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Synthesis 2010(6): 953-958  
DOI: 10.1055/s-0029-1218684
PAPER
© Georg Thieme Verlag Stuttgart ˙ New York

Tuning the Polarity of Hierarchically Assembled Helicates

Miriam Baumerta, Markus Albrecht*a, Henrik D. F. Winklerb, Christoph A. Schalleyb
a Institut für Organische Chemie der RWTH Aachen, Landoltweg 1, 52074 Aachen, Germany
Fax: +49(241)8092385; e-Mail: Markus.Albrecht@oc.rwth-aachen.de;
b Institut für Chemie und Biochemie - Organische Chemie, Freie Universität Berlin, Takustr. 3, 14195 Berlin, Germany
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Publication History

Received 27 August 2009
Publication Date:
24 February 2010 (online)

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Abstract

Catechol ligands bearing ester groups in 3-position (1a,b, 2) are building blocks for the formation of triply lithium-bridged dinuclear helicate-type complexes [Li3(1a,b,2)6Ti2]-. Attachment of appropriate functionalities at the ester unit allows the fine tuning of the polarity of the compounds to afford solubility in highly nonpolar as well as highly polar solvents. The investigations show that the internal dinuclear core is stable in a broad variety of solvents, even in water.

Key words

helicates - dinuclear complexes - esters - hierarchical self-assembly - templates

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