Employing a click chemistry approach we have synthesized a novel triazole-linked cationic porphyrin-β-carboline conjugate which exhibited remarkable photocytotoxicity against the A549 cancer cell line (IC(50) = 60 nM).

An efficient and general protocol for the synthesis of diaryl sulfones via the metal-free coupling of readily available diaryliodonium salts and arenesulfinates in PEG-400 under microwave irradiation has been developed. Utilizing this metal-free and ecofriendly protocol, we have prepared various diaryl sulfones in high yields and shorter reaction times under mild conditions. Furthermore, the coupling of diaryliodonium with arenesulfinate salts with and without copper iodide provides a convenient access to various diaryl sulfones with high selectivity.

A Cu(i)-catalyzed azide-alkyne cycloaddition reaction (CuAAC) has been utilized to prepare novel triazole-linked cationic porphyrin-psoralen conjugates that exhibited significant photocytotoxicity against A549 cancer cells (IC50 = 84 nM).

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A facile and high yielding synthesis of porphyrin appended thiazoles 5 from the reaction of 5-(4-thiocarboxamidophenyl)-10,15,20-triphenylporphyrin with a-bromo ketones has been described. The fluorescence studies of synthesized porphyrin appended thiazoles 5 in chloroform indicate that porphyrin p system is not greatly perturbed by substitution of a thiazole moiety at meso-phenyl ring even in the excited state.