A tandem cyclization/aromatization of anilines and aldehydes was achieved under catalytic radical cation salt induced conditions, producing a series of 2,3-disubstituted quinolines in good yields. In this reaction, the in situ generated imine tautomerizes to enamine, which acts as a dienophile to participate in the tandem cyclization, and further elimination of the anilino group triggers the aromatization
在催化自由基阳离子盐诱导的条件下,实现了
苯胺和醛的串联环化/芳构化,从而以高收率生产了一系列的2,3-二取代
喹啉。在该反应中,原位生成的
亚胺互变异构成烯胺,后者作为亲双烯体参与串联环化反应,进一步消除
苯胺基引发
四氢喹啉的芳构化,从而避免了恶劣的条件。