Serendipitous formation of novel class of dichromeno pyrano pyrimidinone derivatives possessing anti-tubercular activity against M. tuberculosis H37Rv

Insights into the recent progress in the medicinal chemistry of pyranopyrimidine analogs

Heterocycles containing the pyranopyrimidine motif have attracted the interest of researchers in recent decades due to their ability to synthesize and explore at a large scale to explore the biological diversity. Therefore, this review highlights the biological characteristics and synthetic approaches adopted to prepare pyranopyrimidine analogs in the last five years. Several novel preparation procedures have been summarized to synthesize these compounds using ionic, basic, or nanocatalysts or catalyst-free conditions to obtain these compounds in good yields. Pyranopyrimidines could also be used as ligands in the preparation of metal complexes with increased biological potency. The different sections include the antimicrobial, antitubercular, antimalarial, antiviral "SARS-CoV-2 inhibitors", antidiabetic, antitumor, cytotoxic, antiinflammatory, antioxidant, anticoagulant, urease inhibitory activities, and tyrosine inhibitors. The results are discussed based on the structure-activity relationships (SARs) and the mechanism of action.

Recent Advances in the Application of Barbituric Acid Derivatives in Multicomponent Reactions

Abstract:

Barbituric acid is a pyrimidine heterocyclic organic compound, which is pharmacologically active. It is important to build structures containing various medicinal activities. This compound attracts the scientific research community in organic synthesis. It can be used in the synthesis of polyheterocyclic, natural, medicinal compounds, and organic sensors. Herein, the utilization of barbituric or thiobarbituric acid in multicomponent reactions is reported from 2016-2021 in this manuscript.

Recent Developments on the Synthesis and Biological Activities of Fused Pyrimidinone Derivatives

Heterocyclic compounds constitute a unique class of organic compounds endowed with a wide range of synthetic and pharmaceutical applications. Pyrimidinones and their fused analogues have received focused attention in this regard, partly due to their mimicry of nucleobases which consequently forges their interesting medicinal properties. Over the years, the medicinal chemistry research community has experienced an upsurge in articles describing the exploration of these scaffolds to develop effective therapeutic agents. Several biological activities, including antimicrobial, antiviral, anticancer, antidiabetic, anti-inflammatory, anticonvulsive, and antihistaminic, have been well documented. This minireview presents a compendium of recent developments (2017-2020) focused on the synthesis and biological activities of fused pyrimidinones. The goal is to update medicinal chemists on the therapeutic relevance of fused pyrimidinones and the molecular architecture of clinic-worthy drug candidates. A brief account of the structure-activity relationships (SAR) revealed from different biological assays is also discussed.

Unveiling the Anti-tubercular Properties of Biscoumarins, through Biological Evaluation and Docking Studies

Background:

Biscoumarin scaffolds are known for their promising pharmacological properties. These compounds have not been studied for their activity against tuberculosis strains.

Objective:

Unveil the antitubercular properties of biscoumarin scaffolds.

Methods:

Biscoumarin derivatives (3a-3l) were synthesized using lemon juice as a catalyst and were investigated for their in-vitro anti-tubercular activity against the H37Rv strain of Mycobacterium tuberculosis using Microplate Alamar Blue Assay Method (MABA). Their binding interaction was investigated by Molecular Docking Studies using InhA with PDB-ID: 2NSD as target receptors in the H37Rv strain of Mycobacterium tuberculosis. These derivatives (3a-3l) were subjected to the neutrophil function test.

Results:

The results revealed that compounds 3b, 3c, 3d, 3f, 3i, 3j showed excellent activity with MIC 1.6μg/mL. Molecular docking interactions for their antitubercular activity proved that the derivatives (3a-3l) can easily bind into the pockets of the enzyme. Neutrophil function test signified that they exhibit moderate neutrophil functions assuring that they do not harm the functioning of Neutrophils.

Conclusion:

These studies have awakened the property of Biscoumarins as promising antitubercular scaffolds.