Switchable Stereoselectivity in Bromoaminocyclization of Olefins: Using Brønsted Acids of Anionic Chiral Cobalt(III) Complexes
作者:Hua-Jie Jiang、Kun Liu、Jie Yu、Ling Zhang、Liu-Zhu Gong
DOI:10.1002/anie.201705066
日期:2017.9.18
Brønsted acids of anionic chiral CoIII complexes act as bifunctional phase‐transfer catalysts to shuttle the substrates across the solvent interface and control stereoselectivity. The diastereomeric chiral CoIII‐templated Brønsted acids, with the same chiral ligands, enabled a switch in the enantioselective bromoaminocyclization of olefins to afford the two enantiomers of 2‐substituted pyrrolidines
Zn(OTf)2-catalyzed intra- and intermolecular selenofunctionalization of alkenes under mild conditions
作者:Cong Qi、Zhaogong Lu、Yuyang Gu、Xiaofeng Bao、Biao Xiong、Gong-Qing Liu
DOI:10.1039/d4ra04266b
日期:——
Zn(OTf)2-catalyzed intra- and intermolecular selenofunctionalization of alkenes was achieved with electrophilic N-phenylselenophthalimide. This method provides straightforward and efficient access to various seleno-substituted heterocycles and vicinal Se heteroatom-disubstituted molecules undermildconditions. This reaction is compatible with various substrates/functional groups, and preliminary studies