Abstract The synthesis and photolysis of the title compound 3 is described. Irradiation (λ> 280 nm, MeCN) of the di-epoxyketone 3 leads predominantly to γ–H abstraction. Cyclization furnishes the cyclobutanols 22–24, while cleavage gives compound 25, presumably via the allene-oxide intermediate 36. Further, products 27 and 28 are formed by Norrish fragmentation and by initial cleavage of the C (α)[BOND] O bond of the oxirane, ...
