Silica nanoparticles immobilized benzoylthiourea ferrous complex as an efficient and reusable catalyst for one-pot synthesis of benzopyranopyrimidines

•Synthesis of nanosilica immobilized benzoylthiourea iron complex (Fe(II)-BTU-SNPs).•High catalytic activity of Fe(II)-BTU-SNPs in synthesis of benzopyranopyrimidines.•Reusability of Fe(II)-BTU-SNPs without significant loss of its catalytic activity.

Benzoylthiourea Fe(II) complex was supported on silica nanoparticles and employed as a heterogeneous catalyst in preparation of benzopyranopyrimidines through one-pot condensation reaction of salicylaldehydes, malononitrile and secondary amines in EtOH, at room temperature. The prepared catalyst was characterized by BET, ICP, FT-IR, TGA, SEM-EDX, TEM and elemental analysis. The catalyst could be recovered easily and reused at least five times without significant loss of its catalytic activity

Graphical abstractBenzoylthiourea Fe(II) complex was supported on silica nanoparticles and employed as a heterogeneous catalyst in preparation of benzopyranopyrimidines through one-pot condensation reaction of salicylaldehydes, malononitrile and secondary amines in EtOH, at room temperature.Figure optionsDownload full-size imageDownload high-quality image (87 K)Download as PowerPoint slide