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Background  Urease are responsible for several pathogenic states in human as well as in animals and its inhibition is utmost urgent. Clinically used drugs are associated with many side effects; recently several researches have shown that flavonoids have good urease inhibition properties. Morin, a natural flavonoid has been investigated for urease inhibition studies which includes designing of library of morin analogues and their in-silico evaluation with the help of Schrodinger’s maestro package of molecular docking software against crystallographic complex of plant enzyme Jack bean urease (PDB ID: 3LA4) followed by synthesis and in vitro evaluation.    Results  Best thirteen derivatives of morin were selected on the basis of their interaction energy and dock score for synthesis and further investigated for in-vitro antioxidant, urease inhibitory and  Anti - H. Pylori  activity. In-vitro results revealed that a large number of synthesized compounds were found to possess excellent antioxidant and urease Inhibition properties.    Conclusions  Among the synthesized compounds,  N - (2 - chlorophenyl) - N - ((4E) - 2 - (2,4 - dihydroxyphenyl) - 3,5,7 - trihydroxy - 4H - chromen - 4 - ylidene)thiourea  (M2b) and  N - (4 - bromophenyl) - N - ((4E) - 2 - (2,4 - dihydroxyphenyl) - 3,5,7 - trihydroxy - 4H - chromen - 4 - ylidene)thiourea  (M2i) were found to be most potent urease inhibitor and antioxidant with IC 50  value 10.74 ± 0.018, 11.12 ± 0.033 and 7.37 ± 0.024, 7.73 ± 0.015and 7.795 ± 0.003 µM. Derivative M2i exhibited good anti- H. pylori  activity having MIC = 500  μ g/ml and zone of inhibition 15.00 ± 0.00 mm as compared to standard AHA having MIC = 1000  μ g/ml and zone of inhibition 9.00 ± 0.50 mm determined against  H. Pylori  bacterium (ATCC 43504, DSM 4867) by well diffusion technique. Furthermore, molecular docking study explained the binding pattern of synthesized ligand within active cavity of jack bean protein and drug similarity was explained by ADME studies by quikprop module of molecular docking software.    Electronic supplementary material  The online version of this article (10.1186/s13065-019-0562-2) contains supplementary material, which is available to authorized users.

bmc chemistry

Molecular docking, synthesis, kinetics study, structure–activity relationship and ADMET analysis of morin analogous as Helicobacter pylori urease inhibitors