Synthesis of dihydropyrano[2,3-g]chromenes derivatives in present of nano Cu-MOF

In recent years, the synthesis and application of Metal Organic Framework (MOF) has attracted chemists, due to these compounds have unique properties in the field of catalyst and gas adsorbents1. Recently, the use of MOFs as heterogeneous catalysts in organic reactions has been considered more than before as the presence of metal and an organic ligand in their structures2. Chromenes and their derivatives are compounds that exhibit a good biological and antibacterial activity3. The chromene synthesis, in economical and optimal conditions, by recyclable heterogeneous catalysts is one of the perspectives examined by chemists. Herein, we report the synthesis of dihydropyrano[2,3-g]chromenes from the reaction between 2,5-dihydroxycyclohexa-2,5-diene-1,4-dione, aldehydes and malononitrile in the presence of nano Cu-MOF as catalyst in ultrasonic irradiation. The synthesized catalyst was characterized by SEM, PXRD, TGA.

Keywords:

Multicomponent reactions , Dihydropyrano[2 , 3-g]chromenes , Metal organic framework , Nanocatalyst.