A practical preparation of chiral keto-imine type ONO Schiff base ligands has been reported. Metal complexes of these Schiff bases work as efficient chiral catalysts in a variety of asymmetric reactions. (C) 2013 Elsevier Ltd. All rights reserved.
NISHINAGA AKIRA; IWASAKI HITOSHI; SHIMIZU TADASHI; TOYODA YASUSHI; MATSUU+, J. ORG. CHEM., 51,(1986) N 12, 2257-2266