Catalytic atroposelective dynamic kinetic resolutions and kinetic resolutions towards 3-arylquinolinesviaS_NAr

Herein we report the catalytic atroposelective syntheses of pharmaceutically relevant 3-arylquinolinesviathe nucleophilic aromatic substitution (S_NAr) of thiophenols into 3-aryl-2-fluoroquinolines mediated by catalytic amounts of Cinchona alkaloid-derived ureas. These reactions displayed a spectrum of dynamic kinetic resolution (DKR) and kinetic resolution (KR) characters depending upon the stereochemical stability of the starting material. Low barrier substrates proceededviaDKR while higher barrier substrates proceededviaKR. On the other hand, substrates with intermediate stabilities displayed hallmarks of both DKR and KR. Finally, we also show that we can functionalize the atropisomerically enriched quinolines into pharmaceutically privileged scaffolds with minimal observed racemization.