Chemical Research in Chinese Universities ›› 2018, Vol. 34 ›› Issue (2): 197-202.doi: 10.1007/s40242-018-7298-8

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Microwave-assisted Synthesis of New 1,2,3-Triazoles Bearing an Isoxazole Ring by the Azide-alkyne Cycloaddition Click Chemistry

LI Jing1, LIU Hongwei1, MENG Fanyu1, YAN Liuqing1, SHI Yanpeng1, ZHANG Yumin1,2, GU Qiang1,2   

  1. 1. College of Chemistry, Jilin University, Changchun 130012, P. R. China;
    2. National-Local Joint Engineering Laboratory of In-situ Conversion, Drilling and Exploitation Technology for Oil Shale, Changchun 130021, P. R. China
  • Received:2017-09-07 Revised:2017-11-03 Online:2018-04-01 Published:2017-12-04
  • Contact: GU Qiang,E-mail:guq@jlu.edu.cn E-mail:guq@jlu.edu.cn

Abstract: A comparison synthesis of 1,2,3-triazoles bearing isoxazole ether was developed between conventional and microwave-assisted heating. Single/double 1,2,3-triazoles bearing isoxazole ether were synthesized by click reaction starting from substituted isoxazolyl alkyne compounds and substituted benzyl azide compounds or neopentylglycol diazide in the presence of copper(I) that in-situ generated. Herein, the effect of different catalysts on the yield was researched by conventional method, and the optimal catalyst was selected. The structures of all the synthesized compounds were confirmed by MS, FTIR, 1H and 13C NMR spectroscopies. Moreover, the crystal structure of 5-{[(1-benzyl-1H-1,2,3-triazol-4-yl)methoxy]methyl}-3-(4-fluorophenyl)isoxazole(2h) was determined.

Key words: Microwave-assisted heating, 1,2,3-Triazole, Isoxazole, Azide-alkyne, Click chemistry