Synthesis and cytotoxic, anti-inflammatory, and anti-oxidant activities of 2′,5′-dialkoxylchalcones as cancer chemopreventive agents

In an effort to develop novel anti-tumor, or cancer chemopreventive agents, a series of 2',5'-dialkoxylchalcones were prepared by Claisen-Schmidt condensation of appropriate acetophenones with suitable aromatic aldehyde. In vitro screening revealed low micromolar activity (IC50) against several human cancer cell lines. Selective compound 10 induced an accumulation of A549 cells in the G(2)/M phase arrest which was well correlated with inhibitory activity against tubulin polymerization. Cytotoxic compounds 3 and 12 showed significant inhibitory effects on NO production in lipopolysaccharide (LPS)-activated RAW 264.7 macrophage-like cells while cytotoxic compound 10 revealed potent inhibitory effect on TNF-alpha formation in RAW 264.7 cells in response to LPS. Compounds 3 and 10 also showed significant inhibitory effects on xanthine oxidase. The present results suggested that compounds 3 and 10 were potential to be served as cancer chemopreventive agents. (C) 2008 Elsevier Ltd. All rights reserved.