omega-[(4-Phenyl-2-quinolyl)oxy]alkanoic acid derivatives: a new family of potent LTB4 antagonists

Access to quinolinones via DMAP-catalysed cascade reaction of 2-substituted benzoic acids with organic azides

Herein, we report a DMAP-catalysed Curtius rearrangement and intramolecular cyclisation cascade reaction of 2-substituted aryl carboxylic acids with organic azides for the first time. This protocol features simple operation, broad scope and metal-free conditions, furnishing a broad spectrum of biologically attractive heterocycles. The synthetic virtue of this reaction was demonstrated by gram-scale synthesis and applicability toward drug-like molecules.

Lactamization of sp2 C–H bonds with CO2 under transition-metal-free and redox-neutral conditions: a computational mechanistic study

Bases play the primary role in Stages (I) and (III). CO₂ serves as an atomic oxidant [O] acceptor in Stage (II).

Base-catalyzed thio-lactamization of 2-(1-arylvinyl)anilines with CS2 for the synthesis of quinoline-2-thiones

Quinoline-2-thiones were prepared through a base-catalyzed thio-lactamization of 2-(1-arylvinyl)anilines with CS₂.

Base-controlled chemoselectivity reaction of vinylanilines with isothiocyanates for synthesis of quinolino-2-thione and 2-aminoquinoline derivatives

Quinolino-2-thione and 2-aminoquinoline derivatives were obtained by a base-controlled chemo-selective reaction of vinylanilines with alkyl/aryl isothiocyanates.

Ligand-enabled triple C-H activation reactions: one-pot synthesis of diverse 4-aryl-2-quinolinones from propionamides

Diverse 4-aryl-2-quinolinones are prepared from propionamides in one pot by ligand-promoted triple sequential C-H activation reactions and a stereospecific Heck reaction. In these cascade reactions, three new C-C bonds and one C-N bond are formed to rapidly build molecular complexity from propionic acid.

The cytotoxic activity of Bacillus anthracis lethal factor is inhibited by leukotriene A4 hydrolase and metallopeptidase inhibitors

The lethal factor of Bacillus anthracis is central to the pathogenesis of anthrax. Its mechanism of action is still unknown. Recently, on the basis of sequence similarities, we suggested that lethal factor might act similarly to leukotriene A4 hydrolase (LTA4), a bifunctional enzyme also endowed with a metallopeptidase activity. Here we show that some inhibitors of the LTA4 hydrolase and metallopeptidase activities of LTA4 hydrolase also affect the cytotoxicity of the anthrax lethal factor on macrophage cell lines, without interfering with the ability of the lethal factor to enter cells. These results support the proposal that anthrax lethal factor might display in the cytosol of intoxicated cells a peptidase activity similar to that of LTA4 hydrolase.