Efficient monoacetal formation, unprecedented β-cleavage in caged cyclobutyl ketones and dual epimerization of 1,4-diones in the photochemistry of hexacyclo[10.2.1.02,11.04,9.04,14.09,13]pentadeca-5,7-diene-3,10-dione and related systems in alcoholic solvents
Abstract
Irradiation of the title compound and related caged cyclobutyl diones in alcoholic solvents at 300 nm furnishes good yields of monoacetals and leads to products arising from β-cleavage and dual epimerization.