| Literature DB >> 15166377 |
Leyong Wang1, Myroslav O Vysotsky, Anca Bogdan, Michael Bolte, Volker Böhmer.
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.Entities:
Year: 2004 PMID: 15166377 DOI: 10.1126/science.1096688
Source DB: PubMed Journal: Science ISSN: 0036-8075 Impact factor: 47.728