title: Synthesis of 21,23-selenium- and tellurium-substituted 5-porphomethenes, 5,10-porphodimethenes, 5,15-porphodimethenes, and porphotrimethenes and their interactions with mercury.
abstract: The 3+1 condensation of symmetrical 16-Selena/telluratripyrranes with symmetrical selenophene-2,5-diols/tellurophene-2,5-diols in the presence of BF3-etheratre or BF3-methanol followed by oxidation with DDQ gave 5,10-porphodimethenes, whereas the process with unsymmetrical selenophene-2,5-diols/tellurophene-2,5-diols gave 5-porphomethenes. In addition, the reaction of unsymmetrical 16-Selena/telluratripyrranes with symmetrical selenophene-2,5-diols/tellurophene-2,5-diols gave the corresponding porphotrimethenes, whereas the process with unsymmetrical selenophene-2,5-diols/tellurophene-2,5-diols gave the 5,15-porphodimethenes. The structures of different products were characterized by IR, (1)H and (13)C NMR, (1)H-(1)H COSY, CHN analysis, and mass spectrometry. The binding of mercury with the calix[4]phyrins mentioned above had been observed in the decreasing order of porphodimethenes > porphomethenes > porphotrimethenes by UV-vis and (1)H NMR spectroscopy.
authors: Bioorganic Research Laboratory, Department of Chemistry, University of Delhi, Delhi 110007, India.
authors: Sohail
authors: S
authors: Ahmad
authors: Bioorganic Research Laboratory, Department of Chemistry, University of Delhi, Delhi 110007, India.
authors: Kumar Karitkey
authors: KK
authors: Yadav
authors: Bioorganic Research Laboratory, Department of Chemistry, University of Delhi, Delhi 110007, India.
authors: Soumee
authors: S
authors: Bhattacharya
authors: Bioorganic Research Laboratory, Department of Chemistry, University of Delhi, Delhi 110007, India.
authors: Prashant
authors: P
authors: Chauhan
authors: Bioorganic Research Laboratory, Department of Chemistry, University of Delhi, Delhi 110007, India.
authors: S M S
authors: SM
authors: Chauhan
mesh_terms: D000438:Alcohols / Q000737:chemistry*; D047250:Calixarenes / Q000737:chemistry*; D004980:Ethane / Q000031:analogs & derivatives / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008697:Methane / Q000031:analogs & derivatives / Q000737:chemistry*; D015394:Molecular Structure; D010084:Oxidation-Reduction; D012643:Selenium / Q000737:chemistry*; D013691:Tellurium / Q000737:chemistry*
chemical_list: D000438:Alcohols; D047250:Calixarenes; D012643:Selenium; D004980:Ethane; D013691:Tellurium; D008697:Methane