Iridium-Catalyzed Asymmetric Hydrogenation Yielding Chiral Diarylmethines with Weakly Coordinating or Noncoordinating Substituents
作者:Päivi Tolstoy、Mattias Engman、Alexander Paptchikhine、Jonas Bergquist、Tamara L. Church、Abby W.-M. Leung、Pher G. Andersson
DOI:10.1021/ja9013375
日期:2009.7.1
in pharmaceuticals and natural products, making the synthetic methods that form these chiral centers are important in industry. We have applied iridium complexes with novel N,P-chelating ligands to the asymmetric hydrogenation of trisubstituted olefins, forming diarylmethine chiral centers in high conversions and excellent enantioselectivities (up to 99% ee) for a broad range of substrates. Our results