Chinese Journal of Organic Chemistry ›› 2024, Vol. 44 ›› Issue (2): 573-583.DOI: 10.6023/cjoc202308011 Previous Articles     Next Articles



刘杰, 韩峰, 李双艳, 陈天煜, 陈建辉, 徐清*   

  1. 温州大学化学与材料工程学院 浙江温州 325035
  • 收稿日期:2023-08-12 修回日期:2023-10-11 发布日期:2023-10-30
  • 基金资助:
    国家自然科学基金(21672163); 及浙江省自然科学基金杰出青年基金(LR14B020002)

Transition Metal-Free Selective Aerobic Olefination of Methyl N-Heteroarenes with Alcohols

Jie Liu, Feng Han, Shuangyan Li, Tianyu Chen, Jianhui Chen, Qing Xu   

  1. College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035
  • Received:2023-08-12 Revised:2023-10-11 Published:2023-10-30
  • Contact: E-mail:
  • Supported by:
    National Natural Science Foundation of China(21672163); Natural Science Foundation of Zhejiang Province for Distinguished Young Scholars(LR14B020002)

By performing the reactions in the presence of adequate amount of air and a suitable base, selective olefination of methyl N-heteroarenes with alcohols can be effectively achieved without using any external catalyst. Control experiments revealed that, with adequate air, base can promote the aerobic oxidation of alcohols almost completely to carbonyl intermediates, which then condense with the methyl N-heteroarenes to afford the alkenyl N-heteroarene products. As the reaction is performed with adequate amount of air and a lower loading of the base at a lower temperature than that of the alkylation reaction, the generated alkenyl N-heteroarenes cannot be transfer hydrogenated to the alkylated products by the remained small amount of alcohol in the reaction mixture, which leads to a high selectivity of the olefination reaction. This method is thus a practical way for preparation of the alkenyl N-heteroarenes, being a complementary method to previous transition metal-free C-alkylation reaction of methyl N-heteroarenes with alcohols in the presence of small amount of air.

Key words: alcohol, olefination, methyl N-heteroarene, transition metal-free, alkenyl N-heteroarene