Synthesis, characterization, and biological evaluation of novel thiazole and pyrazole derivatives of quinoline-4-carboxylic acid as potential antimicrobial agents

Recent advances of thiazole hybrids in biological applications

Thiazoles have attracted much synthetic interest due to their wide variety of biological properties and are important members of heterocyclic compounds. In recent years, studies on the synthesis of thiazole compounds have been increasing because of the properties of this core. In particular, the hybrid structures in which the thiazole ring and the other nuclei are linked have gained popularity. Hybrid structures are formed by the combination of different groups of chemical reactivity and biological activity characteristics. In this review, we highlight recent developments related to hybrid structures containing a thiazole core, recently developed as anticancer, antibacterial, anti-inflammatory, analgesic, anti-tubercular, antialzheimer and antidiabetic compounds.

An efficient synthesis of 11-aryl-10-oxo-7,8,10,11-tetrahydro-1H-[1,2,3]triazolo [4′,5′:3,4]benzo[1,2-b][1,6]naphthyridine derivatives under catalyst-free conditions

A three-component reaction of an aromatic aldehyde, 1H-benzo[d][1,2,3]triazol-5-amine and tert-butyl 2,4-dioxopiperidine-1-carboxylate in refluxing EtOH under catalyst-free conditions furnishes the title compounds in high yields.

Novel double [3 + 2 + 1] heteroannulation for forming unprecedented dipyrazolo-fused 2,6-naphthyridines

A novel four-component strategy for the efficient synthesis of unprecedented dipyrazolo-fused 2,6-naphthyridines through a double [3 + 2+1] heteroannulation has been described. The bond-forming efficiency, accessibility, and generality of this synthesis make it highly valuable to assemble tetra-heterocyclic scaffolds.