219794-79-3Relevant academic research and scientific papers
New P,N ligands with chiral nitrogen center: Applications in homogeneous catalysis
Saluzzo, Christine,Breuzard, Jérémy,Pellet-Rostaing, Stéphane,Vallet, Martial,Le Guyader, Frédéric,Lemaire, Marc
, p. 98 - 104 (2002)
In order to perform homogeneous asymmetric hydroformylation, hydrosilylation and Grignard cross-coupling reaction, we have developed a new family of P,N ligands derived from quincorine and quincoridine.
Grignard cross-coupling catalyzed by chiral phosphino-quincorine and phosphino-quincoridine derivatives
Pellet-Rostaing, Stephane,Saluzzo, Christine,Ter Halle, Rob,Breuzard, Jeremy,Vial, Laurent,Le Guyader, Frederic,Lemaire, Marc
, p. 1983 - 1985 (2001)
New β-aminoalkylphosphines with a stereogenic nitrogen center have been synthesized from quincorine and quincoridine. Nickel catalysts were studied for their enantioselectivity in the asymmetric Kumada-Corriu reaction. The (2S,4S,5R)-2-diphenylphosphinomethyl-5-ethyl-quinuclidine-nickel complex led to e.e. of 85% for the cross-coupling of l-phenylethyl-magnesium chloride with vinyl bromide.
Cinchona alkaloid derived ligands in catalytic asymmetric transfer hydrogenation
Hartikka, Antti,Modin, Stefan A.,Andersson, Pher G.,Arvidsson, Per I.
, p. 2522 - 2526 (2007/10/03)
A collection of chiral quinuclidine ligands, derived from the Cinchona alkaloids quinine and quinidine, has been evaluated in the catalytic asymmetric transfer hydrogenation of aromatic ketones. It was fond that [IrCl(COD)] 2 complexes of the d
Synthesis of 10,11-didehydro- and 10,11-dihydro-quincorine and of the quincoridine analogs: Functionalized and enantiopure 1-azabicyclo[2.2.2]- octanes with four stereogenic centers
Schrake, Olaf,Braje, Wilfried,Hoffmann,Wartchow
, p. 3717 - 3722 (2007/10/03)
The convenient synthesis of 10,11-didehydro-QCI (2) and of 10,11- didehydro-QCD (4) as well as 10,11-dihydro-QCI (5) and 10,11-dihydro-QCD (6) is described. Conversion of the olefinic double bond of Quincorine 1 and Quincoridine 3 into the corresponding alkynes 2 and 4 involves twofold dehydrobromination, and an important application of the solid KOH/aliquat 336 system in the key step. The structure of didehydro-QCI (2) has been elucidated by X-ray crystal diffraction. The new alkynes 2 and 4 are more polar and more basic than QCI and QCD, respectively.
