Synthesis and Structural Chemistry of a Ternary Calix[4]arene Lattice Inclusion System
作者:Solhe F. Alshahateet
DOI:10.1007/s10870-009-9632-y
日期:2010.3
A ternary calix[4]arene latticeinclusionsystem 3 has been synthesized, characterized and its crystalstructure was determined by single crystal X-ray diffraction study. 3 is orthorhombic, space group Pbca with a = 21.236(3) Å, b = 12.2820(16) Å, c = 25.795(3) Å, α = 90°, β = 90°, γ = 90° and Z = 4. Analyses of single crystals of arene 3 crystallized from DMSO revealed the existence of a ternary system
Experimental Comparative Study of Dynamic Behavior in Solution Phase of C-Tetra(phenyl)resorcin[4]arene and C-Tetra(phenyl)pyrogallol[4]arene
作者:José Luis Casas-Hinestroza、Miguel Ángel Vela Suazo、Mauricio Maldonado Villamil
DOI:10.3390/molecules25102275
日期:——
phenyl-resorcinarenes and pyrogallolarenes is known to produce a conformational mixture of cone and chair isomers. Depending on the synthesis conditions the composition of the conformational mixture is variable; however, the cone conformer is the greatest proportion of phenyl-resorcin[4]arenes and chair conformer of pyrogallol[4]arenes. The experimental evidence suggests that phenyl-substituted resorcinarene
Inclusion complexation between neurotransmitters with polyacetylated calix[4]pyrogallolarenes: 1H-NMR and crystallographic analysis
作者:José Luis Casas-Hinestroza、Adrián Pérez-Redondo、Mauricio Maldonado
DOI:10.1007/s11164-022-04735-4
日期:2022.7
Complexation between choline and betaine with acetylated calix[4]pyrogallolarenes was studied in DMSO via 1H-NMR spectroscopy and in the gas phase via electrospray ionization-mass spectrometry (ESI–MS). In the presence of acetylated calix[4]pyrogallolarene, especially if there is an alkyl chain on the lower rim of macrocycle, the formation of a very stable host–guest-type complex was observed. In this way, it was found that the affinity constant between O-acylated-tetra(propyl)calix[4]pyrogallolarene with choline or betaine was 45 or 135, respectively, however the complexation process with acetylated calix[4]pyrogallolarene with aromatic substituent on the lower rim, the results showed that there was a weak interaction with the studied neurotransmitters. From the results, the important role played by the acetyl group in the host–guest interaction with betaine was evident. By contrast, the values of the binding constants of choline were not any higher than unmodified calix[4]pyrogallolarenes. Suitable crystals of O-acylated-tetra(propyl)calix[4]pyrogallolarene were obtained and were characterized through an X-ray crystal structure determination and showed the formation of the inclusion complex O-acylated-tetra(propyl) calix[4]pyrogallolarene·DMSO, which crystallized with two additional molecules of dimethylsulfoxide, additionally the DRX data allowing us to establish that the conformation that it has is of a boat and that it is possibly retained in solution.
Microwave-assisted synthesis of resorcin[4]arene and pyrogallol[4]arene macrocycles
作者:Muriel Funck、Daniel P. Guest、Gareth W.V. Cave
DOI:10.1016/j.tetlet.2010.09.115
日期:2010.12
A series of resorcin[4]arene and pyrogallol[4]arene macrocycles have been synthesized efficiently within 5 min, affording crystalline products suitable for single crystal X-ray diffraction, utilising microwave irradiation in a 'one-pot' reaction whilst controlling the selective formation of the rccc cone stereoisomer. (C) 2010 Elsevier Ltd. All rights reserved.