Homolytic aromatic substitution. Part XXXIV. Major products from the reaction of benzoyl peroxide with p-disubstituted benzenes
作者:D. I. Davies、D. H. Hey、B. Summers
DOI:10.1039/j39700002653
日期:——
p-tolyl sulphide, or methyl p-tolyl sulphoxide. The major reaction is oxidation at the sulphur atom, which leads to the formation of, in addition to benzoic anhydride, arylthiomethyl and arylsulphinylmethyl benzoates from the aryl sulphides and sulphoxides respectively. There is no evidence that free radicals are involved in the reaction of benzoyl peroxide with these sulphur-containing compounds.
过氧化苯甲酰与对-二取代苯(不包括具有硫取代基的苯)的反应可导致被苯基和/或苯甲酰氧基自由基取代。产物的形成依赖于取代基的性质,并且可以与哈米特相关联σ p值。在对位取代的甲苯,联苄类的形成与在增加而降低σ p的值对位-取代。在过氧化苯甲酰与甲基苯硫醚,甲基对甲苯硫醚或甲基对苯二酚的反应中,未观察到芳环的苯基化或苯甲酰氧基化。-甲苯基亚砜。主要反应是在硫原子上的氧化,除苯甲酸酐外,还导致分别由芳基硫醚和亚砜形成芳基硫基甲基和芳基亚磺酰基甲基苯甲酸酯。没有证据表明自由基参与过氧化苯甲酰与这些含硫化合物的反应。