Novel NMR chiral solvating agents derived from (1R,2R)-diaminocyclohexane: synthesis and enantiodiscrimination for chiral carboxylic acids
摘要:
A series of new compounds, (1R,2R)-1-(1',8-naphthalimide)-2-aminocyclohexane 1 and its 4'-derivatives 2 and 3 derived from (1R,2R)-1,2-diaminocyclohexane have been synthesized conveniently and efficiently. H-1 NMR spectroscopy was employed to investigate their enantiodiscriminating ability. Compared with alpha-phenylethylamine, a commercially available chiral solvating agent (CSA), these compounds exhibited better enantiodiscriminating ability toward the chiral carboxylic acids we had chosen, distinguishing them as promising and practical CSAs. (c) 2006 Elsevier Ltd. All rights reserved.