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Fe3O4-CTAB NPs have been applied as a competent catalyst for one-pot synthesis of nitriles directly from aldehydes. The present investigation describes the synthesis of nitriles by combination of aromatic/aliphatic/heterocyclic aldehydes and hydroxylamine hydrochloride in the presence of iron oxide nanocatalyst in DMF under reflux condition. Fe3O4-CTAB NPs were prepared by reported method and characterized by FE-SEM, TEM, and XRD analysis. The amount of Fe in Fe3O4-CTAB was quantified by Atomic Absorption Spectroscopy (AAS). The protocol endow with excellent yield of products along with simple reaction set up and economically adept alternative approach.

A series of substituted benzimidazoles were efficiently prepared by combining 1,2-phenylenediamine with aryl, heteroaryl aldehydes in the presence of catalytic amount of MgCl 2 ·6H 2 O. The advantages of this new protocol are high conversion, clean reaction profile, use of less toxic catalyst, low cost, and environment friendly. The method is very simple mild and applicable to aryl as well as heteroaryl aldehydes without significant difference.

γ-Maghemite-silica nanocomposite has been applied as a green catalyst to synthesize variety of aromatic N -heterocycles under solvent free conditions. Characterization was done by modern analytical tools (UV, IR, AAS, DSC, EDXRF, powdered XRD, EPR, Mossbauer and TEM). Mild reaction conditions and recyclability have made the present protocol both environmentally and economically viable.

Fe3O4-CTAB NPs have been applied as a competent catalyst for one-pot synthesis of nitriles directly from aldehydes. The present investigation describes the synthesis of nitriles by combination of aromatic/aliphatic/heterocyclic aldehydes and hydroxylamine hydrochloride in the presence of iron oxide nanocatalyst in DMF under reflux condition. Fe3O4-CTAB NPs were prepared by reported method and characterized by FE-SEM, TEM, and XRD analysis. The amount of Fe in Fe3O4-CTAB was quantified by Atomic Absorption Spectroscopy (AAS). The protocol endow with excellent yield of products along with simple reaction set up and economically adept alternative approach.

A new facile protocol is reported for the condensation of 1,2-phenylenediamine with aryl- and hetaryl aldehydes to produce benzimidazoles.