Planar chiral N-heterocyclic carbenes that incorporate an iron sandwich complex into the NHC framework are disclosed for use in organocatalytic and transition metal-catalyzed reactions.
Ferrocene-Based Planar Chiral Imidazopyridinium Salts for Catalysis
作者:Christopher T. Check、Ki Po Jang、C. Benjamin Schwamb、Alexander S. Wong、Michael H. Wang、Karl A. Scheidt
DOI:10.1002/anie.201410118
日期:2015.3.27
Planarchirality remains an underutilized control element in asymmetric catalysis. Factors that have limited its broader application in catalysis include poor catalyst performance and difficulties associated with the economical production of enantiopure planarchiral compounds. The construction of planarchiral azolium salts that incorporate a sterically demanding iron sandwich complex is now reported