有机化学 ›› 2011, Vol. 31 ›› Issue (10): 1687-1689. 上一篇    下一篇

研究简报

一种合成N-苯基苯并咪唑的新方法

杨祺,和潇夏,常姣,吴群,张变香*   

  1. (山西大学化学化工学院 太原 030006)
  • 收稿日期:2011-01-14 修回日期:2011-04-15 发布日期:2011-05-18
  • 通讯作者: 杨祺 E-mail:2005290049@email.sxu.cn

A Novel Method for the Synthesis of N-Phenylbenzoimidazole

YANG Qi, HE Xiao-Xia, CHANG Jiao, WU Qun, ZHANG Bian-Xiang   

  1. (School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006)
  • Received:2011-01-14 Revised:2011-04-15 Published:2011-05-18

成功开发出一种直接合成N-苯基苯并咪唑的新方法. 在不使用金属催化剂与强碱的条件下, 通过苯并咪唑与二苯基碘三氟甲磺酸盐的反应合成了目标化合物, 采用1H NMR与13C NMR技术对目标化合物进行了表征, 并确定了最佳反应条件. 在苯并咪唑与二苯基碘三氟甲磺酸盐的物质的量比为1∶1.2、溶剂乙醇/二甲苯的体积比为1∶4、反应温度为120 ℃、反应时间为24 h的最佳反应条件下, 使目标化合物的产率达到了52.0%, 并回收了等量的碘苯. 此外, 通过高效液相色谱技术进行跟踪监测, 对该反应的机理进行了探讨.

关键词: N-苯基苯并咪唑, 苯并咪唑, 二苯基碘三氟甲磺酸盐

In this study, a novel method for the direct synthesis of N-phenylbenzoimidazole was successfully developed. The title compound was synthesized via the reaction of benzimidazole with diphenylene io-donium trifluoromethanesulfonate without any metal catalysts and strong alkali. The title compound was characterized by 1H NMR and 13C NMR spectra, and the optimal reaction conditions were determined. At the molar ratio of 1∶1.2 of benzimidazole to diphenylene iodonium trifluoromethanesulfonate, volume ratio of 1∶4 of ethanol to xylene, and at the reaction temperature of 120 ℃, the yield of the title compound N-phenylbenzoimidazole was up to 52.0% in 24 h, and the equal amount of iodine benzene was recycled. In addition, the proposed reaction mechanism was studied by HPLC technique.

Key words: 1-phenyl-1H-benzoimidazole, benzimidazole, diphenylene iodonium trifluoromethanesulfonate

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