The Buchwald–Hartwig coupling/Michael addition sequence has been successfully applied to the synthesis of functionalized 1,2-disubstituted 4-quinolones using Pd(OAc)2 as a catalyst and PPh3 as a ligand. Under these conditions, the intermediate products first formed from chalcones and primaryamines underwent catalytic dehydrogenation to yield the 1,2-disubstituted 4-quinolones.
Transition-metal-free solid phase synthesis of 1,2-disubstituted 4-quinolones via the regiospecific synthesis of enaminones
作者:Ajjampura C. Vinayaka、Toreshettahally R. Swaroop、Prasanna Kumara Chikkade、Kanchugarakoppal S. Rangappa、Maralinganadoddi P. Sadashiva
DOI:10.1039/c5ra21421a
日期:——
Herein, the transition-metal-free economical solidphasesynthesis of 1,2-disubstituted 4-quinolones has been developed via the novel regiospecific synthesis of enaminones. Notably, a wide range of enaminones were synthesized via a silica-supported solid-phase reaction in good to excellent yields. The transformation of enaminones to 1,2-disubstituted 4-quinolones and N-methyl-2-aryl-4-quinolone alkaloid
Palladium-Catalyzed Tandem Amination Reaction for the Synthesis of 4-Quinolones
作者:Tiankun Zhao、Bin Xu
DOI:10.1021/ol902626d
日期:2010.1.15
An efficient palladium-catalyzed tandem amination approach was developed In one step to afford functionalized 4-quinolones In good to excellent yields from easily accessible o-haloaryl acetylenic ketones and primary amines.