A New Synthesis of Oxacalix[3]arene Macrocycles and Alkali-Metal-Binding Studies

Extraction Properties of <i>p</i>-Methyloxacalix[3]arene Methyl Ether for Alkali Metal Ions

“…This result is the same as that reported for p-tert-butyloxacalix [3]arene [4]. It appears that the strong intramolecular hydrogen bonds between the hydroxyl groups make the oxygen atoms unable to bind to the alkali metal ions.…”

“…p-Methyloxacalix [3]arene was synthesized according to the literature [4]. A mixture of p-methyloxacalix [3] …”

Application of sulfonamide derivative of calixarene for improvement of mechanical properties and thermal stability of polyurethane composite

“…It has been established that the phenolic hydroxy groups appended on the lower rim form strong intermolecular hydrogen bonds, serving as the main driving force for the stabilization of the 'cone' conformation [1][2][3][4]. They are a class of host compounds that combine a polar and an apolar molecular region, both capable of interacting with a variety of guest molecules [4][5][6][7].…”

Fine Tuning of the Cavity Size in Calixarene-Like Cyclophanes: A Complete Series of Homooxacalix[4]arene Ligands for Quaternary Ammonium Ions

“…Three compounds in this series, namely 2 ± 4, are relatively well-known materials, [7] while the isolation of a small sample of the pure compound only has been reported in the case of 5. [10] In general, homooxacalixarenes appear in the literature from time to time, and some recent papers deal with either 2 [11] or 4 and related compounds; [12,13] however, almost no attention has been paid to homooxacalixarenes as a class of compounds, so we decided to start a systematic investigation. We have already reported on simple synthetic strategies to produce polycyclic ether derivatives related to 3 [14] and 5, [15] as well as on the complexation of quaternary ammonium ions in organic media by a tricyclic derivative of 3 [14] and by the simple parent compounds 2 ± 4.…”