An Efficient Butenolide Annulation via α′-Chloroacetoxylation of Enones Using Manganese(III) Acetate and Chloroacetic Acid

Abstract

The α′ -chloroacetoxylation of α,β-unsaturated ketones using manganese(III) acetate and chloroacetic acid followed by Arbuzov reaction and intramolecular Horner-Emmons olefination provided a convenient synthesis of annulated 2-buten-4-olides.