Synthesis and evaluation of quinonoid compounds against tumor cell lines
作者:Eufrânio N. da Silva、Bruno C. Cavalcanti、Tiago T. Guimarães、Maria do Carmo F.R. Pinto、Igor O. Cabral、Cláudia Pessoa、Letícia V. Costa-Lotufo、Manoel O. de Moraes、Carlos K.Z. de Andrade、Marcelo R. dos Santos、Carlos A. de Simone、Marilia O.F. Goulart、Antonio V. Pinto
DOI:10.1016/j.ejmech.2010.11.006
日期:2011.1
Thirty two compounds were synthesized in moderate to high yields and showed activity against cancer cells HL-60 (leukemia), MDA-MB435 (melanoma), HCT-8 (colon) and SF295 (central nervous system), with IC50 below 2 mu M for some compounds. The beta-lapachone-based 1,2,3-triazoles showed the best cytoxicity profile and emerge as promising anticancer prototypes. Insights about the reactive oxygen species (ROS) mechanism of anticancer action for some compounds were obtained by addition of 1-bromoheptane that deplete reduced glutathione (GSH) content and by using N-acetylcysteine that protects cells against apoptotic cellular death, as well by analysis of thiobarbituric acid reactive substances (TBARS) formation, and oxidative DNA damage after treatment detected by the comet assay with the bacterial enzymes formamidopyrimidine DNA-glycosylase (FPG) and endonuclease III (ENDOIII). (C) 2010 Elsevier Masson SAS. All rights reserved.
One-pot protocol for J-aggregated anthraimidazolediones catalyzed by phosphotungstic acid in PEG-400 under aerobic condition
A precise and productive one pot green protocol has been developed for the chemoselective synthesis of anthra[1,2-d]imidazole-6,11-diones using phosphotungstic acid (PTA) as a reusable catalyst on polyethylene glycol-400 (PEG-400) support under aerobic condition. It involves a simple synthetic procedure for a wide range of anthraimidazolediones from 1,2-diaminoanthraquinone and various aldehydes possessing