Synthesis and characterization of meso-substituted triazonoporphyrins

A simple one-pot three-component synthetic protocol for the construction of novel meso-substituted porphyrintriazone conjugates has been developed. The reaction of 5-(4-aminophenyl)-10,15,20-triphenylporphyrin with formaldehyde and N,N'-disubstituted urea or thiourea derivatives in THF at reflux temperature afforded the corresponding new triazonoporphyrins in moderate yields. All the prepared products were characterized by IR, H-1 NMR and mass spectrometry.