Axially dissymmetric binaphthyldiimine chiral Salen-type ligands for catalytic asymmetric addition of diethylzinc to aldehyde

The axially dissymmetric chiral Schiff base ligand 10, prepared by the reaction of (R)-(+)-1,1′-binaphthyl-2,2′-diamine with (R)-(+)-2,2′-dihydroxy-[1,1′]-binaphthalenyl-3-carbaldehyde, is a fairly effective chiral ligand for the catalytic asymmetric addition reaction of diethylzinc to aldehydes. [Copyright &y& Elsevier]