Electrochemical reduction of N-(2-nitroaryl)pyridinium chlorides in alcohol—dilute HCl mixtures gave pyrido[1,2-a]benzimidazoles in high yields in both divided and undivided cells. According to cyclic voltammetry measurements and DFT calculations (B3LYP/6-31+G(d)), the reaction involves intermediate formation of the corresponding hydroxylamine derivative followed by its heterocyclization.
在
酒精-稀
盐酸混合物中对 N-(2-硝基芳基)
吡啶氯化物进行电
化学还原,在分裂和非分裂电池中都能得到高产率的
吡啶并[1,2-a]
苯并咪唑。根据循环伏安法测量和 DFT 计算(B3LYP/6-31+G(d)),反应涉及相应
羟胺衍
生物的中间形成,然后是其杂环化。