In relation to the investigation of their electrochemical properties we prepared 24 pyridinium derivatives (I, IV, V, VI, VII) with alkyl and aryl substituents in positions 1, 2, 4 and 6, and 19 derivatives with two pyridinium nuclei (II, III, VIII, IX, X) connected by an aliphatic or an aromatic chain. All the compounds were prepared from the corresponding pyrylium derivatives by reacting them with primary amines. The pyrylium derivatives were synthesized by aldolization and acylation followed by cyclization leading to a heteroaromatic pyrylium system. In nucleophilic reactions with amines, the pyrylium derivatives yield pyridinium derivatives. The reaction was performed by adding the corresponding amine to an ethanolic suspension of the starting pyrylium salt.
关于它们的电化学性质的研究,我们制备了24种吡啶衍生物(I、IV、V、VI、VII),其中在1、2、4和6位上带有烷基和芳基取代基,以及19种带有两个吡啶核(II、III、VIII、IX、X)的衍生物,通过与初级胺反应得到。这些吡啶衍生物是通过醛缩和酰化反应合成的,随后经过环化反应形成了一个杂环芳基吡啶系统。在亲核反应中,吡啶衍生物与胺反应生成吡啶衍生物。该反应是通过将相应的胺加入起始吡啶盐的乙醇悬浮液中进行的。