It was found that the oxirane ring is a functional group amenable to chiral discrimination by dirhodium-MTPA complexes. Considerable signal shifts up to 0.7 ppm are observed for 1 H nuclei close to the rhodium atoms in the complex. In analogy to previously reported olefins, this method appears to be
Chromatographic and 1H NMR support for a proposed chiral recognition model
β Scribed by William H. Pirkle; Christopher J. Welch
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 588 KB
- Volume
- 683
- Category
- Article
- ISSN
- 1873-3778
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π SIMILAR VOLUMES
The 1H NMR spectra of a variety of chiral racemic nitriles were recorded in in the absence CDCl 3 and presence of dirhodium tetra-(R)-a-methoxy-a-(triΓuoromethyl)phenylacetate MTPA 4 MosherΓs [Rh 2 (MTPA) 4 ; acid]. Moderate 1H signal shifts but clear diastereomeric dispersions due to complexation w
Benzoylated and benzylated cyclodextrins give rise to non-spectroscopy. Cyclodextrins bearing aromatic substituents at the primary or secondary sites only are more efficient CSAs equivalence in the 1 H-NMR spectra of racemates of 3,5dinitrophenyl derivatives of chiral amines, amino alcohols, compare