Asymmetric
oxidative desymmetrization of 2-substituted glycerols
has been achieved by using a new chiral bisoxazoline ligand/copper
catalyst system with 1,3-dibromo-5,5-dimethylhydantoin and MeOH. The
present transformation smoothly proceeds with readily accessible 2-(hetero)aryl-
and alkyl-substituted glycerols and provides straightforward access
toward various glycerate derivatives in good to high yields with high
enantioselectivities. The synthetic utility of the present protocol
was demonstrated by the transformation of the optically active glycerol
into a glyceraldehyde derivative.
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