A photochemical approach to methyl-substituted 5-oxabicyclo[2.1.0]pent-2-enes (Dewar furans)

Abstract

U.V. irradiation of the N-methylsuccinimide-containing propellanes ( 12) and ( 13) yields the cyclopropenyl ketones ( 19) and ( 20) logically derived by the intermediacy of the Dewar furans (15) and ( 16).