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Synthesis and structures of new chiral diamide‐ester macrocycles
Author(s) -
Gao Ming Zhang,
Reibenspies Joseph H.,
Zingaro Ralph A.,
Wang Bo,
Xu Zun Le
Publication year - 2004
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570410609
Subject(s) - chemistry , titration , elemental analysis , pyridine , mass spectrum , infrared spectroscopy , metal ions in aqueous solution , ion , spectral line , metal , catalysis , polymer chemistry , inorganic chemistry , crystallography , organic chemistry , physics , astronomy
A series of new hetero‐macrocyclic diamide‐ester compounds ( 4a — 4z, 6a — 6b ) were synthesized using 4‐(dimethylamino)pyridine as catalyst and characterization by infrared spectra, nuclear magnetic resonance spectra, mass spectra and elemental analyses. The structures of 4e and meso 4b were determined by X‐ray crystallography. The association constants of the compounds with various metal ions were determined by UV‐visible spectroscopic titration, and showed a selective recognition for certain metal ions.