مشخصات پژوهش

In recent years, developing routs to produce materials based on green chemistry which minimizes pollution have been focused.1 to reach these goals, the development of heterogeneous catalysts in the synthesis of organic compounds is highly investigated due to the ease of handling, reusability and simple work-up. Therefor Immobilization of metal on various inorganic to produce heterogeneous catalytic systems has been widely reported. Recently, chitosan (Cs) as a biological polymer has been found to be the most abundant natural amino polysaccharide that is usually obtained by deacetylation of chitin. It has attracted significant interest due to its green properties, safety, non-toxicity, biocompatibility, biodegradability, low immunogenicity, stability and ability of chelation. In continuation of our efforts to synthesize of novel catalysts 2 for applying in the synthesis of heterocyclic ring we wish to design and synthesis molebdinium supported chitosan Ch-MoO as an efficient catalyst for the synthesis of 1,4-dihydropyridine through the condensation reaction of aldehydes, ethyl acetoacetate, ammonium acetate under solvent free condition at 80° C (Scheme 1).