RESUMO
Conventionally, Starting as an vanillin condensed with acetyl acetone by using tributyl borate, boric anhydride and butyl amine then reaction mixture was allowed to stand for overnight at room temperature, after workup it convert yellowish product. Similarly, Non-conventionally, Acetyl acetone, boric acid, anhydrous Sodium sulfate mixed in toluene then substituted aromatic aldehydes added with n-BuNH2, formed mixture irradiated to MWI, after workup, final compound was collected. Second method is environmentally benign gives good yields of curcumin analogues under microwave condition. The reaction performed in less time of reaction, cleaner, no side product, good to excellent yield of product.
RESUMO
The research work was involved in rapid and efficient procedure for the attachment of barbituric acid with arylidene acetophenone under microwave irradiation (MWI) and conventional heating. The result showed that the time was reduced from the conventional 24 hours to 5-10 minutes. In conventional heating, the yield of the compounds 2a-2e were very poor (75-81%), but in MW methods the yields were observed 96.48-98% which was comparatively too high. The structures of the compounds were characterized by FT-IR, 1H-NMR spectral data. The antimicrobial and cytotoxic activities of the synthesized compounds were also investigated. Staphylococcus aureus, Bacillus megaterium, Escherichia coli and Pseudomonas aeruginosa revealed the zone of inhibition were 6-12 mm where sample concentration was 100 μg/disc. However, cytotoxic analysis, the mortality 47-95% were appeared when sample concentration were 0.78-25 (μg/ml) and more than 50 (μg/ml) concentration showed 100% mortality. The presence of a reactive and unsaturated ketone function in synthesized compounds was found to be responsible for their potential antimicrobial and cytotoxic activity.