𝔖 Bobbio Scriptorium
✦   LIBER   ✦

13C nmr spectroscopy of tetracarbocyclic diterpenes and related substances

✍ Scribed by Do Khac Manh Duc; Marcel Fetizon; Sylvani Lazare; Peter K. Grant; Murray J. Nicholls; Henry T.L. Liau; Malcolm J. Francis; Jacques Poisson; Jean-Marie Bernassau; Nidia Franca Roque; Peter M. Wovkulich; Ernest Wenkert

Publisher
Elsevier Science
Year
1981
Tongue
French
Weight
322 KB
Volume
37
Category
Article
ISSN
0040-4020

No coin nor oath required. For personal study only.

✦ Synopsis

Ab&act-A carbon shift analysis of hibent, phyllocladene, isophyllocladene, cafestol. cafamarine. mascaroside and h~bane-like substances is presented

📜 SIMILAR VOLUMES

13C-NMR. Spectroscopy of Naturally Occur
13C-NMR. Spectroscopy of Naturally Occurring Substances. XXXV. Labdanic diterpenes
✍ Brian L. Buckwalter; Ivor R. Burfitt; Arthur A. Nagel; Ernest Wenkert; Ferdinand 📂 Article 📅 1975 🏛 John Wiley and Sons 🌐 German ⚖ 810 KB

## Abstract A total carbon shift analysis of several representatives of the labdane diterpene family of natural products is presented. The shift assignment is based on the prior shift designation of some synthetic trans‐decalin derivatives.

13C NMR spectroscopy of natural substanc
13C NMR spectroscopy of natural substances: IV—13C NMR studies of trachylobane diterpenes: Complete carbon assignment
✍ A. Arnone; R. Mondelli; J. St Pyrek 📂 Article 📅 1979 🏛 John Wiley and Sons 🌐 English ⚖ 322 KB

## Abstract The diterpene trachylobane and a series of derivatives have been completely analysed by FT ^13^C NMR spectroscopy. All ^13^C frequencies for trachylobanol have been unambiguously assigned by experimental techniques, i.e. by proton single‐frequency selective decoupling and shift reagent

13C-NMR. Spectroscopy of Naturally Occur
13C-NMR. Spectroscopy of Naturally Occurring Substances. XXXII. Vincaleucoblastine and related alkaloids
✍ Ernest Wenkert; Edward W. Hagaman; Bansi Lal; Gerald E. Gutowski; Allen S. Katne 📂 Article 📅 1975 🏛 John Wiley and Sons 🌐 German ⚖ 918 KB

## Abstract The total assignment of the ^13^C‐shifts of the complex Vinica rosea L. alkaloids vincaleucoblastine, leurosidine and leurosine and of a synthetic isomer of the latter is presented. The structure of leurosidine is corrected and a tentative structure for the acid‐catalyzed product of iso

13C-NMR. Spectroscopy of Naturally Occur
13C-NMR. Spectroscopy of Naturally Occuring Substances. XLII. Conformational analysis of quebrachamine-like indole alkaloids and related substances
✍ Ernest Wenkert; Edward W. Hagaman; Nicole Kunesch; Nai-yi Wang; Béla Zsadon 📂 Article 📅 1976 🏛 John Wiley and Sons 🌐 German ⚖ 858 KB

## Abstract The ^13^C shifts of 16α‐ and 16β‐substituted derivatives of quebrachamine, 14,15‐dehydroquebrachamine, cleavamine, 15,20α‐dihydrocleavamine and 15,20β‐dihydrocleavamine are determined and correlated with possible conformations of these tetracycles. The method of analysis of the C(16) co

13C-NMR. Spectroscopy of Naturally Occur
13C-NMR. Spectroscopy of Naturally Occurring Substances. XLV. Iboga Alkaloids
✍ Ernest Wenkert; David W. Cochran; Hugo E. Gottlieb; Edward W. Hagaman; Raimundo 📂 Article 📅 1976 🏛 John Wiley and Sons 🌐 German ⚖ 399 KB

## Abstract The carbon shifts of the Iboga‐type alkaloids catharanthine, voacangine, coronaridine, ibogaine, dihydrocatharanthine and epiibogamine were recorded and correlated with the conformation of the natural bases. A ^13^C‐NMR. analysis of heyneanine determined its C(19) configuration and a si

High-field 1H and 13C NMR spectroscopy o
High-field 1H and 13C NMR spectroscopy of some corticosteroids and related compounds
✍ Helmut Duddeck; Doris Rosenbaum; M. Hani; A. Elgamal; Mohamed B. E. Fayez 📂 Article 📅 1986 🏛 John Wiley and Sons 🌐 English ⚖ 621 KB

The 400.13MHz ' H and 100.6MHz uC NMR spectra of 12 corticosteroids and related compounds were investigated and the signals assigned by two-dimensional techniques. The effects of snbstituents, carbonyl groups and epoxide formation on the chemical shifts of both nuclei are discussed in terms of intra