SYNTHESIS AND EXTRACTION PROPERTIES OF PREORGANIZED HOST MOLECULES BASED ON TETRAAMIDES OF THIACALIX[4]ARENE
Template effect of alkali metal ions was employed to prepare three isomers of tetraamide of p-tertbutylthiacalix[4]arene: cone, partial cone and 1,3-alternate. It was demonstrated that pre-organization of four amide fragments attached to the calix[4]arene platform has a strong macrocyclic cooperative effect on the extraction ability of the title hosts Read more