Laccase-Catalyzed Dimerization of Hydroxystilbenes
作者:Chiara Ponzoni、Elisa Beneventi、Maria Rita Cramarossa、Stefano Raimondi、Giulia Trevisi、Ugo Maria Pagnoni、Sergio Riva、Luca Forti
DOI:10.1002/adsc.200700043
日期:2007.6.4
A series of hydroxystilbenes, analogues of the bioactive phytoalexin resveratrol, were synthesized and submitted to the catalytic action of a laccase from Trametes pubescens in a biphasic system made of ethyl acetate and acetate buffer. Oxidation took place at the 4′-hydroxy (4-hydroxy) position of the hydroxystilbenic moieties, followed by radical-radical coupling dimerization reactions. Most of the
Resveratrol-Related Dehydrodimers: Laccase-Mediated Biomimetic Synthesis and Antiproliferative Activity
作者:Vedamurthy M. Bhusainahalli、Carmela Spatafora、Malik Chalal、Dominique Vervandier-Fasseur、Philippe Meunier、Norbert Latruffe、Corrado Tringali
DOI:10.1002/ejoc.201200664
日期:2012.9
Seven resveratrol-related monomeric stilbenoids were submitted to biomimetic oxidative coupling in the presence of laccase from Trametes versicolor (TvL), and gave racemic dihydrobenzofuran dehydrodimers (±)-15 to (±)-21. These products, after spectral characterization, were submitted to an antiproliferativeactivity bioassay against SW480 human colon cancer cells. Five racemates were found to be active
Chemo-enzymatic synthesis of (<i>E</i>)-2,3-diaryl-5-styryl-<i>trans</i>-2,3-dihydrobenzofuran-based scaffolds and their <i>in vitro</i> and <i>in silico</i> evaluation as a novel sub-family of potential allosteric modulators of the 90 kDa heat shock protein (Hsp90)
considering their structural analogies to previously reported allostericmodulators, the sixteen new compounds synthesized in this work were tested in vitro for their potential stimulatory action on the ATPase activity of the molecular chaperone Hsp90. Combining experimental and computational results, we propose a mechanism of action for these compounds, and expand the structure–activity relationship (SAR) information