Atom‐Economic, Regiodivergent, and Stereoselective Coupling of Imidazole Derivatives with Terminal Allenes
作者:Kun Xu、Niels Thieme、Bernhard Breit
DOI:10.1002/anie.201309126
日期:2014.2.17
Pd‐catalyzed regiodivergent and stereoselective intermolecular coupling reactions of imidazolederivatives with mono‐substituted allenes are herein reported. Using a RhI/Josiphos system, perfect regioselectivities and high enantiomeric excess were obtained, while a PdII/dppf system gave linear products with high regioselectivities and high E/Z selectivities. This method permits the atomeconomic synthesis
本文报道了新的Rh和Pd催化的咪唑衍生物与单取代的Allenes的区域发散和立体选择性分子间偶联反应。使用Rh I / Josiphos系统,可以获得完美的区域选择性和高对映体过量,而Pd II / dppf系统则可提供具有高区域选择性和高E / Z选择性的线性产物。该方法允许原子经济地合成有价值的支链和线性烯丙基咪唑衍生物。