## Abstract Carbon‐13 NMR spectra of a number of (−)‐__ent__‐kauranoids have been studied. An unambiguous selfconsistent assignment of resonances has been made by considering the changes in chemical shifts produced by the change of substituent(s).
C12 stereochemistry of α- and β-levantenolide carbon-13 NMR spectra of labdanolic diterpenes
✍ Scribed by AG González; CG Francisco; R Freire; R Hernández; JA Salazar; E Suárez
- Book ID
- 104225633
- Publisher
- Elsevier Science
- Year
- 1976
- Tongue
- French
- Weight
- 109 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0040-4039
No coin nor oath required. For personal study only.
✦ Synopsis
From Turkish tobacco Giles and Schumacher 1. isolated the two diterpene lactones J-and CTlevantenolide, for which they proposed structures 1 and 2 respectively on the bases of chemical degradative work and spectral data.
📜 SIMILAR VOLUMES
The 13CNMR spectra of a series of nine taxane derivatives are reported. A detailed analysis of the assignments is presented. Observed long-range substituent effects are explained on the basis of the proximity of rings A and C in this type of molecules.
## Abstract The complete ^1^H and ^13^C chemical shift assignments of the 13α‐epimer of estrone methyl ether and of estrone methyl ether itself were carried out, making use of one‐ and two‐dimensional NMR techniques (1D HOHAHA, COSY, NOESY, TOCSY and HSQC). Copyright © 2001 John Wiley & Sons, Ltd.