Synthesis of chiral (phosphinoaryl)oxazolines, a versatile class of ligands for asymmetric catalysis
作者:Guido Koch、Guy C. Lloyd-Jones、Olivier Loiseleur、Andreas Pfaltz、Roger Prétôt、Silvia Schaffner、Patrick Schnider、Peter von Matt
DOI:10.1002/recl.19951140413
日期:——
Enantiomerically pure 2-[2-(diphenylphosphino)aryl]oxazolines are readily prepared from 2-bromobenzonitrile by transmetalation with BuLi, subsequent reaction with chloro-diphenylphosphine and conversion of the resulting phosphinoaryl nitrile to the oxazoline by treatment with a chiral amino alcohol in the presence of ZnCl2. An alternative synthesis is based on the orthometalation of 2-aryloxazolines
Method for the production of amines by reductive amination of carbonyl compounds under transfer-hydrogenation conditions
申请人:——
公开号:US20040267051A1
公开(公告)日:2004-12-30
The invention relates to the production of amines by the reaction of aldehydes or ketones with ammonia or primary or secondary amines in the presence of a hydrogen-donor and the presence of homogeneous metal catalysts of the eighth sub-group under mild conditions.
Perfect complementarity in the fitting of two homochiral heterodonor ligands around a nickel(II) centre: an ‘intramolecular embrace’
作者:Katharine L. Bray、Craig P. Butts、Guy C. Lloyd-Jones、Martin Murray
DOI:10.1039/a801170b
日期:——
The homochiral form of the complex [(âP,Nâ)2Ni]2+ (âP,Nâ is a phosphinoâheteroatom bidentate ligand) has been found to be more stable than its heterochiral analogue due to a âfittingâ of the two âP,Nâ ligands about the Ni that is reminiscent of an âintramolecular embraceâ.
VERFAHREN ZUR HERSTELLUNG VON AMINEN DURCH REDUKTIVE AMINIERUNG VON CARBONYLVERBINDUNGEN UNTER TRANSFER-HYDRIERUNGSBEDINGUNGEN