Synthesis of two new types of ‘head-to-head’ N,N-alkoxy bisbenzimidazoles is described. The proposed intermediate N-oxy benzimidazole from base-induced heterocyclization of N-alkylnitroanilines can be trapped with a biselectrophile (to give an N,N-linked dimer), or double heterocyclization of dimeric nitroanilines can be intercepted by electrophile trapping of both N-oxybenzimidazole termini to give
描述了两种新型“头对头” N,N-烷氧基双
苯并咪唑的合成。所提出的中间ñ从碱诱导heterocyclization氧基
苯并咪唑Ñ -alkylnitroanilines可以用biselectrophile被捕获(以得到Ñ,ñ -连接的二聚体),或二聚体
硝基苯胺的双heterocyclization可以通过两者的亲电子俘获被截获ñ -氧
苯并咪唑末端得到C2,C2连接的二聚体。这些代表构成新类别的
苯并咪唑二聚体的两个区域异构基序。