A novel optically active double-layered bis-crown ether (–)-(S,S)-(7) with a diphenanthrylnaphthalene moiety as the chiral centre has been prepared, and examination of its chiral recognition behaviour showed that (–)-(S,S)-(7) has a high enantiomer selectivity for 1,6-diphenylhexamethylene-1,6-diamine.
K. Yamamoto, H. Yumioka, Y. Okamoto and H. Chikamatsu, J. Chem. Soc., Chem. Commun., 1987, 168 DOI: 10.1039/C39870000168
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