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.
with moderate diastereoselectivities. An efficient method for the C-4-selective addition of quinoline derivatives to carbonylcompounds is described. The combination of 2-ethoxy-1-ethoxycarbonyl-1,2-dihydroquinolines (EEDQs) with a palladium catalyst and diethylzinc generates nucleophilic allyl species which undergo addition to various aldehydes and ketones. C-4-Substituted quinoline derivatives are obtained
Enantioselective Boronate Additions to <i>N</i>-Acyl Quinoliniums Catalyzed by Tartaric Acid
作者:Tomohiro Kodama、Philip N. Moquist、Scott E. Schaus
DOI:10.1021/ol2028702
日期:2011.12.2
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.