Chinese Journal of Magnetic Resonance

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PHOTOCHEMISTRY OF AMINO SUBSTITUTED ELSINOCHROME A: ESR STUDY ON THE PHOTOGENERATION OF ACTIVE RADICAL SPECIES

CHEN Yong-kuan1, LI Cong2, TAI Hong3, CHEN Yuan-teng1, GU Kun2, WANG Hang-qing1*   

  1. 1.State Key Laboratory of OSSO, Lanzhou Institute of Chemistry Physics, The Chinese Academy of Sciences, Lanzhou 730000, China; 
    2.Department of Application Chemistry, Yunnan University, Kunming 650091, China;
    3.Department of Clinical Laboratory, First Peoples Hospital of Yunnan Province, Kunming 650032, China
  • Received:2002-12-05 Revised:2003-01-13 Published:2003-06-05 Online:2003-06-05
  • About author:CHEN Yong-kuan(1966-), male,Zhejiang,S.M.,Senior Engineer,now engaging in the study on the separating and identifying of natural products,Tel:0871-8325989,E-mail:xlzxchen@public.km.yn.cn. *Correspondence author: State Key Lab of OSSO,Lanzhou Institute of Chemistry Physics,CAS,730000,China Tel: 0931-8277621.
  • Supported by:

    Natural Science Foundation of Yunnan Province (2000C0106M) and National Natural Science Foundation of China (20262007).

Abstract:

A filamentous fangus Ascomyceters Hypocreaceae Hypomyces (Fr.) Ful SP. was obtained from the western mountainous area of Yunnan province of China, and cultured in the laboratory. A chemical component of the metabolite of the fungus had been identified as Elsinochrome A (EA) by UV spectrum, elemental analysis, MS, 1H NMR, 13C NMR and X-ray analysis. Under appropriate conditions, the chloroform solution of EA was mixed with the chloroform solution of dibenzylamine (DBA). Irradiation of the mixed compound with a visible-light exhibits stronger absorption as observed by  a Varian E-115 ESR measurement. The results suggest that EA cause  DBA to  convert to oxynitride radical.

Key words: ESR, Elsinochrome A, Photochemistry, Biosynthesis

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