A wide range of aliphatic and aromatic α-keto esters
has been transformed to α-hydroxy-β-nitro esters
via the Cu(II)-bisoxazolidine-catalyzed Henry reaction.
In the presence of 10 mol% of the chiral catalyst, nitroaldol
products were obtained in up to 95% yield and 76% ee.
asymmetric catalysis - nitroaldol reaction - chiral
alcohols - copper - oxazolidine