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Beilstein J. Org. Chem. 2012, 8, 1920–1928, doi:10.3762/bjoc.8.223
Graphical Abstract
Scheme 1: Previous design of diastereomeric molecules 2 and 3 with switchable chirality starting from achiral...
Scheme 2: General design of asymmetric pentadentate ligands 4 and chiroptically switchable quasi-diastereomer...
Scheme 3: Preparation of imino–carbonyl ligands 13 by desymmetrization of achiral carbonyl–carbonyl ligands 12...
Scheme 4: Preparation of complexes 14a,b and 15 by reactions of ligands 12 with glycine.
Figure 1: Crystallographic structure of complex 14a.
Scheme 5: Oxidation of enolates 16 and formation of complexes 19 and 20.
Figure 2: Crystallographic structure of complex 19.