Determination of Enantio- meric Excess for Organic Primary Amine Compounds by Chiral Recognition Fast-Atom Bombardment Mass Spectro- metry. Int. J. Mass Spectrom 1999, 193(2/3), 123-130.SAWADA M, YAMAOKA H, TAKAI Y, et al. Determination of enantiomeric excess for organic primary amine ...
The enantiomeric excess of unprotected amino acids can be determined very reliable by P-31 NMR spectroscopy after derivatization as phosphonic amides 1. This rapid and simple analytical procedure, suitable for aqueous solutions. is also applicable for amino acid derivatives, chiral amines, and alcohols...
continuous monitoring of enantiomeric excess. To speed up measurements, it is necessary to use a physical process which is faster than the migration on a substrate. This is naturally achieved in chiroptical measurements, which rely on the interaction of circularly polarized electromagnetic radiation ...
A technique for determination of enantiomeric excess of cathinone, 2-amino-1-phenyl-1-propanone, by use of the chiral lanthanide shift reagent (LSR), tris[3-(heptafluoropropylhydroxymethylene)-d-camphorato]europium (III), Eu (HFC)3, is described. The hydrochloride salt of the cathinone sample...
A new cyclodextrin (CD) derivative, 2,6-di-O-benzyl-3-O-valeryl-beta-CD, was synthesized and characterized by 1H NMR and IR. Using the beta-CD derivative as chiral stationary phase of capillary gas chromatography, one chiral column was prepared. On
M. (1987), ChemInform Abstract: Methylphosphonic Dichloride as Reagent for the Determination of the Enantiomeric Excess of Chiral Thiols. Scope and Limitations. ChemInform, 18: no. doi: 10.1002/chin.198722081 Author Information Dep. Org. Chem., Univ. Groningen, 9747 AG Groningen, Neth. ...
(enantiomeric excess)。对每个样品分别重复实验5 次,得到各光学纯度值的 RSD 均小于2%。比较两 种方法计算出的光学纯度,相对偏差<1. 34%(结果见表2)。说明 TTCA 在衍生化过程中没有发生消 旋化,TTCA 衍生物的光学纯度就是TTCA 的光学纯度,使用苯胺衍生TTCA 测定TTCA 光学纯度的方法 是准确的。而与旋光仪测定...
Enantiomeric excess determination of some chiral sulfoxides by NMR: use of (S)-Ibuprofen® and (S)-Naproxen® as shift reagentsAuthor links open overlay panelLaëtitia Fauconnot, Caroline Nugier-Chauvin ∗, Nicolas Noiret, Henri PatinShow more...
2) Enantiomeric composition 对映体定量3) determination [英][dɪ,tɜ:mɪ'neɪʃn] [美][dɪ'tɝmə'neʃən] 含量测定 1. Preparing Technique and Determination of Concentrated Tablet of Polygonum Cuspidatum; 虎杖浓缩片的制备工艺及含量测定 2. Microwave technique extraction ...
The enantiomeric excess of unprotected amino acids can be determined very reliable by P-31 NMR spectroscopy after derivatization as phosphonic amides 1. This rapid and simple analytical procedure, suitable for aqueous solutions. is also applicable for amino acid derivatives, chiral amines, and alcohols...