Detection of the chirality of 3-heteroaryl-chromones using lanthanide shift reagents
β Scribed by A. V. Turov; S. P. Bondarenko; V. P. Khilya
- Publisher
- Springer US
- Year
- 1997
- Tongue
- English
- Weight
- 295 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0009-3122
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π SIMILAR VOLUMES
During a recent investigation1 it was important to identify the phosphins oxides formed i:l the alkaline hydrolysis of the cyclia salts (1) and ( 2). The use of nmr Shift reagents appeared to offer a facile solution to this problema. At the time that this work was crrrie6 -
The 13C NMR behaviour of ten acyclic terpene alcohols was examined in the presence of a chiral lanthanide shift reagent (CLSR). For each alcohol, we measured the lanthanide-induced shift (LIS) on the signals of the carbons and the splitting of some signals, which allowed the enantiomeric differentia
of the following in a volume of 1 liter: naphthalene (150 g), 2,5-diphenyloxazole (8 g), 1,4-bis(4-methyl-5-phenyl-oxazol-2-yI)benzene (0.6 g), ethylene glycol (20 ml), 2-ethoxyethanol(lOO ml), and toluene to make 1 liter. The radioactivity was measured in the liquid scintillation counter with an 18