Two-electron anodic oxidation of o-nitrophenylthioiminocyclopentane (1) in methanol, followed by nucleophilic attacks of solvent and water (the latter present as an impurity in the solvent), gave methyl sulfinate and cyclopentaneimine. On the other hand, one-electron oxidation of o-nitrophenylthioiminocycloalkanes (1-6) in acetonitrile followed by deprotonation of the cation radical (B) gave the neutral radical (C), whcih then gave the thiyl radical (E). The rest of C reacted with E to give N, 2-bis(o-nitrophenylthio)iminocycloalkanes, whose oxidation gave the final products (9-14). The results of cyclic voltammetry of 1-6 also show that the initial steps of anodic oxidation of 1-6 in acetonitrile and in methanol are one- and two-electron oxidations, respectively.
邻
硝基苯硫代亚
氨基
环戊烷(1)在
甲醇中进行双电子阳极氧化,然后受到溶剂和
水(后者作为杂质存在于溶剂中)的亲核攻击,生成亚砜甲酯和
环戊烷亚胺。另一方面,邻
硝基苯硫代亚
氨基环烷(1-6)在
乙腈中发生单电子氧化,然后阳离子自由基(B)发生去质子化反应,生成中性自由基(C),然后生成
硫自由基(E)。其余的 C 与 E 反应生成 N,2-双(邻
硝基苯硫基)亚
氨基环烷,其氧化反应生成最终产物(9-14)。1-6 的循环伏安测定结果也表明,1-6 在
乙腈和
甲醇中阳极氧化的初始步骤分别是单电子氧化和双电子氧化。