A Chiral Phenanthroline Ligand with a Hydrogen-Bonding Site: Application to the Enantioselective Amination of Methylene Groups
作者:Rajasekar Reddy Annapureddy、Christian Jandl、Thorsten Bach
DOI:10.1021/jacs.0c02803
日期:2020.4.22
of various quinolones and pyridones. The C-H activation reaction proceeded with high site- and enantioselectivity (14 examples, 83-97% ee). Key to its success is the use of a chiral phenanthroline ligand that is attached via an ethynyl linker to the 8-position of octahy-dro-1H-4,7-methanoisoindol-1-one. AgPF6 (10 mol%) served as the silver source, PhI=NNs as the nitrene precursor and 1,10- phenanthroline
据报道,在各种喹诺酮类和吡啶酮类的脂肪族 C3 取代基上发生了银催化的胺化。CH 活化反应以高位点和对映选择性进行(14 个实例,83-97% ee)。其成功的关键是使用手性菲咯啉配体,该配体通过乙炔基接头连接到八氢-1H-4,7-methanoisoindol-1-one 的 8 位。AgPF6 (10 mol%) 作为银源,PhI=NNs 作为氮烯前体,1,10-菲咯啉作为配体。反应结果可以通过假设在氢键银络合物中插入氮烯 CH 来理解,其中单个 CH 键暴露于催化反应中心。