Mesoporous SBA-15 supported silver nanoparticles as environmentally friendly catalysts for three-component reaction of aldehydes, alkynes and amines with glycol as a “green” solvent

The mesoporous SBA-15 supported silver nanoparticles catalyst system with a highly ordered hexagonal mesostructure was prepared by an in situ reduction method using hexamethylenetetramine as mild and efficient reducing agent. These AgSBA-15 materials act as environmentally friendly catalysts in A3-coupling reactions of aldehydes, amines, and terminal alkynes with glycol as a “green” solvent. It is also found that the maximum reaction yield has been obtained for an average Ag-nanoparticle size of about 8 nm. The catalyst could also be recovered easily and used repetitively four times without significantly affecting the catalytic activity. The heterogeneous catalysts were fully characterized by N2 adsorption and desorption, XRD, TEM, ICP and XPS.

Mesoporous SBA-15 supported silver nanoparticles can catalyze A3-coupling reaction of aldehydes, alkynes and amines in more environmentally friendly medium with glycol as “green” solvent. The catalysts could be recovered easily and used repetitively four times. It is also found that the maximum reaction yield has been obtained for an average Ag-nanoparticle size of about 8 nm.Figure optionsDownload high-quality image (64 K)Download as PowerPoint slide