Bicyclic phosphine-thiazole ligands for the asymmetric hydrogenation of olefins
作者:Jia-Qi Li、Alexander Paptchikhine、Thavendran Govender、Pher G. Andersson
DOI:10.1016/j.tetasy.2010.03.023
日期:2010.6
New bicyclic thiazole-based chiral N,P-chelating ligands were developed. High activities and enantioselectivities were achieved in the iridium-catalyzed asymmetric hydrogenation of olefins with the new ligands.
Extending the Substrate Scope of Bicyclic P‐Oxazoline/Thiazole Ligands for Ir‐Catalyzed Hydrogenation of Unfunctionalized Olefins by Introducing a Biaryl Phosphoroamidite Group
作者:Maria Biosca、Alexander Paptchikhine、Oscar Pàmies、Pher G. Andersson、Montserrat Diéguez
DOI:10.1002/chem.201405361
日期:2015.2.16
This study identifies a series of Ir‐bicyclic phosphoroamidite–oxazoline/thiazole catalytic systems that can hydrogenate a wide range of minimallyfunctionalizedolefins (including E‐ and Z‐tri‐ and disubstituted substrates, vinylsilanes, enol phosphinates, tri‐ and disubstituted alkenylboronic esters, and α,β‐unsaturated enones) in high enantioselectivities (ee values up to 99 %) and conversions.