Light-Stable Silver N-Heterocyclic Carbene Catalysts for the Alkynylation of Ketones in Air
作者:Faïma Lazreg、Mathieu Lesieur、Andrew J. Samson、Catherine S. J. Cazin
DOI:10.1002/cctc.201500869
日期:2016.1
N‐Heterocyclic carbene (NHC) silver(I) complexes were employed efficiently in the alkynylation of ketones. These cationic complexes were highly active and efficient under mild conditions and in air without the need for an additive. The mechanism of this transformation was investigated. Experiments suggest that the formation of a silver acetylide key intermediate and the release of one ligand from the
Development of a novel octahedron rhodium complex and its application to the alkynylation of isatin derivatives
作者:Ze-ying Wu、Zhen-wei Zhang、Lin-lin Ding、Mei Xiang、Shi-yi Luo
DOI:10.1016/j.tetlet.2020.152577
日期:2020.11
A new octahedron rhodiumcomplex was synthesized, which permits the direct activation of terminal alkynes and its reaction with isatin derivatives under an air atmosphere. An excellent yield (up to 99%) was obtained at a catalyst loading of 2 mol%.