functionalized quinolines and pyridines could be synthesized by BF3⋅OEt2‐mediated reactions of vinyl azides with N‐aryl and N‐alkenyl aldimines, respectively. The reaction mechanism could be characterized as formal [4+2]‐annulation, including unprecedented enamine‐type nucleophilic attack of vinyl azides to aldimines and subsequent nucleophilic cyclization onto the resulting iminodiazonium ion moieties.
高度官能化的
喹啉和
吡啶可以通过BF 3· OEt 2介导的
叠氮化物分别与N-芳基和N-烯基醛
亚胺反应而合成。该反应机理可以描述为正式的[4 + 2]-环化反应,包括
乙烯基叠氮化物对醛
亚胺的前所未有的烯胺型亲核攻击,以及随后的亲核环化反应生成的亚
氨基重氮离子部分。