The biological activity of flavone has been enhanced by introducing heteroaryl moiety in C-2 position of chromone derivatives. Thus, 2-(1H-Indol-3-yl)-4H-chromen-4-one derivatives (6a-e) and 2-(2chloroquinolin-3-yl)-4H-chromen-4-one derivatives (7a-e) were synthesized from corresponding chalcone. They were structurally confirmed by analytical and spectral data and evaluated for their antimicrobial activities. The results showed that this skeletal framework exhibited marked potency as antimicrobial agents.

No abstract

Key indicatorsSingle-crystal X-ray study T = 293 K Mean (C-C) = 0.004 Å R factor = 0.048 wR factor = 0.166 Data-to-parameter ratio = 13.4For details of how these key indicators were automatically derived from the article, see

A series of 4-hydroxy-3,4-dialkyl-2,6-diaryl-piperidine (7-12) have been synthesised by reduction of 3-alkyl-2,6-diarylpiperidin-4-one using the Grignard reagent. Structural assignments and conformational analysis of the compounds were established based on the spectral studies. All the piperdin-4-ol derivatives (7-12) were assayed for antibacterial, antifungal and anthelmintic activities and they exhibited significant results.

The association of dyes with health related problems is not a new phenomenon. The effectiveness of carbon adsorption for dye removal from textile effluent has made it an ideal alternative to other expensive treatment methods. The preparation of activated carbon from agricultural waste could increase economic return and reduce pollution. Cassava peel has been used as a raw material to produce activated carbon. The study investigates the removal of malachite green dye from its aqueous solution. The effects of condition such as adsorbent dosage, initial dye concentration, pH and contact time were studied. The adsorption capacity was demonstrated as a function of time for malachite green from aqueous solution by the prepared activated carbon. The results showed that as the amount of the adsorbent was increased, the percentage of dye removal increased accordingly. Higher adsorption percentages were observed at lower concentrations of malachite green dye. Silver nitrate treated cassava peel showed a better performance compared to Sulphuric acid treated and raw carbons, thus making it an interesting option for dye removal textile effluent.