𝔖 Bobbio Scriptorium
✦   LIBER   ✦

1H and 13C NMR assignments of abietane diterpenes from Aegiphila lhotzkyana

✍ Scribed by Maria Claudia Pinheiro Barros; Mary Anne Sousa Lima; Raimundo Braz-Filho; Edilberto Rocha Silveira

Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
100 KB
Volume
41
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

An NMR study of one new and several known abietane diterpenes isolated from the roots of Aegiphila lhotzkyana is described. In addition to 1D NMR, several 2D shift‐correlated NMR pulse sequences (^1^H–^1^H‐COSY, NOESY, HMQC and HMBC) were used to establish all the structures, and unambiguously perform the ^1^H and ^13^C chemical shift assignments of the new natural diterpene and three derivatives, the NMR data for which have not been reported previously. Revision of current data assignment for teuvincenone H is also suggested. Copyright © 2003 John Wiley & Sons, Ltd.

📜 SIMILAR VOLUMES

1H and 13C NMR spectral assignments of s
1H and 13C NMR spectral assignments of some natural abietane diterpenoids
✍ Benjamín Rodríguez 📂 Article 📅 2003 🏛 John Wiley and Sons 🌐 English ⚖ 112 KB 👁 1 views

## Abstract An NMR study of 11 naturally occurring abietane diterpenoids is described. In addition to one‐dimensional NMR methods, including DPFGSE 1D‐NOE spectra, two‐dimensional shift‐correlated experiments [^1^H,^1^H COSY, ^1^H,^13^C‐gHSQC ^1^__J__(C,H) and ^1^H,^13^C‐gHMBC ^__n__^__J__(C,H) (__

Complete 1H and 13C NMR assignment of a
Complete 1H and 13C NMR assignment of a kaurane diterpene from Piliostigma thonningii
✍ M.-T. Martin; M. Païs; A. O. Ogundaini; J. C. Ibewuilke; F. O. Ogungbamila 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 232 KB 👁 2 views

The diterpene ent-16a-hydroxykauran-18-oic acid was isolated from the leaves of Piliostigma thonningii. Structural elucidation and complete 1H and 13C NMR chemical shift assignments of this compound were achieved by 2D experiments.

Complete assignments of the 1H and 13C N
Complete assignments of the 1H and 13C NMR spectra of five rearranged abietane diterpenoids
✍ Benjamín Rodríguez 📂 Article 📅 2002 🏛 John Wiley and Sons 🌐 English ⚖ 86 KB 👁 1 views

## Abstract An NMR study of five highly functionalized and rearranged abietane diterpenoids is described. In addition to 1D NMR methods, including 1D NOESY spectra, 2D shift‐correlated experiments [^1^H, ^13^C‐gHSQC‐^1^__J__ (C,H) and ^1^H, ^13^C‐gHMBC‐^__n__^__J__ (C,H) (__n__ = 2 and 3)] were use

13C NMR assignments and conformational e
13C NMR assignments and conformational evaluation of diterpenes from Croton sarcopetalus Muell.
✍ C. S. de Heluani; C. A. N. Catalán; L. R. Hernández; E. Burgueño-Tapia; P. Josep 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 102 KB 👁 1 views

The known diterpenes junceic acid (1) and the stress metabolite derivatives 2È4 were isolated from the hexane extracts of the roots of Croton sarcopetalus Muell. The complete 13C NMR chemical shift assignments of these compounds were achieved with the aid of DEPT and HETCOR experiments.

Complete 1H and 13C NMR assignments of c
Complete 1H and 13C NMR assignments of chamigrenes from Aplysia dactilomela
✍ Carlos R. Kaiser; Liane F. Pitombo; Angelo C. Pinto 📂 Article 📅 2001 🏛 John Wiley and Sons 🌐 English ⚖ 162 KB

## Abstract Stereochemical evaluation and complete ^1^H and ^13^C NMR assignment of the chamigrenes johnstonol (**1**), pacifenediol (**2**), pacifidiene (**3**), pacifenol (**4**), isolated from the Brazilian mollusc __Aplysia dactilomela__, were performed using 2D NMR techniques including COSY, N

1H and 13C NMR signal assignments of a n
1H and 13C NMR signal assignments of a novel Baeyer–Villiger originated diterpene lactone
✍ Henriete S. Vieira; Jacqueline A. Takahashi; A. A. Leslie Gunatilaka; Maria Amél 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 127 KB

A highly rearranged novel dilactone was the single product isolated from Baeyer-Villiger oxidation of a norketone prepared from grandiflorenic acid, a natural kaurane diterpene. The complete 1H and 13C NMR assignment is presented for this novel compound that showed discrete in vitro antibacterial ac