STRUCTURE DETERMINATION OF NEW IRIDALS FROM IRIS-PALLIDA AND IRIS-FOETIDISSIMA

被引：25

作者：

LITTEK, A ^{[1
]}

MARNER, FJ ^{[1
]}

机构：

[1] UNIV COLOGNE,INST BIOCHEM,ZULPICHER ST 47,W-5000 COLOGNE 41,GERMANY

来源：

HELVETICA CHIMICA ACTA | 1991年 / 74卷 / 08期

关键词：

D O I：

10.1002/hlca.19910740838

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The four novel iridals 8-10 and 18 were isolated from rhizome extracts of Irish pallida and Iris foetidissima, and their structures were established by spectroscopic methods and oxidative degradation. The compounds 8-10 bearing a conjugated triene moiety are extremely labile and decompose rapidly. Thus, the monocyclic triene 8 was only isolated after its conversion to a Diels-Alder with 4-phenyl-3H-1,2,4-triazole-3,5(4H)-dione (14). The tricyclic iridal 18 is a hitherto unknown precursor of alpha-irone. The possible biogenesis of these unusual triterpenoids is discussed.

引用

页码：2035 / 2042

页数：8

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