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Polyphenols from peanut skins and their free radical-scavenging effects.
Phytochemistry. 2004 Aug; 65(16):2391-9.P

Abstract

Separation of the water-soluble fraction of peanut skins led to the isolation of five proanthocyanidins. Based on the spectroscopic investigation and partial acid catalyzed degradation, their structures were determined to be epicatechin-(2beta-->O -->7, 4beta -->6)-[epicatechin-(4beta-->8)]-catechin (1), epicatechin-(2beta-->O -->7, 4beta-->8) epicatechin-(4beta-->8)-catechin-(4alpha-->8)-epicatechin (2), and procyanidins B2 (3), B3 (4) and B4 (5). The absolute configuration of the new compounds was determined from their circular dichroism curves and the (1)H NMR spectra of analysis of flavan-3-ols formed by thiolytic degradation of 1 and 2 in the presence of a chiral dirhodium complex (dirhodium tetra-(R)-(trifluoromethyl) phenyl acetate).

Authors+Show Affiliations

Lou H
School of Pharmaceutical Sciences, Shandong University, Jinan 250012, PR China. louhongxiang@sdu.edu.cn
Yuan H
No affiliation info available
Ma B
No affiliation info available
Ren D
No affiliation info available
Ji M
No affiliation info available
Oka S
No affiliation info available

MeSH

AntioxidantsArachisBiflavonoidsCatechinCircular DichroismFlavonoidsFree Radical ScavengersMagnetic Resonance SpectroscopyPhenolsPolyphenolsProanthocyanidinsRhodiumSulfhydryl Reagents

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

15381013

Citation

Lou, Hongxiang, et al. "Polyphenols From Peanut Skins and Their Free Radical-scavenging Effects." Phytochemistry, vol. 65, no. 16, 2004, pp. 2391-9.
Lou H, Yuan H, Ma B, et al. Polyphenols from peanut skins and their free radical-scavenging effects. Phytochemistry. 2004;65(16):2391-9.
Lou, H., Yuan, H., Ma, B., Ren, D., Ji, M., & Oka, S. (2004). Polyphenols from peanut skins and their free radical-scavenging effects. Phytochemistry, 65(16), 2391-9.
Lou H, et al. Polyphenols From Peanut Skins and Their Free Radical-scavenging Effects. Phytochemistry. 2004;65(16):2391-9. PubMed PMID: 15381013.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Polyphenols from peanut skins and their free radical-scavenging effects. AU - Lou,Hongxiang, AU - Yuan,Huiqing, AU - Ma,Bin, AU - Ren,Dongmei, AU - Ji,Mei, AU - Oka,Syuichi, PY - 2003/07/03/received PY - 2004/05/03/revised PY - 2004/9/24/pubmed PY - 2005/2/8/medline PY - 2004/9/24/entrez SP - 2391 EP - 9 JF - Phytochemistry JO - Phytochemistry VL - 65 IS - 16 N2 - Separation of the water-soluble fraction of peanut skins led to the isolation of five proanthocyanidins. Based on the spectroscopic investigation and partial acid catalyzed degradation, their structures were determined to be epicatechin-(2beta-->O -->7, 4beta -->6)-[epicatechin-(4beta-->8)]-catechin (1), epicatechin-(2beta-->O -->7, 4beta-->8) epicatechin-(4beta-->8)-catechin-(4alpha-->8)-epicatechin (2), and procyanidins B2 (3), B3 (4) and B4 (5). The absolute configuration of the new compounds was determined from their circular dichroism curves and the (1)H NMR spectra of analysis of flavan-3-ols formed by thiolytic degradation of 1 and 2 in the presence of a chiral dirhodium complex (dirhodium tetra-(R)-(trifluoromethyl) phenyl acetate). SN - 0031-9422 UR - https://www.unboundmedicine.com/medline/citation/15381013/Polyphenols_from_peanut_skins_and_their_free_radical_scavenging_effects_ DB - PRIME DP - Unbound Medicine ER -