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A green and efficient preparation method for the amino bisphosphonates is accomplished by simple mixing and stirring of diethylphosphite, triethylorthoformate and various amines in the presence of amberlyst-15 as catalyst at room temperature under solvent free conditions. The title compounds are characterized by IR, 1 H-, 13 C-, 31 P-NMR and mass spectra, also studied their antimicrobial and antioxidant activity.

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A convenient and efficient protocol has been developed for the synthesis of 2‐aroylindoles (3a, 3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i, 3j) in good yields by the reaction of 2‐aminoketones (1a, 1b, 1c) with phenacyl bromides (2a, 2b, 2c, 2d). The reaction success varied with different bases and solvents in both conventional and microwave methods. But finally, it was established that piperidine in DMF was an effective medium to carry out the reaction under microwave irradiation conditions.

A green and highly efficient methodology for the formation of the title compounds (IV) by one‐pot condensation of kojic acid, various aromatic aldehydes, and a cyclic 1,3‐dicarbonyl compound under microwave irradiation and solvent‐free conditions is presented.