Synthesis, characterization, anti-proliferative activity and DFT study of 1H-benzo[f]chromene-2-carbothioamide derivatives

Thioamides in medicinal chemistry and as small molecule therapeutic agents

Thioamides, which are fascinating isosteres of amides, have garnered significant attention in drug discovery and medicinal chemistry programs, spanning peptides and small molecule compounds. This review provides an overview of the various applications of thioamides in small molecule therapeutic agents targeting a range of human diseases, including cancer, microbial infections (e.g., tuberculosis, bacteria, and fungi), viral infections, neurodegenerative conditions, analgesia, and others. Particular focus is given to design strategies of biologically active thioamide-containing compounds and their biological targets, such as kinases and histone methyltransferase ASH1L. Additionally, the review discusses the impact of the thioamide moiety on key properties, including potency, target interactions, physicochemical characteristics, and pharmacokinetics profiles. We hope that this work will offer valuable insights to inspire the future development of novel bioactive thioamide-containing compounds, facilitating their effective use in combating a wide array of human diseases.

Design, synthesis and bioactivity study on oxygen-heterocyclic-based pyran analogues as effective P-glycoprotein-mediated multidrug resistance in MCF-7/ADR cell

P-glycoprotein (P-gp) imparts multi-drug resistance (MDR) on the cancers cell and malignant tumor clinical therapeutics. We report a class of newly designed and synthesized oxygen-heterocyclic-based pyran analogues (4a-l) bearing different aryl/hetaryl-substituted at the 1-postion were synthesized, aiming to impede the P-gp function. These compounds (4a-l) have been tested against cancerous PC-3, SKOV-3, HeLa, and MCF-7/ADR cell lines as well as non-cancerous HFL-1 and WI-38 cell lines to determine their anti-proliferative potency.The findings demonstrated the superior potency of 4a-c with 4-F, 2-Cl, and 3-Cl derivatives and 4h,g with 4-NO2, 4-MeO derivatives against PC-3, SKOV-3, HeLa, and MCF-7/ADR cell lines.Compounds 4a-c were tested for P-gp inhibition and demonstrated significant vigour against MCF-7/ADR cells with IC50 = 5.0-10.7 μM. The Rho123 accumulation assay showed that compounds 4a-c adequately inhibited P-gp function, as predicted. Furthermore, 4a or 4b administration resulted in MCF-7/ADR cell accumulation in the S phase, while compound 4c induced apoptosis by causing cell cycle arrest at G2/M. The molecular docking was applied to understand the likely modes of action and guide us in the rational design of more potent analogs. The investigate derivatives showed their good binding potential for p-gp active site with excellent docking scores and interactions. Finally, the majority of investigated derivatives 4a-c derivatives showed high oral bioavailability, but they did not cross the blood-brain barrier. These results suggest that they have favorable pharmacokinetic properties. Therefore, these compounds could serve as leads for designing more potent and stable drugs in the future.