Mini-Reviews in Organic Chemistry - Volume 21, Issue 3, 2024

In the field of Chemistry, it is essential to study molecules with biological activity on chronic degenerative diseases to design drugs that help to improve the health of people with diseases such as diabetes, arterial hypertension, rheumatoid arthritis, cancer, among others; and that in turn may have fewer side effects. Diabetes mellitus is a serious metabolic disorder that affects millions of people worldwide; due to the illness severe affectations, there is a great interest in improving pharmacological treatments (hypoglycemic drugs) used in this disease. Nowadays, it has been reported that metallodrugs and drug-cyclodextrin inclusion compounds have higher therapeutic activity than free drugs, with fewer side effects. In the present work, we compile, analyze, synthesize and discuss published information on the hypoglycemic drugs Metformin (C4H11N5), Chlorpropamide (C10H13ClN2O3S) and Glibenclamide (C23H28ClN3O5S) complexed with metal ions or included in cyclodextrins in aqueous solution. Nowadays, this type of complex should be widely studied for the treatment of type 2 diabetes mellitus. Physicochemical and thermodynamic properties, synthesis, mechanism of action, as well as analytical studies on the interaction of hypoglycemic agents with different complexing agents, are discussed.

The silicon-nitride ceramics gain a lot of interest for applications under severe conditions due to their thermal stability, thermal shock resistance and chemical stability arising from the threedimensional lattice structure. The silicon-nitride ceramics can be synthesized from silicon-nitride preceramic polymers based on polysilazane (PSZ), as the ability to fabricate ceramic components of specific geometries is difficult to obtain otherwise. This review systematically summarized the applications of PSZ-based silicon-nitride preceramic polymers in the processing of functional materials. A particular focus is made on the relation between the chemical structure of polymer and the properties of the polymer-derived ceramic. The tailored properties as well as characteristics of ceramic are highlighted and the trend of nowadays research for the future evolution of silicon-nitride preceramic polymer was proposed.

Even though there has been an important evolution in the synthesis of oligosaccharides, the efficient and stereoselective study of glycosidic bonds through non-toxic, moderate, and inexpensive techniques is one of the most challenging fields in organic synthesis. Glycosyl reactions play a fundamental role in biological material and structure-activity relationships, having numerous medicinal chemistry applications. For this, interesting strategies have evolved over the years to control the stereoselectivity of glycosidic bonds, including the manipulation of different reaction elements, mainly promoters or catalysts, but also involving the nature of donors and solvents. This review looks at glycosylation methodologies in the last decade resulting in the specific formation of alpha or beta glycosidic bonds.

Piperidine and pyridine nuclei are essential heterocyclic systems and act as an essential underpinning for agriculture, medicines, industries, etc. The development of novel methods for the synthesis of these exemplary heterocyclic compounds and their respective hybrids, which show a wide range of biological activities, is a very fascinating theme. The derivatives of these pervasive nuclei are used as antibacterial, antimicrobial, antifungal, antimalarial, anticancer, antiproliferative, antihypertensive, antiparasitic, and many other agents. The hybrids of these nuclei have retained a distinct position in medicinal chemistry and are often incorporated in synthetic drug discovery. In this review, we have compiled relevant literature on different derivatives of piperidine and pyridine moieties and their biological activities.

Alkoxmethyl heterocycles play a significant role as bioactive compounds in pharmaceutical and bifunctional ligands in synthetic organic chemistry. N-Alkoxmethylation can lead toward multipurpose mixed acetals, natural product precursors, and task-specific functionalized ionic liquids. This report provides a comprehensive account of the synthesis and perspectives applications of alkoxymethyl azaheterocycles. The first part gives a detailed account of the different synthetic strategies employed to access N-alkoxy methyl heterocyclic compounds. The second part deals with their applications, owing to the unique reactivity of the alkoxymethyl group and the nature of heterocycle. Besides diverse biological and synthetic applications, alkoxymethyl benzotriazoles also provide substantial scope as a versatile anion stabilizer that can lead to diverse oxygen functionalities.