Abstract
A synthesis of both enantiomers of levoglucosenone from acrolein dimer has been developed by employing lipase-mediated kinetic hydrolysis. Thus, acrolein dimer is transformed into racemic dihydrolevoglucosenone by sequential hydride reduction, oxidative acetalization, and Swern oxidation. Employing Saegusa-Larock conditions, dihydrolevoglucosenone is transformed into racemic levoglucosenone. The lipase-mediated resolution was best carried out under hydrolysis conditions with the endo-acetate generated from racemic levoglucosenone to give rise to highly enantioenriched (+)-alcohol and enantiopure (−)-acetate serving as the precursors of enantiopure levoglucosenone having the corresponding chirality.
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