Chiral <i>C</i><sub>2</sub>-Symmetric Cu(II) Complex Immobilized in Ionic Liquids: A Recoverable Catalytic System for Enantioselective Hetero-Diels-Alder Reaction
作者:B. Kim、Yong Shin、Chang-Eun Yeom、Mi Kim
DOI:10.1055/s-2007-1000830
日期:2008.1
Hydrophobic ionicliquids such as [Bmim]PF 6 and [Bmim]SbF 6 were used successfully as powerful media for bis(oxazoline)-copper-catalyzed asymmetric hetero-Diels-Alder reactions. The reactivities and stereoselectivities were comparable ( ENDO/ EXO up to 97:3 and up to 94% ee, respectively) to those of the corresponding homogeneous reactions. Furthermore, the reaction was remarkably accelerated in [Bmim]PF