Recent Advances in Biomedical Applications of Biogenic Nanomaterials.

The synthesis of biogenic nanoparticles from readily available natural resources may have large demand in numerous fields including pharmaceuticals and medicine. The biogenic nanoparticles catch the attention of the scientific community due to their low cytotoxicity and biocompatibility. Chemical, physical, and greener methods are used for the synthesis of biogenic nanoparticles. Researchers used eco-friendly and nontoxic approaches in the synthesis of this nanoparticle. This nanomaterial-based medicine plays a vital role in the management of public health, including earlier detection of disease, therapeutics candidates in the treatment of cancer. Biogenic nanocomposites are environmentally benign candidates that include fabrication of various composites, detoxification, and act as a catalyst in the biodegradation process. In this review article, we emphasize the recently reported methods used for synthesis, summarizing their biomedical applications and commercial and environmentally benign applications. Synthetic strategies include greener, chemical, physical, and biogenic methods and their role in surface modifiers involves various biomedical, commercial, and environmental-related applications. Moreover, we glimpse existing status, key contests, and future perspectives.

L-Proline: A Versatile Organo-Catalyst in Organic Chemistry.

BACKGROUND: L-proline is a natural amino acid having secondary amine functionality and acts as a bifunctional catalyst (organo-catalyst). The amino-functional group acts as Lewis base type while carboxylic acids act as Brønsted acid type catalysts. It catalyzed different asymmetric syntheses, including known reactions such as Aldol condensation, Mannich reaction, Michael Addition, Knoevenagel condensation, Hantzsch synthesis, OXA-Michael Henry tandem, Ullmann reactions, Wieland-Miescher ketone synthesis, Robinson annulation, Biginelli reaction, α- amination. It is also an essential catalyst for synthesizing heterocyclic skeletons such as coumarin, spiro-oxindoles, imidazoles, benzimidazoles, quinoxalines, podophyllotoxin, benzothiazoles, isoxazolidines, phenothiazines, aziridine, indole, 1,5-benzodiazepines, pyridine, and quinazolines. OBJECTIVE: In this review, we had the objective to critically summarize the use of proline and proline derivatives as catalysts of multicomponent reactions performed in various media and leading to synthetically and biologically relevant heterocycles, a very important class of compounds that constitutes over 60% of drugs and agrochemicals. METHODS: All scholarly articles for L-Proline catalyzed reactions were retrieved from ScienceDirect, Google Scholar , PubMed, etc. Results and Conclusion: Given the importance of L-Proline based reactions, it has been observed to have tremendous applications in organic chemistry. It can also act as a 'Green catalyst'.

Synthesis, Molecular Docking, and In vitro Antimycobacterial Studies on N'-arylidene-4-nitrobenzohydrazides.

BACKGROUND: Mycobacterium tuberculosis (Mtb) is an organism that causes tuberculosis (TB). In 2019, 10 million individuals worldwide contracted tuberculosis, with 1.4 million people dying from the disease each year (World Health Organization, 2021). Hydrazones- hydrazide-based drugs have been shown to be bactericidal against M. tuberculosis replication. OBJECTIVES: We herein intended to synthesize a series of acid hydrazones (3a-3l) by condensing 4-nitrobenzohydrazine with substituted aromatic acids in ethanol at room temperature. MATERIALS AND METHODS: All newly synthesized compounds were characterized by standard spectroscopic techniques. Synthesized compounds were then tested for anti-mycobacterial activity against H37Rv strains. Molecular docking analysis was performed for three crystal structures of 1ENY, 1TED and 2FUM Mycobacterium tuberculosis receptors. RESULTS: Among all tested molecules, 3i (MIC: 50 µg/mL) and 3b (MIC: 50 µg/mL) were found to be the best ligands for further development of new anti-TB drug. We found that our proposed molecules have higher docking scores, corresponding standard anti-TB agents, such as ciprofloxacin and isoniazid. Synthesized compounds were found to have druglikeness properties when tested with Lipinski's filter for drug-likeness. CONCLUSION: Our current study proposes N'-arylidene-4-nitrobenzohydrazides as anti-TB agents. Agents with such system can be developed in future for development into active lead molecules.

Recent Advances in Synthesis and Anticancer Potential of Triazole-Containing Scaffolds.

Cancer is the most lethal disease that may be found anywhere globally. Approximately 10% of individuals die due to cancer of various types, with 19.3 million new cancer cases and 10 million deaths reported in 2020. More than 100 medications are commercially available for the treatment of cancer, but only a few candidates have high specificity, resulting in several side effects. The scientific community has spent the past decades focusing on drug discovery. Natural resources are used to isolate pharmaceutically active candidates, which are then synthesized in laboratories. More than 60% of all prescribed drugs are made from natural ingredients. Unique five-membered heteroaromatic center motifs with sulfur, oxygen and nitrogen atoms are found in heterocyclic compounds, such as indazole, thiazole, triazole, triazole, and oxazole, and are used as a core scaffold in many medicinally important therapies. Triazole possesses a wide range of pharmacological activities, including anticancer, antibacterial, antifungal, antibiotic, antiviral, analgesic, anti-inflammatory, anti-HIV, antidiabetic, and antiprotozoal activities. Novel triazole motifs with a variety of biological characteristics have been successfully synthesized using versatile synthetic methods. We intend here to facilitate the rational design and development of innovative triazole-based anti-cancer medicines with increased selectivity for various cancer cell lines by providing insight into various ligand-receptor interactions.