Synthetic Photochemistry. III. The Addition Reaction of Methyl Acetopyruvate to Cycloheptatriene: An Ene Reaction and (4+2)π and (6+2)π Cycloadditions

Abstract

Abstract The irradiation of methyl acetopyruvate with cycloheptatriene by means of a high-pressure mercury lamp has yielded (6+2)π and (4+2)π cycloadducts, together with tropylcarbinol derivatives formed by a formal abstraction of allylic hydrogen by the excited carbonyl group, this being the major process in this reaction.