Continued research on pyrazoline derivatives with excellent biological activities has encouraged us to design and synthesize 1,3,5-trisubstituted pyrazoline series introducing NiFe2O4.Cu(OH)2 magnetic nanocomposite as a heterogeneous catalyst by the combination of highly substituted aryl aldehydes, substituted acetophenones, and acetyl hydrazine hydrate under ultrasound irradiation at 50oC. The NiFe2O4.Cu(OH)2 magnetic nanocomposite materials are characterized by […]
An efficient synthesis of polyhydroquinoline derivatives is achieved via Hantzsch condensation reaction between aldehydes, dimedone, ethyl acetoacetate and ammonium acetate in the presence of catalytic amount of SFHS in ethanol. This method gives remarkable advantages such as shorter reaction time, simple workup procedure and good to excellent yields. Furthermore the catalyst can be recovered conveniently […]
