有机化学 ›› 2020, Vol. 40 ›› Issue (7): 1991-1998.DOI: 10.6023/cjoc202003020 上一篇    下一篇

研究论文

负载纳米钯颗粒在邻位导向磺化反应中的催化特性探究

李鹏帅, 乌云, 白朝鲁门, 包永胜   

  1. 内蒙古师范大学化学与环境科学学院 内蒙古绿色催化重点实验室 呼和浩特 010022
  • 收稿日期:2020-03-08 修回日期:2020-04-11 发布日期:2020-04-30
  • 通讯作者: 包永胜 E-mail:sbbys197812@163.com
  • 基金资助:
    国家自然科学基金(No.21861030)和内蒙古自治区高等学校青年科技英才支持计划(No.NJYT-17-A22)资助项目.

Insight into Catalytic Properties of Supported Palladium Nanoparticles Catalyzed ortho-Directed Sulfonylation

Li Pengshuai, Wu Yun, Bai Chaolumen, Bao Yongsheng   

  1. Inner Mongolia Key Laboratory of Green Catalysis, College of Chemistry and Environmental Science, Inner Mongolia Normal University, Hohhot 010022
  • Received:2020-03-08 Revised:2020-04-11 Published:2020-04-30
  • Supported by:
    Project supported by the National Natural Science Foundation of China (No. 21861030), and the Program for Young Talents of Science and Technology in Universities of Inner Mongolia Autonomous Region (No. NJYT-17-A22).

报道了一种负载钯纳米颗粒催化2-苯基吡啶与芳磺酰氯的邻位导向磺化反应.对反应前后的负载钯纳米颗粒催化剂进行X射线光电子能谱(XPS)分析,发现反应后钯完全被氧化.结果证明钯催化的邻位导向磺化反应是经由PdⅡ/IV催化循环,而不是Pd0/Ⅱ催化循环.热过滤实验及其催化剂的表征进一步证明了这个假设,提供了在邻位导向磺化反应中确定钯价态变化的直接方法.

关键词: C—H功能化, 钯纳米颗粒催化剂, 磺化, XPS分析

Catalyzed by supported palladium nanoparticles, an ortho-directed sulfonylation reaction between 2-phenylpyri-dine and arylsulfonyl chlorides has been developed. The full oxidation-state change of palladium was detected in the X-ray photoelectron spectroscopy (XPS) analysis of the supported palladium nanoparticles catalyst before and after reaction, which confirmed that Pd-catalyzed ortho-directed sulfonylation reaction was performed via a PdⅡ/IV catalytic cycle instead of Pd0/Ⅱ. The hot filtration test and other tests of catalysts further confirmed the hypothesis. This report afforded the most straightforward approach to confirm the variation of valence of palladium in ortho-directed sulfonylation reaction.

Key words: C-H functionalization, X-ray photoelectron spectroscopy (XPS) analysis, palladium nanoparticles catalyst, sulfonylation