title: Multiple catenanes derived from calix[4]arenes.
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.
authors.affiliation: Fachbereich Chemie und Pharmazie, Abteilung Lehramt Chemie, Johannes Gutenberg-Universität, Duesbergweg 10-14, D-55099, Mainz, Germany.
authors.forename: Leyong
authors.initials: L
authors.lastname: Wang
authors.forename: Myroslav O
authors.initials: MO
authors.lastname: Vysotsky
authors.forename: Anca
authors.initials: A
authors.lastname: Bogdan
authors.forename: Michael
authors.initials: M
authors.lastname: Bolte
authors.forename: Volker
authors.initials: V
authors.lastname: Böhmer