OLIGOMERIC FLAVANOIDS .18. DIMERIC PROROBINETINIDINS FROM ROBINIA-PSEUDACACIA

被引：15

作者：

COETZEE, J ^{[1
]}

STEYNBERG, JP ^{[1
]}

STEYNBERG, PJ ^{[1
]}

BRANDT, EV ^{[1
]}

FERREIRA, D ^{[1
]}

机构：

[1] UNIV ORANGE FREE STATE,DEPT CHEM,BLOEMFONTEIN 9300,SOUTH AFRICA

来源：

TETRAHEDRON | 1995年 / 51卷 / 08期

关键词：

D O I：

10.1016/0040-4020(94)01091-D

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

The range of naturally occurring prorobinetinidins is extended by characterization of the novel robinetinidol-leucorobinetinidins 3, 5, 7, and 9, the robinetinidol-dihydrorobinetins 11, 13, and 15, a robinetinidol-robinetin 17, and a robinetinidol-flavone analogue 19. The diversity regarding the oxidation level of the chain terminating moieties suggests that the biflavanoids in Robinia pseudacacia may be interrelated via oxidation/reduction of these units. The conspicuous absence of the effects of dynamic rotational isomerism about the interflavanyl bond in the H-1 NMR spectra of some of the derivatives is explained in terms of a preferred conformation of this bond rather than to 'free rotation'.

引用

页码：2339 / 2352

页数：14

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