Photochemical reactions. 141st communication. Photochemistry of ?,?-unsaturated ?,?-epoxyketones of the ionone series
作者:Peter Mathies、Bruno Frei、Oskar Jeger
DOI:10.1002/hlca.19850680124
日期:1985.2.13
On n,π*- as well as on π,π*-excitation, the 4,5-epoxy-α-ionones (E)-1, (E)-2, and (E)-3 undergo (E)/(Z)-isomerization and subsequent γ-H-abstraction leading to the corresponding 4-hydroxy-β-ionones (E/Z)-9, (E/Z)-13, and (E/Z)-17 as primary photoproducts. On photolysis of (E)-3, as an additional primary photoproduct, the β,γ-unsaturated σ,ϵ-epoxy ketone 18 was obtained. The other isolated compounds
在n,π*-以及π,π*激发下,4,5-环氧-α-紫罗兰酮(E)-1,(E)-2和(E)-3经历(E)/ (Z)异构化和随后的γ-H-提取产生相应的4-羟基-β-紫罗兰酮(E / Z)-9,(E / Z)-13和(E / Z)-17作为初级光产物。 。关于(E)-3的光解作为另外的一次光产物,获得了β,γ-不饱和σ,β-环氧酮18。其他分离的化合物,即2 H-吡喃10A + B和14A + B以及逆向γ-紫罗兰酮11和15A + B,代表已知类型的产物,它们衍生自4-羟基-β-紫罗兰酮(E / Z)-9和(E / Z)-13。