Building Triazolated Macrocycles from Bis-Propargylated Calix[4]arenes and Bis-Azidomethylated Azobenzene or Stilbene.

Autor:	Lentin, Ivan, Korniltsev, Ilia, Gorbunov, Alexander, Cheshkov, Dmitry, Bezzubov, Stanislav, Kovalev, Vladimir, Vatsouro, Ivan
Předmět:	STILBENE AROMATIC compounds AZOBENZENE CALIXARENES X-ray diffraction STILBENE derivatives MACROCYCLIC compounds
Zdroj:	Molbank; Dec2023, Vol. 2023 Issue 4, pM1748, 11p
Abstrakt:	Copper(I)-catalyzed azide-alkyne cycloaddition was employed to construct biscalixarene assemblies from the calix[4]arene dipropargyl ethers and 4,4′-bis-azidomethylated azobenzene or stilbene. Three bis(calixarenes) having the calix[4]arene cores linked to each other by pairs of (E)-azobenzene/stilbene units through four triazole groups were obtained as confirmed by NMR, HRMS and X-ray diffraction data. Nevertheless, the formation of larger macrocycles and polymeric/oligomeric products was found to be the major competing process that seriously limited the applicability of the one-step macrocyclization approach for the construction of photoresponsive biscalixarene assemblies linked by pairs of azobenzene/stilbene units. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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