Determination of the configuration of new 8,13-diazasteroids by means of 13C NMR
✍ Scribed by Catherine Verchère; Dominique Rousselle; Claude Viel
- Publisher
- John Wiley and Sons
- Year
- 1980
- Tongue
- English
- Weight
- 324 KB
- Volume
- 13
- Category
- Article
- ISSN
- 0749-1581
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
One methyldecahydroisoquinoline and some octahydro‐ and decahydro‐isoquinolone derivatives were studied by ^13^C NMR. The configuration of these products was deduced by comparison of the experimental chemical shifts and the calculated values. Conclusions could thus be reached on the configuration of related 8,13‐diazasteroids in the 19‐norandrostane series.
📜 SIMILAR VOLUMES
## Abstract ^13^C NMR spectroscopy was used to investigate the structures of a series of pure isomeric cresylic novolak resins. Chemical shifts were measured and assigned, and end groups were distinguished from the central repeat units of the chains. Based on these measurements, the number average
## Abstract The configurations of 1,4:3,6‐dianhydro‐2,5‐di‐__O__‐mesyl‐D‐mannitol, 1,4:3,6‐dianhydro‐2,5‐di‐__O__‐mesyl‐D‐glucitol, 1,4:3,6‐dianhydro‐2,5‐di‐__O__‐mesyl‐L‐iditol, 1,4:3:6‐dianhtydro‐2‐deoxy‐2‐iodo‐5‐__O__‐mesyl‐D‐mannitol, 1,4:3:6‐dianhtydro‐2‐deoxy‐2‐iodo‐5‐__O__‐mesyl‐D‐glucitol,
Oxazolidine derivatives of p-amino alcohols such as ephedrine have been resolved by -C NMR spedroscopy using Eu(hfc), as a chiral shift reagent. The method is quantitative in the determination of enantiomeric excess, and is advantageous where 'H NMR is of limited use owing, for example, to signitica
## A" pletely substituted by heteroatoms often presents difficulties. Conventional 13C-NMR spectroscopy certainly provides signals; however, in many cases these cannot be interpreted unambiguously. Here we show that by analyzing the l3C-I3C satellites of a 13C-NMR spectrum the bonding pattern of C