Synthesis of two calix[4]arene diamide derivatives for extraction of chromium(VI)

BOZKURT S., Karakucuk A., Sirit A., Yilmaz M.

Tetrahedron, vol.61, no.44, pp.10443-10448, 2005 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 61 Issue: 44
  • Publication Date: 2005
  • Doi Number: 10.1016/j.tet.2005.08.072
  • Journal Name: Tetrahedron
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.10443-10448
  • Keywords: Calix[4]arene, Diamide, Dichromate anions, Solvent extraction
  • Uşak University Affiliated: Yes

Abstract

The synthesis of four diamide derivatives of the p-tert-butylcalix[4]arenes from the reaction of 5,11,17,23-tetra-tert-butyl-25,27-diethoxycarbonylmethoxy- 26,28-dihydroxycalix[4]arene 2 with various primary amines were reported. The 1H and 13C NMR, data showed that the synthesized compounds exist in the cone conformation. The complexing properties of these compounds toward Cr2O72-/HCr2O 7- anions are also studied. It has been observed that receptors 5 and 6 are better extractant than the compounds 3 and 4. The protonated alkyl ammonium form of 5 and 6 is an effective extractant for transferring HCr2O7-/Cr2O 72- anions from an aqueous phase into a dichloromethane layer. © 2005 Elsevier Ltd. All rights reserved.