Two chiral crown ethers (+)-(S)-(4) and (–)-(R,R)-(5) with a 4,4′-biphenanthryl moiety as the chiral centre have been prepared, and their chiral recognition properties were examined to show that (+)-(S)-(4) has a high enantiomer selectivity for 2-aminotetralin and 1,2-diphenylethylamine.
K. Yamamoto, K. Noda and Y. Okamoto, J. Chem. Soc., Chem. Commun., 1985, 1065 DOI: 10.1039/C39850001065
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