171058-95-0Relevant articles and documents
Synthesis and characterization of p-t-butyl calix[4]crown-4 and its double calix[4]arene dimer
Asfari, Zouhair,Thuery, Pierre,Nierlich, Martine,Vicens, Jacques
, p. 343 - 349 (1999)
The preparation, separation, characterization and crystal structure determinations of the 1+1 and 2+2 condensation products, p-t-butyl calix[4]crown-4 (1) and its dimer double calix[4]arene double crown-4 (2), resulting from the reaction of p-t-butylcalix[4]arene with triethylene glycol ditosylate in the presence of a base are reported.
Synthesis and evaluation of novel 1, 3-bridged calix[4]arene-crown ethers for selective interaction with Na+/K+ cations
Chawla, Har Mohindra,Hundal, Geeta,Kumar,Singh, Parminder
experimental part, p. 323 - 330 (2012/09/22)
Calix[4]arenes possessing electron-donating groups (OH and OR) at the lower rim when reacted with tosylated polyethers under basic conditions give the corresponding 1, 3-disubstituted calix[4]arene-crown ethers 2a-2h, in good yields. The binding properties of the synthesized 1, 3-bridged calix[4]arene-crown ethers for alkali metal cations have been investigated by atomic emission spectrometric analysis. It has been observed that recognition of sodium and potassium varies with the size of the polyether chain as well as the substituents on the free phenolics of the calix[4]arene-crown ether. The potassium/ sodium selectivity seems to be governed primarily by the size of the crown ring, relative hydrophobicity and cation-pinteraction capability to give efficiency order as 2a, 2d>2 h>2c, 2e>2b, 2f>2 g.
Facile synthesis of cone p-tert-butylcalix[4]arene-crown conformers
Alekseeva, Elena A.,Basok, Stepan S.,Mazepa, Alexander V.,Gren, Andrei I.
, p. 330 - 331 (2008/03/30)
The series of p-tert-butylcalix[4]arene-crowns in the cone conformation was synthesised in high yields under conditions producing disubstituted calix[4]arenes in the presence of K2CO3 in acetonitrile; the formation of calix-bis(crown)s and doubly(calix)-doubly(crown) in these reactions was established.