Asymmetric Henry Reactions Catalyzed by Metal Complexes of Chiral Boron-Bridged Bisoxazoline (borabox) Ligands
作者:Aurélie Toussaint、Andreas Pfaltz
DOI:10.1002/ejoc.200800570
日期:2008.9
Metalcomplexes of boron-bridgedbisoxazolines (boraboxligands) were evaluated as catalysts for the Henryreaction. Copper(II) complexes induced high enantio- and diastereoselectivity in reactions with nitroethane and nitropropane. The amount of base added had a strong influence on the formation of the chiralcomplex and the enantioselectivity. Comparison with the corresponding dimethylmethylene-bridged