Synthesis, fluorescent properties and aggregation of 2,3-dihydroisoindolenylcalix[4]arenes
作者:R. V. Rodik、V. Yu. Malytskyi、V. S. Starova、T. V. Yegorova、A. I. Kysil、O. A. Zaporozhets、Z. V. Voitenko、V. I. Kalchenko
DOI:10.1007/s10847-012-0252-3
日期:2013.12
New derivatives of calix[4]arenes, containing two isoindole fragments in distal positions of the macrocycle upper rim were synthesized. According to NMR and molecular modeling data, the obtained calixarenes exist in “flattened cone” conformation with inclination angles of benzene rings to the macrocycle plane equal to 133–140° and 92–100°. Fluorometric studies showed the presence of self-aggregation of isoindolenylcalixarenes in acetone solutions starting from micromolar concentrations.
The synthesis of newcalix[4]arenes bearing two or four tetrazole liganting groups at the upperrim is decribed. The structures of tetrakis-tetrazolecalix[4]arene and its palladium dichloride (2:2) complex are examined by X-ray crystallography.
Calix[4]arenes, functionalized at the wide rim with two or four N-2-sulfonylamidine groups were prepared. In the crystalline state, the bowl shaped calix [4]arene-bis-N-sulfonyltrifluoromethylacetamidine 3b is associated through intermolecular hydrogen bonds, (NHO)-O-...=S, while the phenyl rings of the Ph-SO2-fragments are hosted in the cavities of the nearby molecules of 3b. Calixarene 4b influences Ca2+ transport in Mg2+, ATP-dependent calcium pumps. (c) 2005 Elsevier Ltd. All rights reserved.
Calix[4]arenequinazolinones. Synthesis and structure
The synthesis of calix[4]arenes bearing two quinazolin-4-ones group at the upper rim is decribed. H-1 NMR spectra and quantum chemical calculations make it possible to suggest that calix[4]arenequinazolinones form three rotamers in solutions at room temperature, due to the restricted rotation of the quinazolinone fragments. The X-ray structure investigation indicates that quinazolin-4-onecalix[4]arene exists in the crystal state as the methanol 1: 1 inclusion complex. (C) 2007 Elsevier Ltd. All rights reserved.