Abstract
Chiral N-heterocyclic carbenes (NHC) were synthesized from naturally occurring podophyllotoxin. Their coordination with [(η 3-allyl)Pd(Br)] 2 afforded (NHC)Pd(allyl)Br complexes, whose structures were unambiguously established by X-ray single crystal analysis. These chiral NHC and NHC-Pd-allyl complexes were found to catalyze the substitution reaction of allylic compounds with high conversions and enantioselectivities (up to 87% ee).
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