Microwave assisted selective synthesis of (E)-1-(4-Chloro-7-hydroxy-2-aryl-2H-chromen-6-yl)-3-arylprop-2-en-1-ones and their antimicrobial activity
摘要:
A series of new (E)-1-(4-chloro-7-hydroxy-2-aryl-2H-chromen-6-yl)-3-arylprop-2-en-1-ones (2a-2f) have been synthesized by selective mono cyclization of 4,6-dicinnamoyl resorcinols (1a-1f) using Vilsmeier-Haack reagent under conventional heating and microwave irradiation. The structures of the synthesized compounds have been elucidated by elemental analysis, IR, H-1 NMR, C-13 NMR and Mass spectral data. The synthesized compounds were tested in vitro for antimicrobial activity.
Bis-chalcone analogues as potent NO production inhibitors and as cytotoxic agents
摘要:
Chalcones have a distinctive 1,3-diarylpropenone skeleton and exert numerous biological effects. Using a one-step Claisen-Schmidt condensation, we synthesized eleven bis-chalcones (3-13) and three acetyl chalcones (14-16) from substituted aldehydes and diacetylresorcinol. The compounds were tested for in vitro cytotoxic activity against four human cancer cell lines (A549, DU145, KB, and KB-VIN) and inhibition of NO production in lipopolysaccharide (LPS)-activated microglial cells. Among them, four compounds (3, 5, 6, and 13) showed significant cytotoxic activity with EC50 values ranging from 1.57 to 514 mu M, and seven compounds (3, 5-8, 10, and 13) displayed potent anti-inflammatory activity by inhibiting NO production with IC50 values ranging from 0.95 to 8.65 mu M. A mechanism of action study of active compounds 6 and 7 discovered that these compounds down-regulated iNOS expression by inhibiting p65 NF-kappa B activation/nuclear translocation due to prevention of ham degradation. Structure-activity relationship (SAR) findings are also discussed. Crown Copyright (C) 2011 Published by Elsevier Masson SAS. All rights reserved.
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