Chemical Research in Chinese Universities ›› 2023, Vol. 39 ›› Issue (6): 933-947.doi: 10.1007/s40242-022-2289-1

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Electrophilic Halogen Reagents-mediated Halogenation: Synthesis of Halogenated Dihydro-1,3-oxazine Derivatives

QI Liang1, QIN Yuji2, WANG Xueqing1, CHAI Hongli3, ZHU Weiwei2, and ZHOU Yifeng1   

  1. 1. Department of Pharmacy, College of Life Sciences, China Jiliang University, Hangzhou 310018, P.R. China;
    2. School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P.R. China;
    3. School of Basic Medical Science, Lanzhou University, Lanzhou 730000, P.R. China
  • Received:2022-09-21 Online:2023-12-01 Published:2023-11-18
  • Contact: ZHOU Yifeng, ZHU Weiwei E-mail:zhouyifeng@cjlu.edu.cn;zhuww8@mail.sysu.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (No.22108264).

Abstract: Halogenation of N-cinnamylbenzamides and N-[(2H- chromen-3-yl)methyl]benzamides using electrophilic halogen source was reported. Various halogenated dihydro- 1,3-oxazine derivatives (45 examples) were synthesized in high to excellent yields (up to 98% yields), as well as halogenated dihydrochromeno-1,3-oxazine derivatives (56 examples, up to 96% yields). The properties of mild conditions, metal-free and high efficiency of the reaction made it a promising strategy in future applications for the construction of carbon-halogen (fluorine, F; chlorine, Cl; bromine, Br; iodine, I) bond and 1,3-oxazine derivatives.

Key words: Carbon halogen bond, 1,3-Oxazine, Heterocyclization