Asymmetric Cleavage of Racemic 1,3-Oxazolidines – A New Dynamic Process in Homogeneous Rh(I)-Catalyzed Hydrogenation
作者:Vitali I. Tararov、Renat Kadyrov、Axel Monsees、Thomas H. Riermeier、Armin Börner
DOI:10.1002/adsc.200390018
日期:2003.1
The mechanism of the homogeneously catalyzed hydrogenation of 1,3-oxazolidines with a Rh(I) diphosphane catalyst affording tertiary hydroxyethyl-substituted amines was investigated with the help of D2 labelling experiments. It was found that the reaction proceeds via prochiral intermediates with, preferentially, an iminium cation being in equilibrium with the 1,3-oxazolidine. This observation opened