Calix[6]pyrrole and hybrid calix[n]furan[m]pyrroles (n+m=6): syntheses and host-guest chemistry

Chemistry. 2002 Jul 15;8(14):3148-56. doi: 10.1002/1521-3765(20020715)8:14<3148::AID-CHEM3148>3.0.CO;2-B.

Abstract

Calix[6]pyrrole 2 and the "hybrid systems" calix[3]furan[3]pyrrole 12, calix[2]furan[4]pyrrole 13, and calix[1]furan[5]pyrrole 14, have been synthesized by increasing conversion of the furan units present in the readily accessible calix[6]furan 3 to pyrroles. The host-guest chemistry of these novel macrocycles towards a number of anions, including halogen ions, dihydrogen phosphate, hydrogen sulfate, nitrate, and cyanide has been investigated in solution by (1)H NMR titration techniques and/or phase transfer experiments. The solid-state structures of the free receptors 2, 12, and 13, the 1:1 complexes of calix[6]pyrrole 2 with chloride and bromide, and the 1:1 complex of 14 with chloride are also reported.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Binding Sites
  • Calixarenes
  • Cyanides / chemistry
  • Furans / chemical synthesis
  • Furans / chemistry
  • Halogens / chemistry
  • Hydrogen Bonding
  • Ions / chemistry*
  • Macromolecular Substances*
  • Magnetic Resonance Spectroscopy
  • Molecular Structure
  • Nitrates / chemistry
  • Phosphates / chemistry
  • Porphyrins / chemical synthesis
  • Porphyrins / chemistry
  • Pyrroles / chemical synthesis
  • Pyrroles / chemistry
  • Sulfates / chemistry
  • Titrimetry

Substances

  • Cyanides
  • Furans
  • Halogens
  • Ions
  • Macromolecular Substances
  • Nitrates
  • Phosphates
  • Porphyrins
  • Pyrroles
  • Sulfates
  • calix(1)furan(5)pyrrole
  • calix(3)furan(3)pyrrole
  • calix(6)pyrrole
  • Calixarenes