A unique reversal of elution order during direct enantiomeric resolution of amide derivatives of 1‐phenyl‐2‐aminopropane by high performance liquid chromatography on chiral stationary phases
作者:
T. D. Doyle,
I. W. Wainer,
期刊:
Journal of High Resolution Chromatography
(WILEY Available online 1984)
卷期:
Volume 7,
issue 1
页码: 38-40
ISSN:0935-6304
年代: 1984
DOI:10.1002/jhrc.1240070107
出版商: Wiley Subscription Services, Inc., A Wiley Company
关键词: High performance liquid chromatography;Resolution of enantiomers;Chiral stationary phase;1‐Phenyl‐2‐aminopropane, amide derivatives;Amphetamine derivatives;Reversal of elution order
数据来源: WILEY
摘要:
AbstractEnantiomeric amide derivatives of (S)‐ and (R)‐1‐phenyl‐2‐aminopropane (dextro‐ and levoamphetamine, respectively) were resolved by high performance liquid chromatography on commercially available ionically and covalently bonded chiral stationary phases ((R)‐N‐(3,5‐dinitrobenzoyl)phenylglycine). Ten enantiomeric amide pairs were synthesized and chromatographed on the columns by using a mobile phase of hexane‐isopropanol (97 : 3), a flow rate of 2 ml/min, and a column temperature of 20°C. The (R)‐isomer of all 10 amides eluted first on the covalent column as did the (R)‐isomer of nine derivatives on the ionic column. however, the 3,5‐dinitrobenzoyl amide of (S)‐ amphetamine eluted before the (R)‐isomer on the ionic column. This reversal in enantiomeric elution order reveals the complexity of the interactions occurring on these columns and emphasizes the hazards of relying on observed elution order as ana prioriindica
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