An efficient one-step synthesis of 2-acylquinolines using a copper-catalyzed tandem reaction of 2-ethynylanilines with glyoxals in the presence of piperidine has been developed. This new protocol successfully avoids multi-step operation and the use of highly toxic cyanides required in traditional methods, and provides a practical tool for synthetic and pharmaceutical chemists. Various 2-acylquinolines
An enantioselective reduction of azaarene-based ketones through photoredoxasymmetriccatalysis is reported. With a transition metal-free dual catalytic system including a chiral phosphoric acid and a photosensitizer DPZ mediated by visible light, the transformations involved a tandem process involving double single-electron-transfer reductions and enantioselective protonation, providing valuable chiral
Synthesis of quinolinyl and isoquinolinyl phenyl ketones as novel agonists for the cannabinoid CB2 receptor
作者:Bastien Reux、Tapio Nevalainen、Katri H. Raitio、Ari M.P. Koskinen
DOI:10.1016/j.bmc.2009.05.013
日期:2009.7
A series of quinolinyl and isoquinolinyl phenylketones was synthesized and their CB2 receptor-dependent G-protein activities were determined using the [35S]GTPγS binding assay. Both quinoline and isoquinoline derivatives exhibited similar CB2 receptor agonist activity, the most potent ligands being the 2-(Me2N)-phenyl substituted derivatives, which were also full agonists at the CB2-receptor.
The asymmetricreduction of carbonyl compounds by means of the Ru-chiral diphosphine-chiral diamine catalysts is widely useful in organic synthesis where high levels of enantioselectivities have been attributed to multiple ligand chiral elements as well as essential stereochemical matching synergies within them. Described here is the design and discovery of new pincer-type Ru-catalysts that feature