An assignment of relative configurations has been achieved for the diastereomeric racernates(lR2R,lS2S) and (1R2S, 1S2R) of 3,3-dimethyl-l,2-diphenylbuta~-l-ol through the comparative analysis of the respective chemical shifts induced by Eu(fod), in the 'H and '"C NMR spectra, and the corresponding
โฆ LIBER โฆ
1H NMR separation of epimeric mixtures by lanthanide shift reagents: Analysis of some isoxazolidine derivatives
โ Scribed by P. Bucci; G. Chidichimo; A. Liguori; G. Menniti; N. Uccella
- Publisher
- John Wiley and Sons
- Year
- 1984
- Tongue
- English
- Weight
- 300 KB
- Volume
- 22
- Category
- Article
- ISSN
- 0749-1581
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โฆ Synopsis
Epimeric mixtures of isoHazolidine derivatives were investigated by ' H NMR spectra obtained in the presence of lanthanide shift reagents. The NMR signals of all the components contained in a mixture of 2 , 3 -d i p n e n y l -S -c e ~y ~~~~e s were identified and the LISCA computer program enabled the stereochemistry of the Merent isomers to be established.
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