CC BY 4.0 · SynOpen 2023; 07(04): 486-490
DOI: 10.1055/s-0042-1751494
paper

Synthesis and Characterization of an Eight-Membered Heterocyclic 1,3,5,7-Tetra(3-pyridyl)-1,3,5,7-tetrazacyclooctane

Li Li
a   School of Chemistry and Life Sciences, Suzhou University of Science and Technology, Suzhou 215009, Jiangsu, P. R. of China
,
Guo-Liang Dai
a   School of Chemistry and Life Sciences, Suzhou University of Science and Technology, Suzhou 215009, Jiangsu, P. R. of China
,
Xue Hua Zhu
a   School of Chemistry and Life Sciences, Suzhou University of Science and Technology, Suzhou 215009, Jiangsu, P. R. of China
,
Lei Yu
b   Soochow University Analysis and Testing Center, Jiangsu, P. R. of China
,
Hai Yan Li
b   Soochow University Analysis and Testing Center, Jiangsu, P. R. of China
› Author Affiliations


Abstract

N,N′-Bis(3-pyridyl)methanediamine was prepared by treating 3-aminopyridine with formaldehyde in acetonitrile. By treating it with formaldehyde, the eight-membered heterocyclic ring compound 1,3,5,7-tetra(3-pyridyl)-1,3,5,7-tetrazacyclooctane was prepared. This could occur in a two-step manner in a [3+1+3+1] cycloaddition reaction. The compounds were characterized by X-ray crystallography, 1H and 13C NMR spectroscopy, and mass spectrometry. The powder XRD pattern of 1,3,5,7-tetra(3-pyridyl)-1,3,5,7-tetrazacyclooctane was also determined and revealed an uncommon twist-crown conformation, which was further confirmed by DFT calculations.

Supporting Information



Publication History

Received: 26 July 2023

Accepted after revision: 18 August 2023

Article published online:
16 October 2023

© 2023. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by/4.0/)

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