Structure and stereochemistry of triflavanoids containing both ether and carbon-carbon interflavanyl bonds

被引：7

作者：

Bennie, L

Coetzee, J

Malan, E

Ferreira, D ^{[1
]}

机构：

[1] Univ Mississippi, Pharmaceut Sci Res Inst, Natl Ctr Nat Prod Res, Sch Pharm, University, MS 38677 USA

[2] Univ Orange Free State, Dept Chem, ZA-9300 Bloemfontein, South Africa

来源：

PHYTOCHEMISTRY | 2001年 / 57卷 / 06期

基金：

新加坡国家研究基金会;

关键词：

Acacia caffra; Leguminosae; triflavanoids; pro-/leucoanthocyanidins; pro-/leucoteracacinidins; pro-/leucomelacacinidins; absolute configuration; reductive cleavage;

D O I：

10.1016/S0031-9422(01)00044-9

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

The first triflavanoids with both C-C and C-O-C interflavanyl bonds, epioritin-(4 beta -->6)-epioritin-(4 alpha -->4)-epioritin-4 beta -ol, epioritin-(4 beta -->3)-epioritin-(4 beta -->6)-epioritin-4 beta -ol and epioritin-(4 beta -->3)-epioritin-(4 beta --> 6)-epimesquitol-4 alpha -ol. were identified in the heartwood of Acacia caffra. The ethereal interflavanyl bond is readily susceptible to reductive cleavage with sodium cyanoborohydride in trifluoroacetic acid/dichloromethane which hence permits the unequivocal assignment of the absolute configuration of constituent flavanyl units. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：1023 / 1034

页数：12

共 25 条

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