direct C−H/X−H cross‐coupling with H2 evolution has been achieved for C−O and C−N bond formation. A new radical alkenylation using alkene as the redox compound is presented. A wide range of