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:

Price: ¥ 4,400 (Yen only)
Period: This Article can be accessed for 7 days.

Paper | Regular issue | Vol 34, No. 6, 1992, pp.1213-1225
Published online, 1st January, 1970
DOI: 10.3987/COM-92-6026
1H Nmr Chemical Shift of the Flavonol 5-Hydroxy Proton as a Characterization of 6- or 8-Isoprenoid Substitution

Toshio Fukai and Taro Nomura*

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


1H Nmr examination of 6- or 8-isoprenoid substituted flavonols has shown that the location of isoprenoid side chain on A ring can be deduced from the chemical shift of the 5-hydroxy proton. The application of this 1H nmr technique to identification of the isoprenoid substituted flavonols is discussed. The proposed structures for glepidotin A and two flavonols were revised with this method as well as chemical method.