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. 2004 May 28;304(5675):1312-4.
doi: 10.1126/science.1096688.

Multiple catenanes derived from calix[4]arenes

Leyong Wang  1 , Myroslav O Vysotsky, Anca Bogdan, Michael Bolte, Volker Böhmer
Affiliations

Multiple catenanes derived from calix[4]arenes

Leyong Wang et al. Science. .

Abstract

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.

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