Precision in stereochemistry: the integral role of catalytic asymmetric Biginelli reaction in crafting enantiomerically pure dihydropyrimidinones.

One well-known multicomponent reaction that is helpful in the synthesis of dihydropyrimidinones (DHPMs), important molecules in organic synthesis and medicinal chemistry, is the Biginelli reaction. Because of their wide range of biological activities, DHPMs are regarded as essential chemicals. A great deal of research has been done in the last few decades to find ways to produce enantiomerically pure DHPMs because of their notable and focused target-oriented biological activities. In this reaction, numerous structural variants and catalysts have been employed in a range of solvents to yield an enormous number of Biginelli-type compounds. In the present review, the available catalysts in the literature including ionic liquids, Lewis acids, and organocatalysts for the Biginelli reaction and synthesis of a large number of asymmetric compounds since 2003 are summarized.

A Comprehensive Examination of Heterocyclic Scaffold Chemistry for Antitubercular Activity.

Tuberculosis is a communicable disease which affects humans particularly the lungs and is transmitted mainly through air. Despite two decades of intensive research aimed at understanding and combating tuberculosis, persistent biological uncertainties continue to hinder progress. Nowadays, heterocyclic compounds have proven themselves in effective treatment of tuberculosis because of their wide range of biological and pharmacological activities. Antituberculosis or antimycobacterial agents encompass a broad array of compounds utilized singly or in conjunction to combat Mycobacterium infections, spanning from tuberculosis to leprosy. Here, we summarize the synthesis of various heterocyclic compounds which includes the greener synthetic route as well as use of nano compounds as catalyst along with their anti TB activities.

Theoretical and Experimental In-vitro Studies of Novel Thiophene Based Organotellurium(IV) Complexes.

Schiff bases are one of the important classes of organic compounds containing imine or azomethine functional groups with potential biological applications in medicinal chemistry. Nowadays, these compounds have attracted the scientific community's attention due to their ability to act as ligands in the formation of stable metal complexes with significant biological activity. In this connection, we have designed and synthesized six novel thiophene-based organoltellurium (IV) complexes using a novel N-((5-methylthiophen-2-yl) methylene)-2-nitroaniline (5MTCONA) schiff base. These complexes underwent analytical investigation (TGA, Powder XRD, SEM, EDAX) as well as spectral analysis (FT-IR, NMR, Mass spectrometry, UV-Vis). The in-vitro pharmacological evaluation of these compounds has been carried out as antimicrobial and antioxidant agents. To further corroborate our findings, we have implemented computational analyses (Semi empirical PM3 method, Molecular Docking, and ADMET) of all the compounds with Spartan-14, Hex-8.0., Swiss ADME software. Precisely, our study integrates experimental and theoretical aspects, offering innovative insights in the field of pharmaceutical sciences.

A Study on Synthesis of Chalcone Derived -5- Membered Isoxazoline and Isoxazole Scaffolds.

Chalcone-derived isoxazole scaffolds remain the central focus due to their greater biological, clinical, and pharmacological properties. The present study reviews the synthesis of various chalcone derived - 5- membered isoxazoline and isoxazole scaffolds with the available literature until 2021.