Synthesis and chiral recognition of an optically active bis-crown ether incorporating a diphenanthrylnaphthalene moiety as the chiral centre

Abstract
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.

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