Manganese-based magnetic catalysts have attracted considerable interest due to their high catalytic efficiency, magnetic recyclability, and eco-friendly nature in the synthesis of heterocycles.

This review manuscript examines magnetic nanocatalysts and their pivotal role in forming carbon‐sulfur (C−S) and carbon‐selenium (C−Se) bonds. The study delves into the latest advancements in the synthesis, characterization, and application of magnetic nanocatalysts, highlighting their unique advantages, including enhanced catalytic activity, superior selectivity, and easy recovery through magnetic separation, which align with the principles of green chemistry. Through a critical analysis of recent research findings, this review also explores the mechanistic pathways facilitated by these nanocatalysts, offering insights into their operational efficiency and potential for recyclability. The manuscript aims not only to catalog the current achievements in this burgeoning field but also to identify challenges and propose future directions for developing more efficient, sustainable, and versatile catalytic systems for C−S and C−Se bond formation. By encompassing a broad spectrum of magnetic nanocatalysts, ranging from bare magnets to functionalized and composite materials, this review is a comprehensive resource for researchers engaged in organic synthesis, catalysis, and sustainable chemistry.

Magnetic nanocatalysts (MNCs) represent sustainable platforms for synthesizing imidazo[1,2- a ]pyridine derivatives, key nitrogen-fused heterocycles with wide applications in medicinal chemistry, materials science, and agrochemistry.

At present, titanium dioxide nanoparticles (TiO2 NPs) find effective application in human consumables, pharmaceuticals, beauty products, cutting-edge healthcare, and dental care due to their non-toxic, non-allergenic, and biocompatible properties when in direct proximity to the human body. These NPs exhibit exceptional versatility in terms of their satisfactory chemical steadiness, cost-effectiveness, potent oxidation characteristics, elevated refractive index, and improved visual appeal. These NPs are produced using traditional techniques (both physical and chemical) as well as modern biological methods (biological, eco-friendly, and derived from biological sources), each carrying its own set of strengths and weaknesses in this current era. The importance of TiO2 NPs in the medical field encompasses applications in drug delivery, cancer treatment, orthopedic implants, biosensors, instruments, and devices. In dentistry, they play a crucial role as biomaterials in items like toothpaste, oral antibacterial solutions, teeth whitening products, and adhesives. Furthermore, TiO2 NPs hold a significant position in various dental specialties. They are utilized in orthodontics for wires and brackets, in endodontics for sealers and obturating materials, in maxillofacial surgeries for implants and bone plates, in prosthodontics for veneers, crowns, bridges, and acrylic resin dentures, and in restorative dentistry for glass ionomer cement (GIC) and composites.