Chemical Research in Chinese Universities ›› 2015, Vol. 31 ›› Issue (4): 526-533.doi: 10.1007/s40242-015-5191-2

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Design and Synthesis of 3-Triazolo-coumarins and Their Applications in Scavenging Radicals and Protecting DNA

LIU Zhihui1, WANG Yingnan2, SUN Jingbo2, YANG Yang2, LIU Qingwen2, LIU Zaiqun2, SONG Zhiguang2   

  1. 1. Hospital of Stomatology, Jilin University, Changchun 130021, P. R. China;
    2. Department of Organic Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
  • Received:2015-05-11 Revised:2015-06-04 Online:2015-08-01 Published:2015-06-16
  • Contact: SONG Zhiguang E-mail:szg@jlu.edu.cn
  • Supported by:

    Supported by the National Natural Science Foundation of China(No.90813003).

Abstract:

In this study, we synthesized a series of 3-triazolo-coumarins and evaluated their antioxidant activities respectively by two methods: trapping 2,2'-azinobis(3-ethylbenzothiazoline-6-sulfonate) cationic radical(ABTS) and oxidation of DNA which was induced by Cu2+/glutathione(GSH), ·OH and 2,2'-azobis(2-amidinopropane hydrochloride)(AAPH). Among the nine 3-triazolo-coumarins, compounds 6c and 6f―6i were synthesized for the first time, which exhibited the capability of terminating radical propagation-chains in oxidation of DNA induced by AAPH. In this study, we found that phenethylamine moiety, hydroxyl and ortho-methoxy are the key groups to enhance the antioxidant activities of compounds.

Key words: 3-Triazolo-coumarin, Coumarin, Free radical, Oxidation, Antioxidant, DNA