Access to Aromatic Ring-Fused Benzimidazoles Using Photochemical Substitutions of the Benzimidazol-2-yl Radical
作者:Fawaz Aldabbagh、Joanne O’Connell、Eoin Moriarty
DOI:10.1055/s-0032-1316775
日期:——
onto the benzimidazole-2-position. Photochemical five-, six-, and seven-membered cyclizations from 2-iodo-1-(ω-arylalkyl)-1H-benzimidazoles are described. This method of producing aromatic ring-fused benzimidazoles is significantly more efficient than literature radical protocols using chemical initiators, although 2-iodo-1-(ω-pyridin-2-ylalkyl)-1H-benzimidazoles preferentially undergo a nucleophilic ipso-substitution
摘要 描述了从2-碘-1-(ω-芳烷基)-1 H-苯并咪唑的光化学五元,六元和七元环化。这种生产芳环稠合苯并咪唑的方法比使用化学引发剂的自由基方法明显更有效,尽管2-碘-1-(ω-吡啶-2-基烷基)-1H-苯并咪唑优先经历亲核性的ipso-取代反应。苯并咪唑-2-位。 描述了从2-碘-1-(ω-芳烷基)-1 H-苯并咪唑的光化学五元,六元和七元环化。这种生产芳环稠合苯并咪唑的方法比使用化学引发剂的自由基方法明显更有效,尽管2-碘-1-(ω-吡啶-2-基烷基)-1H-苯并咪唑优先经历亲核性的ipso-取代反应。苯并咪唑-2-位。