A NEW SYNTHESIS OF XANTHONES - 2,4,7-TRICHLORONORLICHEXANTHONE AND 4,5,7-TRICHLORONORLICHEXANTHONE, 2 NEW LICHEN XANTHONES

被引：23

作者：

ELIX, JA

JIANG, H

WARDLAW, JH

机构：

[1] Chemistry Department, Australian National University, Canberra, ACT, 2601

来源：

AUSTRALIAN JOURNAL OF CHEMISTRY | 1990年 / 43卷 / 10期

关键词：

D O I：

10.1071/CH9901745

中图分类号：

O6 [化学];

学科分类号：

0703 [化学];

摘要：

A new synthetic route to norlichexanthone (1, 3, 6-trihydroxy-8-methyl-9H-xanthen-9-one) derivatives has been developed by using a Smiles rearrangement of an appropriately substituted depside in the key step. 2, 4, 7-Trichloronorlichexanthone (22) and 4, 5, 7- trichloronorlichexanthone (29) have been prepared by this method. The former xanthone (22) was shown to be a constituent of the lichens Lecanora sulphurata and L flavo-pallescens and the latter (29) a constituent of Micarea austroternaria var. isabellina. © 1990 ASEG.

引用

页码：1745 / 1758

页数：14

共 21 条

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[2]

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[3]

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[4]

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