N-butyl Pyridinium Bromide Ionic Liquid Assisted Preparation of Cobalt Oxide: An Efficient Nanocatalyst for the Synthesis of Tetrahydrobenzo[a]xanthen-11-one Derivatives

Subject Areas :

Mitra Darband ¹ , Elham Thanpesar ² , Rashid Badri ³ , Haleh Sanaei shoar ⁴

1 - Department of Chemistry, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
2 - Department of Chemistry, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
3 - Department of Chemistry, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
4 - Department of Chemistry, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran

Received: 2022-03-14 Accepted : 2022-03-14 Published : 2021-06-01

Keywords: Ionic liquid, Nanocatalyst, Xanthene, Cobalt oxide, N- butyl pyridinium bromide,

Abstract :

An efficient and green protocol for the synthesis of tetrahydrobenzo[a]-xanthen-11-one derivatives by one-pot, three-component coupling reaction of aromatic aldehydes, dimedone, and 2-naphthol at 100 °C under solvent-free conditions in the presence of Co3O4 nanocatalyst is described. Cobalt oxide nanocatalyst was synthesized using a simple reflux method in an aqueous medium using a pyridinium-based ionic liquid, N-butyl pyridinium bromide. Morphology, structure, and particle size of Co3O4 nanocatalyst are characterized by FE-SEM, FT-IR, and XRD spectroscopy. The present methodology offers several advantages such as high yields, short reaction times, and simple workup.