Tellurium and selenium incorporated 5,10,15,20-meso-unsubstituted-21,23-ditellura/diselena coremodified porphyrinogens (N 2 Te 2 and N 2 Se 2 ), 5,10,15,20-meso-unsubstituted-21-tellura/selena coremodified porphyrinogens (N 3 Te and N 3 Se) and fully substituted meso-carbons porphyrinogens (N 2 Te 2 , N 2 Se 2 and higher analogs) are synthesized by 3 + 1 condensation of tellurophene/ selenophene dipyrranes and their corresponding diols in the presence of BF 3 -etharate or BF 3methanol. The meso-unsubstituted and substituted porphyrinogens were oxidized with chloranil/0.1% aqueous FeCl 3 in CHCl 3 at room temperature to obtain the corresponding porphines and porphyrins which are further reduced to corresponding chlorin and bacteriochlorin, whereas the fully mesosubstituted porphyrinogens were found to be good ligands for Hg 2+ . The structures of the products were characterized by IR, 1 H, 13 C, 125 Te, 77 Se NMR, CHN analysis, mass spectrometry and singlecrystal XRD.

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.

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Cobalt(II) phthalocyanine catalyzed one‐pot efficient synthetic procedure for the synthesis of 2‐substituted benzimidazoles, benzothiazoles and benzoxazoles has been developed by using molecular oxygen as an oxidant. Varieties of o‐substituted anilines were successfully used as the substrates for the current catalytic reaction and were transformed in good to excellent yields of products. Different electron rich and electron deficient benzyl alcohols are used as the substrates to give the excellent yield of products.

An efficient one-pot methodology for the synthesis of 3-aminoalkylated indoles catalyzed by metallophthalocyanines has been developed via a three component Mannich type reaction with secondary amines, aldehydes and indoles. The newer catalysts i. e. metallophthalocyanines were synthesized by tetramerization of xanthenedione substituted phthalonitrile in anhydrous N,N-dimethylformamide by conventional heating and microwave conditions and were characterized by different spectroscopic techniques. The aggregation behaviors of these metallophthalocyanines were studied at different concentration in dimethyl sulfoxide and it was observed that these metallophthalocyanines show monomeric behavior in DMSO. The catalyst was separated from the reaction medium, characterized and was successfully reused up to five catalytic cycles. It was observed that the catalyst is stable in the catalytic system. Based on observations, a suitable reaction pathway is proposed for the current reaction.