Quasienantiomeric Levoglucosenone and Isolevoglucosenone Allow the Parallel Kinetic Resolution of a Racemic Nitrone

Cycloadditions of chiral pyrroline N-oxides to levoglucosenone (1) and isolevoglucosenone (2) proceed with a high
level of double asymmetric induction. Partial kinetic resolutions (KR) of both enantiomers of a racemic nitrone 3 were
achieved, and a parallel kinetic resolution (PKR) experiment
allowed the stereoselective divergent synthesis of two
quasienantiomeric imino-C-disaccharide precursors.