Enantioselective Boronate Additions to N-Acyl Quinoliniums Catalyzed by Tartaric Acid
摘要:
Tartaric acid catalyzes the asymmetric addition of vinylboronates to N-acyl quinoliniums, affording highly enantioenriched dihydroquinolines. The catalyst serves to activate the boronate through a ligand-exchange reaction and generates the N-acyl quinolinium in situ from the stable quinoline-derived N,O-acetal.
Dual metal and Lewis base catalysis approach for asymmetric synthesis of dihydroquinolines and the α-arylation of aldehydes <i>via N</i>-acyliminium ions
作者:Chandra M. R. Volla、Eleonora Fava、Iuliana Atodiresei、Magnus Rueping
DOI:10.1039/c5cc05209b
日期:——
A dual catalytic system consisting of indium triflate and a chiral imidazolidinone catalyzes the asymmetric addition of aldehydes to N-acyl quinoliniums furnishing optically active dihydroquinolines in good yields and excellent selectivities.