Scheme 2. Results from new chiral ligands. Yield based on 1H NMR with MeNO2 as internal standard. Ee's were determined by chiral HPLC. The ligand series ‘a’ corresponds to the ligands that were synthesised using the enantiomer of the amine precursor which have negative αD, and the ligand series ‘b’ corresponds to the ligands that were synthesised using the enantiomer of the amine precursor which have positive αD.
