Transition‐Metal‐Free Synthesis of 1,2‐diphenyl‐1
<i>H</i>
‐benzo[
<i>d</i>
] Imidazole Derivatives from
<i>N</i>
‐phenylbenzimidamides and Cyclohexanones
作者:Guoqiang Lu、Nan Luo、Fangpeng Hu、Zihui Ban、Zhenzhen Zhan、Guo‐Sheng Huang
DOI:10.1002/adsc.201901161
日期:2020.2.6
A transition‐metal‐free strategy for the formation of 1,2‐diphenyl‐1H‐benzo[d] imidazoles from N‐phenylbenzimidamides and cyclohexanones is introduced. This is the first report on the direct synthesis of 1,2‐diphenyl‐1H‐benzo[d] imidazoles from cyclohexanones and N‐phenylbenzimidamides via iodine‐ promoted oxidative cyclization. Non‐aromatic cyclohexanones were smoothly dehydrogenated, and acted as
引入了一种无过渡金属的策略,用于由N-苯基苯甲酰胺和环己酮形成1,2-二苯基-1 H-苯并[ d ]咪唑。这是关于通过碘促进的氧化环化反应,由环己酮和N-苯基苯甲酰胺直接合成1,2-二苯基-1 H-苯并[ d ]咪唑的第一份报告。非芳族环己酮可顺利脱氢,并使用氧气作为绿色氧化剂充当芳基源。碘的催化使用使得该方法相当简单,更经济和方便。在优化条件下,各种取代的1,2-二苯基-1 H-苯并[ d使咪唑平稳反应,并以中等至优异的产率生成所需的取代的咪唑。