A Cobalt-Catalyzed Multicomponent Approach to Novel 2,3-Di- and 2,2,3-Trisubstituted 3-Methoxycarbonyl-γ-butyrolactones
作者:Camille Le Floch、Erwan Le Gall、Eric Léonel、Jihen Koubaa、Thierry Martens、Pascal Retailleau
DOI:10.1002/ejoc.201000698
日期:2010.9
one-pot, three-component synthesis of the title butyrolactones starting from aryl bromides, dimethyl itaconate, and either aldehydes or ketones is described. The cobalt-catalyzed domino process formally involves the in situ metalation of an aromaticbromide, conjugate addition onto dimethyl itaconate, an aldolization reaction with a carbonyl compound and a final cyclization into a five-membered lactone
Synthesis and cytotoxic evaluation of novel paraconic acid analogs
作者:Camille Le Floch、Erwan Le Gall、Eric Léonel、Thierry Martens、Thierry Cresteil
DOI:10.1016/j.bmcl.2011.09.092
日期:2011.12
A novel class of 2,3-tri- and tetrasubstituted gamma-butyrolactones analogous to paraconic acids has been synthesized in one step using a straightforward three-component reaction among aryl bromides, dimethyl itaconate and carbonyl compounds. The in vitro cytotoxic activity of representative compounds has been evaluated against a panel of human cancer cell lines (KB, HCT116, MCF7, HL60). While most molecules exhibit a low to moderate background activity on both KB and HL60 cancer cell lines, one compound shows increased antiproliferative activities against both cell lines with IC50 values in the 10(-7)-10(-6) mol/L range. An extended evaluation indicated that this compound also inhibits PC3, SK-OV3, MCF7R and HL60R cell growth in the same fashion. (C) 2011 Elsevier Ltd. All rights reserved.