In silico and in vitro anti-inflammatory evaluation of 2,6-bis-(3'-ethoxy, 4'-hydroxybenzylidene)-cyclohexanone, 2,6-bis-(3'-Bromo,4'-methoxybenzylidene)-cyclohexanone, and 2,6-bis- (3',4'-dimethoxybenzylidene)-cyclohexanone

The aim of this research is to design the new mono-carbonyl analogs of curcumin, synthesize the molecules, anddetermine its activity in cyclooxygenase inhibition in vitro and in silico. New design MACs were performed bythe Quantitative Structure–Activity Relationship (QSAR) study using the BuildQSAR program. 2,6-bis-(3ʹ-ethoxy,4ʹ-hydroxybenzylidene)-cyclohexanone, 2,6-bis-(3ʹ-Bromo, 4ʹ-methoxybenzylidene)-cyclohexanone, and 2,6-bis-(3ʹ,4ʹ-dimethoxybenzylidene)-cyclohexanone had been synthesized using aldol condensation reaction. The anti-inflammatoryassay was performed to measure the level of malondialdehyde. In silico studies were carried out to evaluate the activityof cyclooxygenase inhibition in cyclooxygenase-1 and cyclooxygenase-2 specific proteins. Molecular operatingenvironment program was used for protocol docking. The results of the QSAR study reveal the good relationshipof anti-inflammatory activities. The in vitro anti-inflammatory activities of 6-bis-(3ʹ-ethoxy, 4ʹ-hydroxybenzylidene)-cyclohexanone, 2,6-bis-(3ʹ-Bromo, 4ʹ-methoxybenzylidene)-cyclohexanone, and 2,6-bis-(3ʹ,4ʹ-dimethoxybenzylidene)-cyclohexanone indicate the promising potential to inhibit cyclooxygenase enzyme with IC50 13.53 μM, 11.56 μM,and 20.52 μM, respectively. The in silico evaluation showing that O atoms (47, from ketones) of 2,6-bis-(3ʹ-Bromo,4ʹ-methoxybenzylidene)-cyclohexanone interact with ARG120 and TYR355 through H acceptor.

In silico and in vitro assay of Hexagamavunon-6 analogs, Dibenzilyden-N-Methyl-4-piperidone as antibacterial agents

A new series of analogs Hexagamavunon-6 (HGV-6) was prepared and screened for antibacterial activity againstStreptococcus mutans (ATCC 25175), Escherichia coli (ATCC 25922), Bacillus subtilis (ATCC 6633), Psedomonasaeruginosa (ATCC 27853), Klebsiella pneumoniae, and Enterococcus faecalis (ATCC 29212) using disk diffusionmethod. The antibacterial results showed that 3,5-Bis-(2',4'-dichlorobenzilyden)-N-methyl-4-piperidone (1c)compound display significant inhibition and broad-spectrum antibacterial activity. This is in accordance with the insilico evaluation showing that compound 1c has a lower docking score than both compounds 1a and 1b. None of thetested compounds were as active as the reference standard drug Amoxicillin.