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چکیده
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Pyranoring formation with Alkyl amino pyridine-functionalized NaY zeolite Zahra Kalateha , Mohammad Ali Bodaghi Farda , Mojgan Zendehdel*a a Department of Chemistry, Faculty of Science, Arak University, Arak 38156-8- 8349; Iran *Corresponding author: m-zendehdel@araku.ac.ir 1. Introduction Homogeneous organic catalyst such as Alkyl amino pyridines have been used as active catalysts for many different organic reactions. The use of these soluble catalysts has variable drawbacks such as purification of the final product (s) from the reaction mixture and further catalyst recyclability which offer considerable complexity to the reaction that may render it industrially unacceptable. Thus, the heterogonous catalyst are a logical step to avoid these problems. The recoverability and reusability offered by heterogeneous systems, to give high yields in short times and sometimes without the need for organic material, lead to green chemistry [1] In the present work, alkyl amino pyridin-functionalized NaY zeolite has been prepared. This catalyst was used in the synthesis of 2-amino-4H-chromene derivatives . 2. Experimental alkyl amino pyridin-functionalized NaY zeolite has been prepared. The structure of the functionalized zeolite was characterized by some techniques such as FT-IR, FE-SEM, XRD, CHN and TGA analysis. The powder separated and washed with ethanol. The elemental analysis of modified compounds shows the molar ratio that confirmed immobilized amine on the porous material structure. This solid basic catalyst was used in the synthesis of 2-amino-4H-chromene derivatives through the multicomponent reactions with aldehydes, malononitrile and β-naphtole under solvent-free condition and the temperature of reaction was 100 °C. 3. Results and discussion The effect of the catalyst on the efficiency of multi component reaction shows in the table 1. High conversion was achieved at moderate temperatures and without solvent. Table 1. The effect of the catalyst on the efficiency of m
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