Photoinitiated Additions of Ketones to Bicyclobutanes. The Existence of Diverse Reaction Pathways

Article abstract of DOI:10.1021/jo00185a068

A radical chain process has been established for the addition of a series of ketones across the C1-C3 bond of bicyclo<1.1.0>butane and its methylated derivatives.For certain ketones, capture of an acyl radical intermediate, generated in a Norrish type I cleaveage of the ketone, competes effectively with the radical chain process.