γ-Fe₂O₃@Si-(CH₂)₃@mel@(CH₂)₄SO₃H as a magnetically bifunctional and retrievable nanocatalyst for green synthesis of benzo[c]acridine-8(9H)-ones and 2-amino-4H-chromenes

Abstract

The present work describes the synthesis and characterization of melamine functionalized with sulfonic acid supported on the magnetic nanoparticle, γ-Fe₂O₃@Si-(CH₂)₃@melamine@butyl sulfonic acid nanoparticle as a green and retrievable bifunctional catalyst. This catalyst was assigned by FT-IR, XRD, EDX, TEM, VSM, CHN, and TGA analyses. In addition, the catalytic activity of this new catalyst was investigated for the synthesis of 7,10,11,12-tetrahydrobenzo[c]acridine-8(9H)-ones from aliphatic and aromatic aldehydes, dimedone and 1-naphthylamine in excellent yields and 2-amino-4H-chromenes were provided using manufactured nanocatalyst in good-to-high yield under mild reaction condition. The γ-Fe₂O₃@Si-(CH₂)₃@melamine@butyl sulfonic acid heterogeneous catalyst showed the advantages such as very simple and eco-friendly due to use from magnetic nanoparticles as high reusability of the catalyst, magnetically separable catalyst, excellent yield, and mild reaction condition. The synthesis of some new derivatives of dibenzo[c]acridines and 2-amino-4H-chromenes in the presence of this nanocatalyst is also reported.

Keywords:

• γ-Fe₂O₃@Si-(CH₂)₃@melamine@butyl sulfonic acid
• nanoparticle
• melamine
• acridine
• chromene

Disclosure statement

No potential conflict of interest was reported by the authors.