Barbituric acid is a heterocyclic compound with various pharmacological and biological applications. This review paper provides a comprehensive overview of barbituric acid’s synthesis, reactions, and bio-applications, highlighting its multifaceted role in various fields. Many heterocyclic derivatives were formed based on barbituric acid, for instance, pyrano-fused pyrimidine derivatives, spiro-oxindole derivatives, chrome-based barbituric acid derivatives, and many more via the atom economic method, Michael addition reaction, Knoevenagel condensation reaction, etc. In the context of bio-applications, this review examines the production of a wide range of bioactive drugs like anti-histamine, anti-leprotic, sedative–hypnotic, anti-inflammatory, anti-urease, antiviral, anti-AIDS, antimicrobial, antioxidant, anticonvulsant, anesthetic agent, antitumor, and anticancer drugs using efficient multicomponent reactions. By showcasing the versatility and potential of this compound, it aims to inspire further research and innovation in the field, leading to the development of novel barbituric acid derivatives with enhanced properties and diverse applications, with coverage of the literature relevant up to 2024.

Trimetallic nanoparticles are a versatile class of nanoparticles that deliver enhanced stability and multifunctionality. Their structural and electronic properties makes them significant for energy conversion and biomedical applications.

This study investigates the environmentally friendly synthesis of Fe₃O₄ nanoparticles using basil leaf extract as a sustainable precursor. The resulting basil–Fe₃O₄ nanoparticles were extensively characterized through Fourier-Transform infrared, UV–Vis, scanning electron microscopy, energy-dispersive spectroscopy, X-ray diffraction, and VSM to verify their structural, morphological, and magnetic properties. Optical analysis showed a prominent absorption peak at 263 nm and a band gap energy of 3.87 eV, suggesting its potential for photocatalytic applications. The catalytic performance of basil–Fe ₃ O ₄ was tested in the synthesis of 2-benzylidene malononitrile derivatives under microwave irradiation, achieving up to 98% purity in crystalline form across 12 examples involving aromatic and heteroaromatic aldehydes with malononitrile. The catalyst exhibited excellent reusability with minimal loss of activity over several cycles, highlighting its potential for greener and more sustainable chemical processes. Additionally, the photocatalytic performance of basil–Fe₃O₄ was evaluated for the degradation of Congo red dye, achieving an impressive 97% degradation efficiency under UV irradiation. Kinetic analysis indicated a high regression coefficient and a significant reaction rate constant, confirming its superior activity. The limit of detection and limit of quantification were determined to be 32.8 and 99.16 mg·L ⁻¹ , respectively, affirming the method’s sensitivity and reliability for detecting Congo red dye. Remarkably, even a small amount (5%) of the catalyst enabled efficient degradation under low UV exposure, showcasing its potential for large-scale wastewater treatment. The dual functionality of basil–Fe₃O₄ nanoparticles in both organic synthesis and environmental remediation highlights its promise for sustainable advancements in green chemistry and wastewater treatment applications.

The growth of the environment depends upon developing greener and ecological methods for managing pollutants and contamination from industrial wastewater, which causes significant effects on human health. The removal of these pollutants from wastewater using nanomaterials covers an ecological method that is free from expensive and secondary pollution. In this report, we developed magnetic iron nanoparticles from Chenopodium glaucum (CG), which showed excellent adsorption capacity at pH 5 for selective Hg²⁺ and Pb²⁺ metal ions among various heavy metal ions, with maximum adsorption capacities of 96.9 and 94.1%, respectively. These metals’ adsorption process conforms to the Langmuir model, which suggests that monolayer adsorption transpires on CG–Fe₂O₃ nanoparticles. CG–Fe₂O₃ nanoparticles also act as an efficient and recyclable heterogeneous catalyst for one-pot synthesis of xanthene derivatives, yielding products with high yields (up to 97%) and excellent purity (crystalline form) within a short timeframe (6 min) using microwave irradiations (at 120 W).

The current study describes a novel and eco-conscious method to synthesize 1,4-dihydropyridine derivatives utilizing an aqueous micellar solution containing aluminum dodecyl sulfate, Al(DS)₃, using readily available starting material. The final products were synthesized with excellent yields within remarkably quick reaction durations, promoting remarkable atom economy and minimizing environmental impacts. The present protocol has several advantages over other methodologies in terms of high yield (up to 97%) with excellent purity. Further, the synthesized 1,4-DHPs exhibit favorable to excellent resistance against examined bacterial and fungal species. Intriguingly, polar groups on the phenyl ring (5b, 5c, 5i and 5j) make the 1,4-DHPs equally potent against the microbes as compared to the standard drugs.

The magnetically recoverable heterogeneous Fe₂O₃@cellulose@Mn nanocomposite was synthesized by a stepwise fabrication of Mn nanoparticles on cellulose-modified magnetic Fe₂O₃ nanocomposites, and the morphology of the nanocomposite was characterized through advanced spectroscopic techniques. This nanocomposite was investigated as a heterogeneous catalyst for the synthesis of medicinally important tetrazole derivatives through Knoevenagel condensation between aromatic/heteroaromatic aldehyde and malononitrile followed by [3+2] cycloaddition reaction with sodium azide. Thirteen potent (E)-1-aryl-2-(1H-tetrazol-5-yl)acrylonitrile derivatives are reported in this paper with very high yields (up to 98%) and with excellent purity (as crystals) in a very short period (3 min @ 120 W) using microwave irradiation. The present procedure offers several advantages over recent protocols, including minimal catalyst loading, quick reaction time, and the utilization of an eco-friendly solvent. Furthermore, the synthesized (E)-1-aryl-2-(1H-tetrazol-5-yl)acrylonitrile derivatives (4b, 4c, and 4m) are shown to have excellent resistance against various fungal strains over bacterial strains as compared to the standard drugs Cefixime (4 μg/mL) and Fluconazole (2 μg/mL).