Determination of the enantiomeric purity
β
J. Belleney; C. Bui; F. J. Carriere
π
Article
π
1990
π
John Wiley and Sons
π
English
β 481 KB
## Abstract The enantiomeric purities of disubstituted Ξ²βlactams were determined by ^1^H and ^13^C NMR spectroscopy using tris[3β(trifluoromethylhydroxymethylene)βdβcamphorato]europium(III), Eu(tfc)~3~, as a chiral shift reagent. Using a [Eu(tfc)~3~]/[lactam] ratio of 0.5, most of the resonances we