Revised structures for senegalensin and euchrenone b10

被引：25

作者：

Tanaka, H

Doi, M

Etoh, H

Watanabe, N

Shimizu, H

Hirata, M

Ahmad, M

Qurashi, I

Khan, MR

机构：

[1] Meijo Univ, Fac Pharm, Tempa Ku, Nagoya, Aichi 4688503, Japan

[2] Osaka Kyoiku Univ, Takatsuki, Osaka 5691094, Japan

[3] Shizuoka Univ, Fac Agr, Shizuoka 4228529, Japan

[4] Gifu Pharmaceut Univ, Gifu 5028585, Japan

[5] Univ Karachi, Fac Pharm, Dept Pharmacognosy, Karachi 75270, Pakistan

来源：

JOURNAL OF NATURAL PRODUCTS | 2001年 / 64卷 / 10期

关键词：

D O I：

10.1021/np0101696

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Two prenylated isoflavones (1 and 2) with a hydroxyisopropyldihydrofuran moiety have been isolated from the wood of Erythrina suberosa var. glabrescence. The structure of compound I was in agreement with that of the previously reported senegalensin, isolated from the stem bark of Erythrina senegalensis. The structure of senegalensin was revised from structure 2 to structure I by spectroscopic means. Compound 2, the regioisomer of 1, was confirmed as euchrenone b(10) by comparison with the spectral data of the reported euchrenone b(10), isolated from the roots of Euchresta horsfieldii. The structure of 2 was established by 2D NMR spectroscopic analysis and by the X-ray crystallographic analysis of its p-bromobenzoyl derivative (2b).

引用

页码：1336 / 1340

页数：5