No abstract

No abstract

The catalytic efficiency of silver nanoparticles supported on chitosan as a green, robust, and efficient nanocatalyst for the direct synthesis of biologically active compounds, such as: imidazole derivatives as well as pyrazine scaffolds through multi-component reactions strategy, have been demonstrated. In this work, imidazole derivatives were achieved via pseudo four-component reactions by utilization of benzaldehydes, benzils, anilines, and ammonium acetate under solvent-free conditions. Moreover, pyrazine scaffolds were synthesized through a three-component reaction of phenylenediamine derivatives, isocyanides and various ketones in water. The main advantages of this protocol are the reusability of the catalyst, operational simplicity, mild reaction conditions, and high-yielding. Copyright

Two derivatives of a dipeptide-functionalized metal-organic framework were synthesized through isocyanide-based multi-component reactions from amine-containing MIL-101(Fe). The functionalized materials were characterized by means of Fourier transform infrared spectroscopy, X-ray diffraction Brunauer-Emmett-Teller measurements, thermogravimetric analysis, elemental analysis and scanning electron microscopy. The performances of these functionalized MIL-101(Fe) materials with different functions were evaluated for ibuprofen delivery during six days, showing a good ability for adsorption of significant content of the drug and very slow release.