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)O bond of
描述了标题化合物3的合成和光解。二环氧酮3的辐照(λ> 280 nm,MeCN)主要导致γ–H的抽象。环化配料的cyclobutanols 22 - 24,而裂解,得到化合物25,据推测通过
丙二烯氧化物中间体36。此外,产物27和28分别通过诺里斯(Norrish)断裂和通过
环氧乙烷的C(α)O键的初始裂解而形成。该产物的结构22 - 25,27,和28被分配到的的光解产物的光谱数据的基础上,13 C标记的diepoxyketone [ 6,6 -二甲基- 13 Ç 2 ] - 3,并通过这些化合物的X射线分析24和35,后者是
对硝基苯甲酸酯的22。