Palladium-catalyzed asymmetric allylic alkylation using chiral glucosamine-based monophosphines
摘要:
An easy access to a new chiral phosphine-amide derived from D-glucosamine is described. Palladium-catalyzed asymmetric allylic alkylation of racemic 1,3-diphenyl-2-propenyl acetate with various carbon and amino nucleophiles in the presence of this ligand has been successfully carried out, enantiomeric excesses of up to 97% being obtained. (C) 2003 Elsevier Ltd. All rights reserved.