Novel and versatile methodology for synthesis of β-aryl-β-mercapto ketone derivatives as potential urease inhibitors

Flavonoids and related privileged scaffolds as potential urease inhibitors: a review

Infections caused by bacteria are a significant issue on a global scale, and imperative action is required to discover novel or improved therapeutic agents. Flavonoids are a class of plant-derived compounds that have a variety of potentially useful bioactivities. These activities include immediate antimicrobial properties, synergistic effect with antimicrobials, ferocious repression of pathogenicity, anti-urease activity etc. This review summarizes current studies concerning anti-urease actions of flavonoids as well as structural-activity correlation investigations of the flavonoid core structure. It is possible that if researchers investigate the many structural changes that may be made in flavonoid rings, they'll be able to build up novel compounds that have powerful and effective anti-urease properties.

Turanecio hypochionaeus: In Silico Studies, and Determination of Its Polyphenol Contents, Bioactivities, and Anti-Microbial Potential

The aim of this study was to identify and quantify the phenolic composition of Turanecio hypochionaeus Bosse and determine the anti-urease, anti-lipase, antidiabetic, anti-melanogenesis, antibacterial, and anti-Alzheimer properties. IC50 results for all enzymes were obtained between 0.234-116.50 µg/mL and and this plant inhibited HMG_CoA R and glucosidase enzymes more with IC50 values of 0.234 and 116.50 µg/mL, respectively. Among the 11 secondary metabolites identified in T. hypochionaeus extract, chlorogenic acid 255.459±1.17 µg g-ˡ), benzoic acid (56.251±1.98 µg g-ˡ), and catechin (29.029±0.27 µg g-ˡ ) were determined as the most abundant phenolic compounds. According to the results of the tested microorganisms, the plant extracts showed antimicrobial and antifungal properties in a dose-dependent manner. In molecular docking study, the interactions of active compounds extracting extracted from Turanecio hypochionaeus plant and showing activity against diverse metabolic enzymes were examined. The most active compound 1, (chlorogenic acid) has -12.80, -12.80, -12.60 and -12.00 kcal/mol binding energy value against HMG_CoA R, and α-amylase, α-glucosidase, and lipase, respectively.

The synthesis of chiral β-naphthyl-β-sulfanyl ketones via enantioselective sulfa-Michael reaction in the presence of a bifunctional cinchona/sulfonamide organocatalyst

Cinchona alkaloid-derived organocatalysts are widely employed in various asymmetric transformations, yielding products with high enantiopurity. In this respect, a bifunctional quinine-derived sulfonamide organocatalyst was developed to catalyze the asymmetric sulfa-Michael reaction of naphthalene-1-thiol with trans-chalcone derivatives. The target sulfa-Michael adducts were obtained with up to 96% ee under mild conditions and with a low (1 mol %) catalyst loading. Selected enantiomerically enriched sulfa-Michael addition products were subjected to oxidation to obtain the corresponding sulfones.

F. A review on the development of urease inhibitors as antimicrobial agents against pathogenic bacteria

Ureases are enzymes that hydrolyze urea into ammonium and carbon dioxide. They have received considerable attention due to their impacts on living organism health, since the urease activity in microorganisms, particularly in bacteria, are potential causes and/or factors contributing to the persistence of some pathogen infections. This review compiles examples of the most potent antiurease organic substances. Emphasis was given to systematic screening studies on the inhibitory activity of rationally designed series of compounds with the corresponding SAR considerations. Ureases of Canavalia ensiformis, the usual model in antiureolytic studies, are emphasized. Although the active site of this class of hydrolases is conserved among bacteria and vegetal ureases, the same is not observerd for allosteric site. Therefore, inhibitors acting by participating in interactions with the allosteric site are more susceptible to a potential lack of association among their inhibitory profile for different ureases. The information about the inhibitory activity of different classes of compounds can be usefull to guide the development of new urease inhibitors that may be used in future in small molecular therapy against pathogenic bacteria.