Kinetic resolution by copper-catalyzed azide–alkyne cycloaddition
摘要:
The use of chiral pybox ligands imparts enantioselectivity to the Cu-I-catalyzed azide-alkyne cycloaddition reaction, in the form of kinetic resolution of alpha-chiral azides and desymmetrization of gem-diazides. While levels of selectivity are modest, the results show unequivocally that the process benefits from ligand-accelerated catalysis. (c) 2005 Elsevier Ltd. All rights reserved.