Abstract:
:Ascorbic acid, present in plasma from humans at concentrations of 50 to 200 mumol/l, has multiple antioxidant properties. Structural modification of this vitamin by the introduction of lipophilic moieties has allowed to the development of ascorbate esters and ethers active as free radical quenchers. Thus, a new series of ascorbic acid analogues possessing one or two aromatic rings was prepared in an attempt to synthesize potent antioxidants with lipophilic properties. Substituted 3-hydroxy furan-2 (5H)-ones and in some cases, dihydrofuro[3,4-b]pyrones were prepared. The synthesized compounds were evaluated for their antioxidant activity in vitro. So, 4-(4-methoxybenzoyl)-3-hydroxy-5-phenylfuran-2(5H)-one 3e (IC50 = 3.06 x 10(-4) M) was found to be the most effective in scavenging the superoxide anion, whereas 4-benzoyl-3-hydroxy-5-(3,4-dimethoxyphenyl)furan- 2(5H)-one 3d (IC50 = 1.38 x 10(-4) M) was the most active in inhibiting, lipid peroxidation.
journal_name
Biol Pharm Bulljournal_title
Biological & pharmaceutical bulletinauthors
Coudert P,Leal F,Duroux E,Rubat C,Couquelet Jdoi
10.1248/bpb.19.220subject
Has Abstractpub_date
1996-02-01 00:00:00pages
220-3issue
2eissn
0918-6158issn
1347-5215journal_volume
19pub_type
杂志文章abstract::Turnera ulmifolia is a plant belonging to the family Turneraceae, popularly known in Brazil as chanana. This species is distributed from Guyana to southern Brazil where it is considered a weed. The plant occurs in tropical rain forest, fields, and gardens. Chanana tea is used in Brazilian folk medicine for the treatme...
journal_title:Biological & pharmaceutical bulletin
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journal_title:Biological & pharmaceutical bulletin
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journal_title:Biological & pharmaceutical bulletin
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journal_title:Biological & pharmaceutical bulletin
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