摘要:
A series of Co(III) anionic complexes of Schiff bases obtained from salicylaldehydes and enantiomerically pure amino acids has been synthesized. The outersphere counterion was exchanged by H+ and the novel chiral Bronsted acids were used to induce asymmetry into an aza-Diels-Alder reaction. The influence of the temperature, solvent polarity, and structural modification of the chiral anions on the enantioselectivity of the process has also been investigated. (C) 2013 Elsevier Ltd. All rights reserved.