Toğrul, MahmutTurgut, YılmazHoşgören, Halil2024-04-242024-04-242004Toğrul, M., Turgut, Y. ve Hoşgören, H. (2004). Enantioselective recognition of ammonium perchlorate salts by optically active monoaza-15-crown-5 ethers. Chirality, 16(6), 351-355.0899-00421520-636Xhttps://doi.org/10.1002/chir.20047https://hdl.handle.net/11468/14010https://onlinelibrary.wiley.com/doi/epdf/10.1002/chir.20047?src=getftrChiral monoaza-15-crown-5 ethers (1, 2) were prepared from (R)-(-)-2-amino-1-butanol in high yield. The chiral monoaza-15-crown-5 ethers were purified directly as NaClO4 complexes. Molecular recognition by these chiral monoaza-crown ethers of (R)- and (S)-PhEtHClO4 and (R)- and (S)-NapEtHClO(4) as characterized by UV-vis spectroscopy. The order of enantiomeric selectivity is (R)- > (S)- PhEtHClO4 and (S)- > (R)-NapEtHClO(4) for 1. In the case of 2 it was (R)- > ($)-PhEtHClO4 and (R)- > (S)-NapEtHClO(4). The cavity of macrocycle and steric hindrance of the benzene units appears to play an important role in recognition. (C) 2004 Wiley-Liss, Inc.eninfo:eu-repo/semantics/closedAccessEnantiomeric recognitionHost-guest chemistryAzacrown ethersChiral ammonium saltsUv-VisArticle166351355WOS:0002223190000032-s2.0-30425984921519057910.1002/chir.20047Q2Q2