Pyranoring formation with Alkyl amino pyridine-functionalized NaY zeolite

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 .