Thermal cyclizations of nonconjugated ene–diyne–nitrile 1 and ene–triyne–nitrile 2 systems were examined and proved to yield not azafluorenol, but cyanofluorenol derivatives (9 and 11, respectively), indicating that the cyano groups do not participate in the radical cycloaromatization but do play important roles to determine the mode of cyclization.
对非共轭的烯-二炔-腈 1 和烯-三炔-腈 2 体系的热环化进行了研究,结果表明生成的不是偶氮
芴醇,而是
氰基
芴醇衍
生物(分别为 9 和 11),这表明
氰基并不参与自由基环
芳烃化,但在决定环化模式方面发挥着重要作用。