Issue 37, 2013

[14]Heterophane prototypes containing azolium and/or azole anion-binding motifs

Abstract

Revisiting a ‘3 + 1’ convergent stepwise strategy permitted the synthesis of [14]imidazoliophane 2·2Br in excellent yield for a macrocyclization. The new [14]triazoliophane 3 and bis(1,2,3-triazolium) counterpart 4·2Cl were less synthetically accessible and the hybrid derivative 5·Cl proved troublesome to prepare. Triazolophane 3 was devoid of anion-binding affinities, while charged [14]heterophane prototypes showed a particular preference for acetate. When association constants were compared, dicationic systems 2·2PF6 and 4·2PF6 showed greater values than monocationic macrocycle 5·PF6, and the highest affinities corresponded to the bis(imidazolium) receptor 2·2PF6.

Graphical abstract: [14]Heterophane prototypes containing azolium and/or azole anion-binding motifs

Supplementary files

Article information

Article type
Paper
Submitted
12 Jun 2013
Accepted
30 Jul 2013
First published
01 Aug 2013

Org. Biomol. Chem., 2013,11, 6385-6396

[14]Heterophane prototypes containing azolium and/or azole anion-binding motifs

N. Mesquida, I. Dinarès, A. Ibáñez and E. Alcalde, Org. Biomol. Chem., 2013, 11, 6385 DOI: 10.1039/C3OB41214H

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