immobilization and dft studies of tin chloride on uio-66 metal–organic frameworks as active catalyst for enamination of acetylacetone

An efficient synthetic method for the preparation of β-enaminones catalyzed by immobilization of sncl2 on zr-metal–organic frameworks (uio-66 mof) and designated as snuio66 is described. also the prepared catalyst was characterized by fourier transform infrared spectroscopy, x-ray photoelectron spectroscopy (xps), energy-dispersive x-ray spectroscopy and n2 adsorption and desorption techniques. xps and dft studies on sn uio66 were consistent with the immobilization of sn chloride as sniv on mof. a variety of β-enaminones were synthesized via reaction of primary aromatic amines with acetylacetone. it was found that snuio66 shows moderate-to-high catalytic activity for enamination reactions. the catalyst was found to be reusable up to four catalytic cycles without any appreciable loss in activity.