Intramolecular Photo [2+2] cycloaddition of 2-Alkenoyloxycyclohex-2-enones

Abstract

Photoirradiation of 2-(3-butenoyloxy)-and 2-(4-pentenoyloxy) cyclohex-2-enones resulted in the formation of 2-oxabicyclo [3. 2. 0] heptan-3-one and 2-oxabicyclo [4. 2. 0] octan-3-one derivatives (head-to-head adducts), respectively.