and anilines to give the triazenes. Azo couplings are achieved with quantitative yields by cautious co-grinding of solid diazoniumsalts with beta-naphthol and C-H acidic heterocycles, such as barbituric acids or pyrazolinones. Solid diazoniumsalts may be more easily applied in a stoichiometric ratio for couplings in solution. Co-grinding of solid diazoniumsalts with KI gives quantitative yields of
Different barbiturate derivatives linked to aryl hydrazone moieties as urease inhibitors; design, synthesis, urease inhibitory evaluations, and molecular dynamic simulations
thiourea (IC50 = 23 ± 1.7 μM) against urease. It was shown that 4-bromo substitution on the phenyl ring of barbiturate improved the inhibitory potency. Furthermore, based on the molecular dynamic studies, compound 4g depicted noticeable interaction with the urease active site and mobile flap residues through the barbituricacid moiety by coordinating toward the metal bi-nickel center and the essential