The 13C NMR spectra of some hydmxylated e n t -k a m e diterpenoids were measured in CDC13-Py-4 (1 : 1) solutiou and also after addition of boric acid. Complexation of ent-3P,l8-, ent-7a;15&, ent-7a,l5cu-, ent-l5B,16B-and ent-16B,17-dihydroq derivatives with boric acid produced considerable chemical
Complete 13C NMR assignments for ent-kaurane diterpenoids from Sideritis species
✍ Scribed by Belkıs Halfon; Ahmet Ceyhan Gören; Abdülselam Ertaş; Gülaçtı Topçu
- Book ID
- 102525994
- Publisher
- John Wiley and Sons
- Year
- 2011
- Tongue
- English
- Weight
- 103 KB
- Volume
- 49
- Category
- Article
- ISSN
- 0749-1581
- DOI
- 10.1002/mrc.2747
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✦ Synopsis
Abstract
In this work, the detailed NMR studies and full ^13^C NMR assignments for five diterpenoids isolated from Sideritis caesarea and Sideritis athoa are described. The assignments are based on a combination of 1D and 2D NMR techniques including ^1^H, ^13^C, ^1^H^1^H COSY, gHSQC [^1^J(C,H)] and gHMBCδ~C~ [^n^J(C,H) (n = 2 and 3)] and NOESY experiments. Copyright © 2011 John Wiley & Sons, Ltd.
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