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Syntheses and properties of tetraaza-, diaza-, tetraoxa-, and dioxa-metacyclophanes

✍ Scribed by Kazuaki Ito; Yoshihiro Ohba; Eita Shinagawa; Satoshi Nakayama; Shigemi Takahashi; Katsuhiko Honda; Hidekazu Nagafuji; Akane Suzuki; Tyo Sone

Publisher: Journal of Heterocyclic Chemistry
Year: 2000
Tongue: English
Weight: 669 KB
Volume: 37
Category: Article
ISSN: 0022-152X
DOI: 10.1002/jhet.5570370612

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✦ Synopsis

Abstract

Metacyclophanes were prepared by cyclization reactions between bis(chloromethyl) compounds and piperazine, primary amines, or ethylene glycol. The ^1^H nmr relaxation time (T~1~) measurements indicated that the macrocycles feature the up and down motion of the aromatic units around the XCH~2~Ar (X = N, O) methylene moieties as the axes. Metacyclophanes incorporating piperazine units showed high complexation ability for alkaline metal cations.

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