## Abstract An NMR method is described for assaying the enantiomer composition of the pharmacologically active material penicillamine (**1**), using trisβ(3βheptafluorobutyrylβ__d__βcamphorato)europium. The L enantiomer can be detected at levels of 0Β·4 to 0Β·5% in DL mixtures. Problems due to the in
NMR study of amphetamines using europium shift reagents
β Scribed by Robert V. Smith; Paul W. Erhardt; David B. Rusterholz; Charles F. Barfknecht
- Publisher
- John Wiley and Sons
- Year
- 1976
- Tongue
- English
- Weight
- 527 KB
- Volume
- 65
- Category
- Article
- ISSN
- 0022-3549
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π SIMILAR VOLUMES
The complete assignment of the proton NMR spectra of several a-, pand ynaphthoflavones at 100 MHz using Eu(fod), and double resonance experiments has been carried out. The compounds were found to associate at the carbonyi oxygen, by analogy with flavones where complete structural assignment can be a
I J Tris(dipivalomethanato)e~opium(llI) has beem used as an NMR shift reagent to obtain simpli6ed spectra of tropine, of coordination was secondary amine > secondary alcohol > tertiary amine h ketone. . . .~ systems containing two different heteroatoms. The observed order tra of bifuictionai tropane
## Abstract The isomeric benzeneazodipyrromethene derivatives, obtained from the reaction of bilirubin and a phenyldiazonium salt were separated as their corresponding methyl esters. The lanthanideβinduced chemical shifts, coupling constants and double irradiation experiments permit direct assignme