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首页> 美国政府科技报告 >Enantiomeric Recognition of Organic Ammonium Salts by Chiral Dialkyl-, Dialkenyl-, and Tetramethyl-Substituted Pyridino-18-Crown-6 and Tetramethyl-Substituted Bis-Pyridino-18-Crown-6 Ligands: Comparison of Temperature-Dependent 1H NMR and Empirical Force
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Enantiomeric Recognition of Organic Ammonium Salts by Chiral Dialkyl-, Dialkenyl-, and Tetramethyl-Substituted Pyridino-18-Crown-6 and Tetramethyl-Substituted Bis-Pyridino-18-Crown-6 Ligands: Comparison of Temperature-Dependent 1H NMR and Empirical Force

机译：手性二烷基 - ，二烯基 - 和四甲基 - 取代的吡啶基-18-冠-6和四甲基取代的双吡啶基-18-冠-6配体对有机铵盐的对映体识别：温度依赖的1H NmR和实证力的比较

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The successful design, synthesis, and use of molecules capable of the selective recognition of other species is of great interest to workers in catalysis, separations, enzyme functions, and other areas involving molecular recognition. The careful characterization of such synthetic systems could lead to a much improved understanding of natural systems. One area of recent interest is the enantiomeric recognition of organic amines by chiral macrocyclic ligands. Several research groups have carried out work involving these host-guest systems. Cram and his co-workers have reported chiral recognition of organic amines by a solvent extraction technique, transport of amines through liquid membranes, and partial resolution using chromatography of an amino acid on a silica gel or polystyrene bound chiral host material. Lehn and his co-workers have studied reactivity differences when certain p-nitrophenyl esters were thiolyzed while complexed with chiral host molecules. (jes)

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