Chiral NMR Discrimination of Piperidines and Piperazines Using (18-Crown-6)-2,3,11,12-tetracarboxylic Acid

Enantiomeric discrimination is observed in the 1H and 13C NMR spectra of piperidines and piperazines in the presence of (−)-(18-crown-6)-2,3,11,12-tetracarboxylic acid. The amines are protonated by the carboxylic acid groups of the crown ether to produce the corresponding ammonium and carboxylate io...

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Veröffentlicht in:	Journal of organic chemistry 2006-11, Vol.71 (24), p.9178-9182
Hauptverfasser:	Lovely, Ann E, Wenzel, Thomas J
Format:	Artikel
Sprache:	eng
Schlagworte:	Alicyclic compounds Alicyclic compounds, terpenoids, prostaglandins, steroids Carboxylic Acids - chemistry Chemistry Crown Ethers - chemistry Exact sciences and technology Heterocyclic compounds Heterocyclic compounds with only one n hetero atom and condensed derivatives Heterocyclic compounds with several n hetero atoms in the same ring, in separated rings or in fused rings Magnetic Resonance Spectroscopy - methods Organic chemistry Piperazines - analysis Piperidines - analysis Preparations and properties Stereoisomerism
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