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Chiral Discrimination of Some Annelated Xanthine Derivatives by the Dirhodium Method

✍ Scribed by Sven Rockitt; Helmut Duddeck; Anna Drabczynska; Katarzyna Kiec-Kononowicz


Publisher
John Wiley and Sons
Year
2000
Tongue
English
Weight
427 KB
Volume
2000
Category
Article
ISSN
1434-193X

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First direct discrimination of chiral ph
✍ Shahid Malik; Helmut Duddeck; Jan Omelanczuk; Muhammad Iqbal Choudhary πŸ“‚ Article πŸ“… 2002 πŸ› John Wiley and Sons 🌐 English βš– 128 KB πŸ‘ 2 views

## Abstract Enantiomeric ratios of compounds with P=Se functionalities (phosphine selenides) can easily be determined by ^1^H, ^13^C, ^31^P, and ^77^Se NMR spectroscopic inspection of their diastereomeric complexes with (__R__)‐Rh~2~(MTPA)~4~ (MTPA‐H ≑ methoxytrifluoromethylphenylacetic acid; Moshe

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## Abstract The phenylselenenylmenthane and ‐menthene derivatives 1–4 were studied in terms of ^1^H and ^13^C signal assignments, conformational analysis and also complexation shifts (Δδ) and dispersion effects (Δν) observed when non‐racemic (ca 2 : 1) mixtures of the chiral selenides were exposed