Clays, natural resources find applications in various fields: cosmetics, pottery, industry, building materials. Their use in organic chemistry as catalysts has shown their efficiency and contributed to the development of environmentally friendly chemical processes. However, it is necessary to characterize this materials to know its chemical composition and its physicochemical properties. Kaolin is widely used in pharmaceutical and medical applications. The date palm is the main crop of the oases of the Sahara. This culture is threatened by Bayoud, a date palm disease caused by Fusariumoxysporumalbedinis (Foa).
The study is carried out to test the catalytic efficiency of Cu-ZSM-5 zeolite catalyst on the reaction of Aza Michael under solvent-free conditions, at room temperature this reaction is most exploited in organic chemistry, b-amino -esters, ketones, nitriles are useful for the preparation of several natural bioactive products, antibiotics, and chiral auxiliaries, through the use of the porous material catalyst (zeolite Cu-ZSM-5), and the reaction of Aza Michael addition a series of amines on α, β-unsaturated methyl acrylate, we have synthesized new cc or c-heteroatom products, these compounds is an attractive area of researchers in synthetic organic chemistry, and we have developed new synthesis methodologies for the preparation of these products. The reaction was carried out with favourable conditions: ambient temperature, and without solvent, that the products, which are synthesized, gave us a high yield, and excellent chemoselectivity.
This work was conducted to evaluate catalytic efficiency of red clay of Adrar-Algeria zone as an effective green catalyst on the Aza Michael reaction. The Aza-Michael reaction is the addition of amine to α, β-unsaturated alkene was carried out using raw red clay from the Adrar-Algeria area as a catalyst to synthesize the new carbon-carbon or carbon-heteroatom bond containing products. The reaction was carried out with favorable conditions, ambient temperature, without solvent, and the protocol likes the environment, sothat the synthesized products provide high yields and excellent chemo selectivity.
Background Zeolites are crystallized aluminum silicates. Their structure consists of an arrangement of TO4 tetrahedral (T = Si, Al ...), creating a regular nonporous system made up of channels with a diameter of less than 1 nm and cages (the channel intersections). These materials were discovered by the mineralogist in 1756. These porous materials are used in the paper industry, in jewelry, and in other fields. Certain applications require pure materials with specific properties, hence the need to develop their synthesis. Zeolites are obtained hydrothermally at temperatures below 200°C. The dimensions of the pores are of the order of a nanometer, close to the dimensions of certain organic molecules which make these zeolitic materials find applications in various fields, separation by molecular sieving, purification by adsorption, cation exchange and catalysis. Result We are successful in the reaction of addition the series of amines to unsaturated alkenes, catalyzed by zeolite H-ZSM-5, the results show good products obtained with excellent yields, in short time, pure products can be obtained after filtering the catalyst and then removing the excess amines, the catalyst is recoverable, reactivated and reused several times for other addition reactions, the products were defined by 1 H NMR spectroscopy. Conclusion According to the results obtained. It can be said that the addition of various aliphatic or aromatic amines reacted successfully with alkenes, in the presence of the catalyst H-ZSM-5, to give the corresponding adducts with excellent yields in time and in perfect conditions, solvent-free and room temperature, so our H-ZSM-5 catalyst is effective, can meet our goal of adding amines to unsaturated carbonyl components.
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