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Synthesis and properties of calixarene analogs incorporating a thiophene unit in the macrocyclic ring

✍ Scribed by Kazuaki Ito; Yoshihiro Ohba; Takafumi Tamura; Tomoaki Ogata; Hajime Watanabe; Yasumitsu Suzuki; Takayuki Hara; Yukou Morisawa; Tyo Sone

Publisher
Journal of Heterocyclic Chemistry
Year
2001
Tongue
English
Weight
67 KB
Volume
38
Category
Article
ISSN
0022-152X

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✦ Synopsis

Abstract

Calixarene analogs containing a thiophene unit in the macrocyclic ring were prepared by a stepwise method. The macrocycles adopt a cone‐like form as the preferred conformation in solution. The induced chemical shift change, nOe experiment, and ^1^H relaxation time (T~1~) measurement supported the fact that the macrocycle forms a complex with the N‐methylpyridinium salt. In contrast, O‐tetramethylated macrocycles and linear phenol‐formaldehyde tetramer, could not efficiently include the N‐methylpyridinium salt.

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