## 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
13C-NMR. Spectroscopy of Naturally Occurring Substances. XXXV. Labdanic diterpenes
✍ Scribed by Brian L. Buckwalter; Ivor R. Burfitt; Arthur A. Nagel; Ernest Wenkert; Ferdinand Näf
- Publisher
- John Wiley and Sons
- Year
- 1975
- Tongue
- German
- Weight
- 810 KB
- Volume
- 58
- Category
- Article
- ISSN
- 0018-019X
No coin nor oath required. For personal study only.
✦ Synopsis
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.
📜 SIMILAR VOLUMES
## 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
## 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
Ab&act-A carbon shift analysis of hibent, phyllocladene, isophyllocladene, cafestol. cafamarine. mascaroside and h~bane-like substances is presented
We wish to report the first natural abundance 13C nmr study of the prostaglandins, 3 chemical shift analysis of members of the PGE (!, 2&, PGF (a-12, and PGA (3 group and interpretation of the data in terms of the solution hehavior of these biologically important substances. T&l& Cmr Chemical Shifts
## 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