The 90 kDa ribosomal S6 kinases (RSKs), especially RSK2, have attracted attention for the development of new anticancer agents. Through structural optimization of the hit compound 1 from our previous study, a series of barbituric acid aryl hydrazone analogues were designed and synthesized as potential RSK2 inhibitors. The most potent one, compound 9, showed a higher activity against RSK2 with an IC50 value of 1.95 mu M. To analyze and elucidate their structure-activity relationship, the homology model of RSK2 N-terminal kinase domain was built and molecular docking simulations were performed, which provide helpful clues to design new inhibitors with desired activities.
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