## Abstract The initial assignments for Cβ6 and Cβ8 in the carbon spectrum of estrone [3βhydroxyestraβ1,3,5(10)βtrieneβ17βone] were reversed by a subsequent group of investigators. Recent respected reference publications have reproduced these conflicting sets of data, reflecting an uncertainty rega
The assignment of 13C NMR shift data in clerodanes and related structures
β Scribed by J. M. Luteijn; A. Van Veldhuizen; A. De Groot
- Publisher
- John Wiley and Sons
- Year
- 1982
- Tongue
- English
- Weight
- 232 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0749-1581
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β¦ Synopsis
Abstract
The ^13^C NMR spectra of a number of partial clerodane structures and analogous compounds were recorded. The information thus obtained enabled the assignment of the ^13^C NMR shifts in a number of naturally occurring clerodanes.
π SIMILAR VOLUMES
## Abstract Unambiguous and complete assignments of ^1^H and ^13^C NMR chemical shifts for five clerodane diterpenes, four of them isolated from __Salvia splendens__ (salviarin, splendidin and splenolides A and B) and one obtained by acetylation of splenolide A, are presented. The assignments are b
Despite the large number of clerodanes isolated as natural products in the last decade, the correct 13C NMR chemical shift assignments of some carbons are still in doubt. In order to provide unambiguous assignments of the chemical shifts of clerodane diterpenes, a complete 13C NMR spectral analysis
## Abstract This article presents the structure elucidation of four new compounds, formed during the hemisynthetic preparation of trabectedin, an antiβtumor natural product from __Ecteinascidia turbinata__. We report herein on the use of UV, MS and NMR spectroscopic data along with ^1^H and ^13^C s
## Abstract Six flavone derivatives were studied. Previously reported NMR data of three of these derivatives were corrected and the NMR data for the other three derivatives not studied previously were completely assigned on the basis of the basic 1D and 2D NMR experiments and molecular modeling. Co