Assembly of Substituted 1<i>H</i>-Benzimidazoles and 1,3-Dihydrobenzimidazol-2-ones via CuI/<scp>l</scp>-Proline Catalyzed Coupling of Aqueous Ammonia with 2-Iodoacetanilides and 2-Iodophenylcarbamates
作者:Xiaoqiong Diao、Yuji Wang、Yongwen Jiang、Dawei Ma
DOI:10.1021/jo9017183
日期:2009.10.16
CuI/l-proline catalyzed coupling of aqueous ammonia with 2-iodoacetanilides and 2-iodophenylcarbamates affords the aryl amination products at room temperature, which undergo in situ additive cyclization under acidic conditions or heating to give substituted 1H-benzimidazoles and 1,3-dihydrobenzimidazol-2-ones, respectively. A wide range of functional groups including ketone, nitro, iodo, bromo, and
CuI / l-脯氨酸催化氨水与2-碘乙酰苯胺和2-碘苯基氨基甲酸酯的偶联在室温下提供芳基胺化产物,将其在酸性条件下进行原位加成环化或加热以生成取代的1 H-苯并咪唑和1,3-二氢苯并咪唑-2-酮。在这些反应条件下,可以耐受包括酮,硝基,碘,溴和酯在内的各种官能团,从而为这些杂环提供了极大的多样性。