Online article for Non-subscribers

Pay per view

Heterocycles has a pay-per-view service for Non-subscribers.
You will be able to directly purchase the full text article through PayPal.
Your purchased Paper can be downloaded after the payment is completed.
An e-mail will be sent the URL to download the paper.
If you have any questions, please contact: purchase@heterocycles.com

Price: ¥ 4,320 (Yen only)
Period: This Article can be accessed for 7 days.

Paper | Regular issue | Vol 32, No. 3, 1991, pp.499-510
Published online, 1st January, 1970
DOI: 10.3987/COM-91-5661
Revised Structures of Albanins D and E, Geranylated Flavones from Morus alba

Toshio Fukai and Taro Nomura*

*Faculty of Pharmaceutical Sciences, Toho University, 2-2-1, Miyama, Funabashi, Chiba 274-8510, Japan

Abstract

The chemical shifts of the proton signals of the hydrogen-bonded hydroxyl groups of albanins D and E, isolated from Morus alba L. (Moraceae), were compared with those of the hydroxyl groups of 6- or 8-isoprenoid substituted flavones to doubt the location of the geranyl groups of albanins D and E. The proposed structures (3) and (4) for albanins D and E were revised to the structures (1) and (2), respectively, on the basis of the syntheses of 6-geranylated flavones (1 and 2) and 8-geranylated flavones (3 and 4).