title: Feruloylacetone as the model compound of half-curcumin: synthesis and antioxidant properties.
abstract: In order to clarify the contribution of phenolic and enolic hydroxyl group to the antioxidant capacity of feruloylacetone, a model compound of half-curcumin, 6-(p-hydroxy-m-methoxyphenyl)-5-hexene-2,4-dione (FT), 6-(p-benzyloxy-m-methoxyphenyl)-5-hexene-2,4-dione (BMFT), 6-(m,p-dihydroxyphenyl)-5-hexene-2,4-dione (DDFT), 6-(p-hydroxy-m-methoxyphenyl)hexane-2,4-dione (DHFT), 6-(p-hydroxy-m-methoxyphenyl)-5-hexene-2,4-diol (THFT), and ethyl 2-(p-hydroxy-m-methoxybenzylidene)-3-oxobutanoate (EOFT) were synthesized. The radical-scavenging abilities of these compounds were tested by trapping 2,2'-azinobis(3-ethylbenzothiazoline-6-sulfonate) cationic radical (ABTS(+·)), 2,2'-diphenyl-1-picrylhydrazyl (DPPH), and galvinoxyl radicals. The reductive capacities were screened by quenching singlet oxygen and by inhibiting the oxidation of linoleic acid. They were also employed to inhibit the oxidation of DNA mediated by hydroxyl radical and 2,2'-azobis(2-amidinopropane hydrochloride) (AAPH). In addition, they were applied to protect erythrocytes against AAPH- and hemin-induced hemolysis. The obtained results revealed that the antioxidant capacity of half-curcumin was derived from the phenolic-OH and the conjugated linkage between phenolic and enolic-OH. The enolic-OH itself cannot trap radicals.
authors.affiliation: Department of Organic Chemistry, College of Chemistry, Jilin University, No 2519 Jiefang Road, Changchun 130021, China.
authors.forename: Jian-Ying
authors.initials: JY
authors.lastname: Feng
authors.forename: Zai-Qun
authors.initials: ZQ
authors.lastname: Liu
mesh_terms: D000096:Acetone / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology*; D000578:Amidines / Q000494:pharmacology; D003300:Copper / Q000737:chemistry / Q000494:pharmacology; D003474:Curcumin / Q000737:chemistry*; D004247:DNA / Q000378:metabolism; D004912:Erythrocytes / Q000187:drug effects; D016166:Free Radical Scavengers / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology*; D005609:Free Radicals / Q000737:chemistry; D005978:Glutathione / Q000737:chemistry / Q000494:pharmacology; D006427:Hemin / Q000494:pharmacology; D006461:Hemolysis / Q000187:drug effects; D006801:Humans; D008041:Linoleic Acids / Q000737:chemistry; D010084:Oxidation-Reduction / Q000187:drug effects; D013329:Structure-Activity Relationship; D013343:Styrenes / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology*; D019207:beta Carotene / Q000737:chemistry
chemical_list: D000578:Amidines; D016166:Free Radical Scavengers; D005609:Free Radicals; D008041:Linoleic Acids; D013343:Styrenes; C558588:feruloylacetone; D019207:beta Carotene; D000096:Acetone; C005575:methyl linoleate; C046728:2,2'-azobis(2-amidinopropane); D006427:Hemin; D003300:Copper; D004247:DNA; D005978:Glutathione; D003474:Curcumin