Determination of optical purity of 3,5-dimethoxybenzoyl-leucine diethylamide by chiral chromatography and 1H and 13C NMR spectroscopy
✍ Scribed by Kyu Sung Heo; Myung Ho Hyun; Yoon Jae Cho; Jae Jeong Ryoo
- Publisher
- John Wiley and Sons
- Year
- 2010
- Tongue
- English
- Weight
- 358 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0899-0042
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
## Abstract High field high resolution ^13^C NMR spectroscopy allows the quantitative determination of a mixture of the four diastereomers in racemic α‐tocopherol.
## Abstract The NMR spectra of a series of chiral propionamides have been determined in D(+)1‐phenylethylamine solution. The α‐methine protons of the propionic acid moiety in the propionamide enantiomers were found to be anisochronous in this solvent. The sense of non‐equivalence of these protons w
## Abstract The configuration and stable conformation of two dibenzylidene‐L‐iditol isomers formed upon benzalation of L‐iditol, as well as that of a third isomer obtained by partial hydrolysis of the tribenzylidene derivative—the main product of the benzalation reaction—were determined by ^1^H and
L-thyroxine and D-thyroxine were separated on ligand exchange chiral thin layer chromatographic plates, using a solvent system consisting of acetonitrile: methanol: water 60: 15: 15 v/v, at a wavelength of 254 nm. The methodology, chiral recognition mechanism@) involved and its application are discu
The enantiomeric purity of several tobacco alkaloids and nicotine-like compounds was determined using 'H NMR (300 MHz) spectroscopy in the presence of (-)-(R)l,l'-binaphthyl-2,2'-diylphosphoric acid (BNPPA) as a chiral complexing agent. The most significant signal splitting resulting from diastereoi