Chiral recognition of nitriles by 1H NMR spectroscopy in the presence of a chiral dirhodium complex

被引：0
|
作者：
Hameed, S
Ahmad, R
Duddeck, H
机构：
[1] Univ Hannover, Inst Organ Chem, D-30167 Hannover, Germany
[2] Quaid I Azam Univ, Dept Chem, Islamabad, Pakistan
来源：
MAGNETIC RESONANCE IN CHEMISTRY | 1998年 / 36卷
关键词：
NMR; H-1; chiral recognition; nitriles; dirhodium complexes; Mosher's acid;
D O I：
10.1002/(SICI)1097-458X(199806)36:13<S47::AID-OMR290>3.0.CO;2-J
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The H-1 NMR spectra of a variety of chiral racemic nitriles were recorded in CDCl3, in the absence and presence of dirhodium tetra-(R)-alpha-methoxy-alpha-(trifluoromethyl)phenylacetate [Rh-2(MTPA)(4); MTPA = Mosher's acid]. Moderate H-1 signal shifts but clear diastereomeric dispersions due to complexation were observed which allow the determination of the enantiomeric ratio of the nitriles. Tentative statements concerning the complexing mode of the cyano group at the rhodium atom (side-on vs, end-on) are presented. (C) 1998 John Wiley & Sons, Ltd.
引用
收藏
页码：S47 / S53
页数：7
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