First X-ray Structure of a<i>N</i>-Naphthaloyl-Tethered Chiral Dirhodium(II) Complex: Structural Basis for Tether Substitution Improving Asymmetric Control in Olefin Cyclopropanation
作者:Ashraf Ghanem、Michael G. Gardiner、Rachel M. Williamson、Paul Müller
DOI:10.1002/chem.200903231
日期:2010.3.15
Good‐ee! The first one‐pot olefincyclopropanation that gives high ee is reported. The optimized catalyst is the 4‐Br‐substitutedchiral paddle‐wheel tetracarboxylatodirhodium(II) complex based on N‐naphthaloyl‐(S)‐tert‐leucinate. X‐ray structural analysis of the parent catalyst reveals a square chiral crown cavity shrouding the axial coordination site (see figure).