New dioxadiaza-, trioxadiaza- and hexaaza-macrocycles containing dibenzofuran units

abstract

New dioxadiaza-, trioxadiaza-, and hexaaza-macrocycles containing rigid dibenzofuran groups (DBF) were prepared by a convenient synthetic route in high yields. The structures of the macrocycles were unequivocally established by electrospray mass spectrometry (ESIMS) studies together with NMR spectroscopy, with the exception of [14](DBF)N-3. The structures of the copper complex of [14](DBF)N-3 and of the diprotonated form of [22](DBF)N2O3 were determined by single crystal X-ray diffraction. Conformational analyses on the free macrocycles [14](DBF)N-3 and [22](DBF)N2O3 as well as on their larger counterparts containing two DBF units were undertaken in order to understand the synthetic findings. (c) 2006 Elsevier Ltd. All rights reserved.

keywords

CAMBRIDGE STRUCTURAL DATABASE; CRYSTAL-STRUCTURES; MOLECULAR CLEFTS; AQUA COMPLEXES; RECEPTORS; ANIONS; GUEST; WATER; ACIDS

subject category

Chemistry

authors

Li, F; Delgado, R; Coelho, A; Drew, MGB; Felix, V

our authors

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