Two novel optically active crown ethers (7) and (14) incorporating helicene molecular frameworks were prepared, and their chiral recognition properties were examined to show that (M)-(–)-(7) and (M)-(–)-(14) had opposite chiral recognition for the transport of methyl phenylglycinate or 1-phenylethylamine.
M. Nakazaki, K. Yamamoto, T. Ikeda, T. Kitsuki and Y. Okamoto, J. Chem. Soc., Chem. Commun., 1983, 787 DOI: 10.1039/C39830000787
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