Fe3O4@SiO2@(CH2)3N+H3HCOO- Nanoparticles: A Novel and Heterogeneous Nanocatalyst for Preparation of New (Methylsulfonyl)Benzopyranophenazin-3-Amine Derivatives

Abstract

An efficient synthesis of new (methylsulfonyl)benzopyranophenazin-3-amines via the condensation of 2-hydroxynaphthoquinone, 1,2-phenylenediamine, methylsulfonylacetonitrile, and arylaldehydes derivatives catalyzed by ionic liquid [(EtO)3Si–CH2–CH2–CH2–NH3 +][HCOO−] immobilized on magnetic Fe3O4@SiO2, as a novel heterogeneous nanocatalyst, was described. The novel nanocatalyst was characterized by FE-SEM, XRD, FT-IR, TGA‐DTG, and VSM techniques. The environmentally friendly protocol presented some advantages, such as a simple work-up and excellent yields. This nanocatalyst can be easily reused several times and recovered by an external magnet. The activity of the recoverable nanocatalyst remains intact even after five repeated runs.