a water soluble, bronsted acid, 5-sulfosalicylic acid as an efficient organocatalyst was used for the synthesis of physiologically active 2-substituted benzimidazole derivatives from o-phenylenediamine and aromatic aldehydes in ethanol at reflux condition. cost-effectiveness, use of non-hazardous solvents, metal free and commercially available catalyst, single-step, environmentally friendly gre...

In this study, a novel and environmentally benign o-phenylendiamine stabilized on silica-coated Fe3O4 magnetic nanocatalyst (Fe3O4@SiO2@propyltriethoxysilane@o-phenylendiamine-SO3H/HCl) as a hybrid magnetic organometallic nanocatalyst has been synthesized. After that, the structure of this new catalyst was compl...

In this study, a novel and environmentally benign o-phenylendiamine stabilized on silica-coated Fe3O4 magnetic nanocatalyst (Fe3O4@SiO2@propyltriethoxysilane@o-phenylendiamine-SO3H/HCl) as a hybrid magnetic organometallic nanocatalyst has been synthesized. After that, the structure of this new catalyst was compl...

[B(OH)3]0.78[B(OH)2(OSO3H)]0.22 or (BSA) was simply prepared by addition of chlorosulfonic acid to commercial boric acid at room temperature. This cheap and green solid acid was used as an efficient catalyst for synthesis of acylals from aldehydes under solvent-free conditions at room temperature.

[B(OH)3]0.78[B(OH)2(OSO3H)]0.22 or (BSA) was simply prepared by addition of chlorosulfonic acid to commercial boric acid at room temperature. This cheap and green solid acid was used as an efficient catalyst for synthesis of acylals from aldehydes under solvent-free conditions at room temperature.

a green and efficient one pot, three component protocol for synthesis of naphthopyranopyrimidines by cyclocondensation of β-naphthol, aldehyde, and 6-amino-1,3-dimethyluracil using l-proline as a beneficial catalyst with high catalytic activity under solvent-free conditions at 100 °c is described. in this study, several types of aromatic aldehyde, containing electron-withdrawing groups as well ...

Abstract The development of deep eutectic solvent (DES) as a green medium and catalyst for sustainable organic synthesis is expanding due to environmental consciousness. DES components are inexpensive, easy synthesize, non-toxic, biodegradable, have tunable physicochemical properties. In this study, DESs were formed by mixture choline chloride (ChCl) hydrogen bond acceptor (HBA), while oxalic a...

Background and Aims: Gold nanoparticles have potential applications in the areas of medicine, target drug delivery, cancer diagnosis and therapy, electronic, etc. Recently, biological system is considered as an environmental friendly method for synthesis of stable nanoparticles. Methods: We demonstrated a biological system for formation of stable gold nanoparticle by using Cupriavidus necator w...