Simple, fast and efficient synthesis of β-keto esters from the esters of heteroaryl compounds, its antimicrobial study and cytotoxicity towards various cancer cell lines
作者:R. Venkat Ragavan、V. Vijayakumar、K. Rajesh、B. Palakshi Reddy、S. Karthikeyan、N. Suchetha Kumari
DOI:10.1016/j.bmcl.2012.04.008
日期:2012.6
A series of beta-keto esters were synthesized from heteroaryl esters and ethyl acetate using LiHMDS as base at -50 to -30 degrees C. The increase in yields of cross condensed product were observed and the percentage of self condensed product was reduced drastically by applying the suitable base (LiHMDS), solvent and the minimum amount of ethyl acetate. All these beta-keto esters were characterized using H-1 NMR, C-13 NMR and mass spectral data. A plausible mechanism is also depicted to prove the formation of trans-esterified products. All the synthesized compounds were subjected to test for their cytotoxicity towards various cancer cell lines and also tested for their antimicrobial activity towards various bacterial and fungal strains and some of them were found to have promising activity. (C) 2012 Elsevier Ltd. All rights reserved.