Synthesis and characterization of partially substituted at lower rim phosphorus containing calix(4)arenes
The synthesis and characterization of several new phosphorus-containing partially lower rim substituted derivatives of 5,11,17,23-tetra(t-butyl) calix(4)arene (1) and 5,11,17,23-tetra(t-octyl)calix(4)arene (II), namely 5,11,17,23-tetra(t-butyl)-25,27-dihydroxy-26,28-bis(diphenylphosphinoyl-oxy) calix(4)arene (IV); 5,11,17,23-tetra(t-butyl)-25-hydroxy-26,27,28-tris(tetramethyldiamido- phosphinoyl-oxy) calix(4)arene (Vb); 5,11,17,23-tetra(t-butyl)-25,27-dihydroxy-26,28-bis(dimethyl-phosphinoyl- methoxy) calix(4)arene (VI); 5,11,17,23-tetra (t-octyl)25,27-dihydroxy-26,28-bis(dimethyl-phosphinoyl-methoxy) calix(4)arene (VII) are reported. The structure of the synthesized calix(4)arene derivatives are identified and confirmed by elemental analysis, IR, H-1, C-13, P-31(H-1) NMR spectroscopy and mass spectrometry as and X-ray crystallographic analysis of 5,11,17,23-tetra(t-butyl)25,27-dihydroxy-26,28-bis(dimethyl-phosphinoyl-methoxy) calix(4)arene VI. According to the NMR spectra, all calix(4)arenes are in cone conformation.
Keywords: calix(4)arenes ; phosphorus containing calixarenes ; phosphine oxide ; tetra(t-octyl) calix(4)arene ; X-ray analysis ; NMR-spectroscopy ; X-Ray ; Metal-Complexes ; Calix<4>Arenes ; Polymer ; Ligands ; Ions ; Conformation ; Macrocycles ; Ability ; Oxides
Record created on 2012-07-04, modified on 2016-08-09