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A convenient and rapid method for the preparation of chiral C 2 -symmetric 1,10-phenanthrolines is reported. As an example of this procedure the synthesis of new 1,10-phenanthroline (+)-7 and its 5,6-dihydro derivative (+)-6 from (-)-β-pinene is described. These ligands have been assessed in asymmetric copper(I)-catalyzed allylic oxidation of cycloalkenes affording enantioselectivities up...
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