Citation:
MENG Xin, ZHOU Chang-Lu, XIN Zhong. Structural Effect of Benzofuranone Derivatives on the Scavenging Ability for 2,2-Diphenyl-1-picrylhydrazl[J]. Chinese Journal of Applied Chemistry,
;2009, 26(6): 1409-1413.
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The structural effect of benzofuranone derivatives on their ability to scavenge 2,2-diphenyl-1-picrylhydrazl(DPPH) was studied via radical colorimetry.The results show that the changes of methyl and tert-butyl groups on 5 and 7 positions of mother benzene ring of benzofuranone and the presence of strong electron-donating substituent in substituted benzene ring have little influences on the ability of benzofuranone derivatives scavenging DPPH.Substituent of 2'-position prevents the attack of benzofuranone toward radicals,which weak the scavenging ability of benzofuranone derivatives for DPPH.And the scavenging ability of benzofuranone for DPPH will be weakened further when the substituent of 2'-position is without reactive hydrogen and can form hydrogen bonds with 3-reactive hydrogen.When the substituent of 2'-position is with reactive hydrogen,the reactive hydrogen will be activated due to the formation of hydrogen bonding between substituted group with 3-reactive hydrogen,and the position hindrance will be generated in a great extent.
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Keywords:
- DPPH,
- benzofuranones,
- antioxidant activity,
- scavenging ability
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