An oxidative kinetic resolution of racemic acyclic amines was developed using an imine derivative as the resolving reagent and chiral phosphoric acid as the catalyst to give enantiomers in good yields with high to excellent enantioselectivities. The key to success of the title reaction was the equilibrium control by adjusting the ratio of the resolving reagent, and unique enantiodivergence was observed
aromatic ketimines into amines by using a novel catalyst based on a metallacarborane structure, 8,8′-μ-phosphate[(1,2-dicarba- closo -undecaborane)-3,3′-cobalt(-1)(1′,2′-dicarba- closo -undecaborane)] acid, is described.
Copper Acetoacetonate [Cu(acac)<sub>2</sub>]/BINAP-Promoted C<i>sp</i><sup>3</sup>N Bond Formation<i>via</i>Reductive Coupling of<i>N</i>-Tosylhydrazones with Anilines
AbstractWe report the the copper(II) acetoacetonate [Cu(acac)2]/BINAP‐catalyzed synthesis of arylamines from N‐tosylhydrazones and anilines. A fine tuning of the reaction conditions was required to accomplish the cross‐coupling successfully, including the ligands effect and the addition of small amounts of water. The characteristic feature of this protocol is its functional group compatibility and its chemoselectivity when various aminophenol derivatives were used. Taking into consideration the interest for this copper‐reductive coupling in which no stoichiometric metal hydride reagent is employed, this can be considered as an alternative to the conventional reductive amination.magnified image
Mrsic, Natasa; Minnaard, Adriaan J.; Feringa, Ben L., Journal of the American Chemical Society, 2009, vol. 131, p. 8358 - 8359
作者:Mrsic, Natasa、Minnaard, Adriaan J.、Feringa, Ben L.、Vries, Johannes G. de