Robust Acenaphthoimidazolylidene Palladium Complexes: Highly Efficient Catalysts for Suzuki–Miyaura Couplings with Sterically Hindered Substrates
作者:Tao Tu、Zheming Sun、Weiwei Fang、Mizhi Xu、Yunfei Zhou
DOI:10.1021/ol3019665
日期:2012.8.17
Robust acenaphthoimidazolylidene palladium complexes have been demonstrated as highly efficient and general catalysts for the sterically hindered Suzuki–Miyaura cross-coupling reactions in excellent yields even with low catalyst loadings under mild reaction conditions. The high catalytic activity of these complexes highlights that, besides the “flexible steric bulky” concept, σ-donor properties of
鲁棒的ena并咪唑基亚钯钯配合物已被证明是用于空间受阻的Suzuki-Miyaura交叉偶联反应的高效和通用催化剂,即使在温和的反应条件下催化剂用量低,其收率也很高。这些配合物的高催化活性表明,除了“灵活的立体庞大”概念外,NHC配体的σ供体特性对于加速转化也至关重要。