作者:M. P. Shurygina、Yu. A. Kurskii、N. O. Druzhkov、S. A. Chesnokov、G. A. Abakumov
DOI:10.1134/s0018143910030148
日期:2010.5
The photochemical transformations of quinones by the action of light at λ > 500 nm, namely, the photodecarbonylation and photoreduction reactions were studied with the use of a series of o-benzoquinones and 9,10-phenanthrenequinone as examples. The two-stage mechanism of the decarbonylation reaction of o-benzoquinones was established. At the first stage, rearrangement of a photoexcited quinone molecule
以一系列邻-苯醌和9,10-菲醌为例,研究了λ> 500 nm下光的作用下醌的光化学转化,即光脱羰和光还原反应。建立了邻苯醌醌脱羰反应的两阶段机理。在第一阶段,将光激发的醌分子重排成双环化合物,该化合物在黑暗反应中自发分解成环戊二烯酮和CO。已经发现,在各种氢供体存在下,邻-苯醌和9,10-菲醌的光还原产物的形成(N,N-二甲基苯胺和聚甲基苯)遵循相同的机理。第一步,制备酚醚,随后通过杂化机理将其定量转化为邻苯二酚或酮醇。酚醚的稳定性取决于反应物的结构和氧化还原特性。