Synthesis 2019; 51(07): 1623-1632
DOI: 10.1055/s-0037-1611344
paper
© Georg Thieme Verlag Stuttgart · New York

1,8,10-Substituted Anthracenes – Hexafunctional Frameworks via Head-to-Tail Photodimerisation

Philipp Niermeier
,
Jan-Hendrik Lamm
,
Jan-Hendrik Peters
,
Beate Neumann
,
Hans-Georg Stammler
,
Norbert W. Mitzel*
Universität Bielefeld, Fakultät für Chemie, Lehrstuhl für Anorganische Chemie und Strukturchemie, Centrum für Molekulare Materialien CM2, Universitätsstraße 25, 33615 Bielefeld, Germany   eMail: mitzel@uni-bielefeld.de
› Institutsangaben
This work was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) grant number MI 477/25-2, project number 248859450.
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Publikationsverlauf

Received: 28. September 2018

Accepted after revision: 23. Oktober 2018

Publikationsdatum:
12. Dezember 2018 (online)


Abstract

Several 1,8,10-functionalised anthracene derivatives and a couple of 1,8,9-functionalised anthracene analogous, bearing alkynyl substituents at positions 1 and 8 were synthesised and their photochemistry investigated in UV irradiation experiments. Almost all compounds could be converted into their 9,10:10′,9′-head-to-tail photodimers completely excluding the formation of the corresponding head-to-head isomers. Working under non-inert conditions led to formation of endoperoxides in some cases. Furthermore, a non-classical [4π+2π] photodimer was obtained from 1,8,10-tris[(trimethylsilyl)ethynyl]anthracene with one of the alkynyl substituents involved in the photoreaction. The 1H and 13C NMR spectra of all classical and non-classical photodimers were compared with those of the endoperoxides identifying characteristic shifts for the atoms at positions 9 and 10. Moreover, solid-state structures were determined for one or more of each representative.

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