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Science 28 May 2004:
Vol. 304. no. 5675, pp. 1312 - 1314
DOI: 10.1126/science.1096688
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Reports

Multiple Catenanes Derived from Calix[4]arenes

Leyong Wang,1 Myroslav O. Vysotsky,1 Anca Bogdan,1 Michael Bolte,2 Volker Böhmer1*

A multicatenane is described in which two belts consisting of four annelated rings attached to the wide rims of two calix[4]arenes are interwoven in such a way that each ring of one belt penetrates two adjacent rings of the other belt and vice versa. The key step of the synthesis of this [8]catenane is the exclusive formation of preorganized heterodimers between a multimacrocyclic tetraurea calix[4]arene and an "open-chain" tetraurea calix[4]arene containing eight {omega}-alkenyl groups. When a tetraurea calix[4]arene containing four alkenyl groups is used, a bis-[3]catenane is formed analogously.

1 Fachbereich Chemie und Pharmazie, Abteilung Lehramt Chemie, Johannes Gutenberg-Universität, Duesbergweg 10-14, D-55099, Mainz, Germany.
2 Fachbereich Chemie und pharmazeutische Wissenschaften, Institut für Organische Chemie, J.-W. Goethe Universität, Marie-Curie Straße 11, 60439 Frankfurt/Main, Germany.

* To whom correspondence should be addressed. E-mail: vboehmer{at}mail.uni-mainz.de

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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Efficient production of [n]rotaxanes by using template-directed clipping reactions.
J. Wu, K. C.-F. Leung, and J. F. Stoddart (2007)
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Science. ISSN 0036-8075 (print), 1095-9203 (online)