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• W1998544496 startingPage "7519" @default.
• W1998544496 abstract "Chiral calixarene analogues incorporating amino acid residues into the macrocyclic rings were prepared from the cyclization reactions of bis(chloromethyl)phenol-formaldehyde tetramer with amino acid methyl ester in moderate yields. The macrocycles form a chiral concavity, which is induced by the chiral transmission from the point chirality of the amino acid residues to the phenol-formaldehyde tetramer unit. The macrocycles have the cavity pi-basic enough to include the quaternary ammonium ion due to the cation-pi interaction and can serve as a shift reagent for racemic ammonium ions during 1H NMR analysis." @default.
• W1998544496 created "2016-06-24" @default.
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• W1998544496 date "2002-09-17" @default.
• W1998544496 modified "2023-09-24" @default.
• W1998544496 title "Syntheses of Chiral Homoazacalix[4]arenes Incorporating Amino Acid Residues: Molecular Recognition for Racemic Quaternary Ammonium Ions" @default.
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• W1998544496 doi "https://doi.org/10.1021/jo020300u" @default.
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• W1998544496 hasPublicationYear "2002" @default.
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