Chinese Journal of Organic Chemistry ›› 2024, Vol. 44 ›› Issue (10): 3233-3240.DOI: 10.6023/cjoc202405049 Previous Articles     Next Articles

Special Issue: 二氧化碳专题合集

ARTICLES

硼促进Co催化使用CO2和H2实现仲芳香胺N-甲基化

石亲a,b, 李臻a, 何林a,*(), 李玉东a,*(), 李跃辉c,*()   

  1. a 中国科学院兰州化学物理研究所 低碳催化与二氧化碳利用国家重点实验室(筹) 羰基合成与选择氧化国家重点实验室 兰州 730000
    b 中国科学院大学 北京 100049
    c 上海交通大学 国家电投智慧能源创新学院 上海 200240
  • 收稿日期:2024-05-31 修回日期:2024-07-16 发布日期:2024-08-16
  • 基金资助:
    国家自然科学基金(22022204); 国家自然科学基金(22102197); 江苏省国家自然基金(BK20211096); 江苏省国家自然基金(BK20211093)

Boron-Promoted Co-Catalyzed N-Methylation of Secondary Aromatic Amines with CO2 and H2

Qin Shia,b, Zhen Lia, Lin Hea,*(), Yudong Lia,*(), Yuehui Lic,*()   

  1. a State Key Laboratory of Low Carbon Catalysis and Carbon Dioxide Utilization; State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000
    b University of Chinese Academy of Sciences, Beijing 100049
    c College of Smart Energy, Shanghai Jiao Tong University, Shanghai 200240
  • Received:2024-05-31 Revised:2024-07-16 Published:2024-08-16
  • Contact: *E-mail: liyuehui@sjtu.edu.cn;liyd@ms.xjb.ac.cn;helin@licp.cas.cn
  • Supported by:
    National Natural Science Foundation of China(22022204); National Natural Science Foundation of China(22102197); National Science Foundation of Jiangsu Province(BK20211096); National Science Foundation of Jiangsu Province(BK20211093)

Development of catalytic methods using CO2/H2 as methylating reagent for selective methylation of amines is highly attractive. Herein, the methylation of N—H bond via boron promoted activation of Co-formate intermediates is reported. This catalytic system showed excellent functional group tolerance with high catalytic activity, and a series of methylated products were acquired in moderate to excellent yields under mild conditions (e.g. 80 ℃ or 60 ℃). It was inferred that imine complex C was the crucial intermediate formed via dehydration of species B, providing efficient C—N coupling for the selective N-methylation of secondary aromatic amines with CO2/H2.

Key words: CO2/H2, N-methylation, cobalt catalysis