An unprecedented olefination reaction of secondaryamines with carbon nucleophiles has been developed through C–N/C–H functionalization under metal-free oxidative conditions. In the presence of a stoichiometric amount of 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ), a range of secondary N-alkylanilines smoothly underwent oxidative olefination with 2-alkylazaarenes, acetophenone, and malononitrile
Copper-catalyzed C2 alkenylation of pyridine-<i>N</i>-oxides with alkynes
作者:Shuxia Wang、Lei Sun、Minghui Gao、Qin Jiang、Weiming Hu、Yaya Liu、Chuanzhou Tao
DOI:10.1039/d2cc00851c
日期:——
A general and expedient method to construct the scaffolds of 2-alkenylpyridines, through copper-catalyzed C2 alkenylation of pyridine-N-oxides with alkynes, has been disclosed. This protocol shows operational simplicity, good functional group compatibility and broad substrate scope.