biginelli multicomponent condensation reaction promoted by 4,4ʹ-bipyridinium dichloride ordered mesoporous silica nanocomposite under solvent free conditions

in this paper, 4,4ʹ-bipyridinium dichloride  supported sba-15 (sba@bipy2+ 2cl-) was used for the synthesis of dihydropyrimidinones. the synthesized catalyst was characterized by ft-ir spectroscopy, scanning electron microscopy (sem), transmission electron microscopy (tem) and thermogravimetric analysis (tga). this nanocomposite was shown to be an efficient heterogeneous catalyst for the synthesis of dihydropyrimidinones derivatives via one-pot multicomponent method under solvent-free conditions. in addition, the catalyst can be recycled several times with no significant loss of catalytic activity.