Preparation of chiral cyclopropanecarboxylic acids and 3-oxabicyclo[3.1.0]hexane-2-ones from levoglucosenone

Levoglucosenone (a chiral α,β-unsaturated ketone derivative of cellulose) serves as a starting compound in 2 and 3 step syntheses of chiral cyclopropanecarboxylic acids and 3-oxabicyclo[3.1.0]hexane-2-ones, respectively.