Novel synthesis of hybrid calixphyrin macrocycles
The reaction of benzaldehyde with excess pyrrole at room temperature in the absence of solvent affords a mixture of meso-substituted polypyrranes species. After separation by column chromatography, these may be used to prepare a range of calix[4]phyrin macrocycles by condensation with acetone under conditions of acid catalysis.
Bucher
C
Department of Chemistry and Biochemistry, Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, Texas 78712-1167, and Department of Analytical Chemistry, Technical University, 166 10 Prague 6, Czech Republic.
Seidel
D
Lynch
V
Kral
V
Sessler
JL