Use of tridentate TsDPEN/pyridine ligands in ruthenium-catalysed asymmetric reduction of ketones
摘要:
A series of enantiomerically pure tridentate ligands based on the 1,2-diphenylethane-1,2-diamine structure, containing additional pyridine groups, was prepared and tested in asymmetric transfer hydrogenation of ketones using Ru-3(CO)(12) as a metal source. Alcohols were formed in up to 93% ee in the best cases, and good results were obtained with ortho-haloarylketones. (C) 2013 Elsevier Ltd. All rights reserved.
Use of tridentate TsDPEN/pyridine ligands in ruthenium-catalysed asymmetric reduction of ketones
摘要:
A series of enantiomerically pure tridentate ligands based on the 1,2-diphenylethane-1,2-diamine structure, containing additional pyridine groups, was prepared and tested in asymmetric transfer hydrogenation of ketones using Ru-3(CO)(12) as a metal source. Alcohols were formed in up to 93% ee in the best cases, and good results were obtained with ortho-haloarylketones. (C) 2013 Elsevier Ltd. All rights reserved.
Synthesis of Tridentate Ligands Based on Chiral Diamines and Their Application to Enantioselective Friedel-Crafts Alkylation of Indoles with Nitroalkenes
作者:Mei Wu、Shoufeng Wang、Chungu Xia、Wei Sun
DOI:10.1002/cjoc.201090243
日期:——
A new type of chiral tridentate ligands were prepared and their Zn complexes were examined for the asymmetric Friedel‐Craftsalkylation of indoles with nitroalkenes, which gave rise to good yields and moderate enantioselectivities.