Fesulphos-Palladium(II) Complexes as Well-Defined Catalysts for Enantioselective Ring Opening of Meso Heterobicyclic Alkenes with Organozinc Reagents
作者:Silvia Cabrera、Ramón Gómez Arrayás、Inés Alonso、Juan C. Carretero
DOI:10.1021/ja055692b
日期:2005.12.1
The air-stable and readily available cationic methyl palladium(II) complexes of planarchiral Fesulphos ligands [(Fesulphos)Pd(Me)(PhCN)]+ X- are highlyefficientcatalysts for the alkylative ringopening of oxa- and azabicyclicalkenes with dialkylzinc reagents, showing broad scope with regards to both the bicyclic substrate and the dialkylzinc reagent. Catalyst loading as low as 0.5 mol % is sufficient
A multinuclear palladium catalyst can be used to realize the efficient catalytic asymmetric alkylative ring-opening reaction of oxabicyclic alkenes using dimethylzinc. The use of (R)-BINOL-PHOS bearing bisphosphine and diol moieties is essential for achieving excellent catalytic performance; the corresponding monophosphine and hydroxy-protected derivatives showed lower catalytic activities and/or enantioselectivities. The generation of Pd/Zn-multinuclear complexes is a key feature of the present catalysis.
Cationic Planar Chiral Palladium P,S Complexes as Highly Efficient Catalysts in the Enantioselective Ring Opening of Oxa- and Azabicyclic Alkenes
作者:Silvia Cabrera、Ramón Gómez Arrayás、Juan C. Carretero
DOI:10.1002/anie.200460087
日期:2004.7.26
Palladium-Catalyzed Enantioselective Alkylative Ring Opening
作者:Mark Lautens、Jean-Luc Renaud、Sheldon Hiebert
DOI:10.1021/ja993427i
日期:2000.3.1
Transition Metal Complexes of Fesulphos Ligands in Enantioselective Catalytic Transformations
作者:Juan Carlos Carretero、Ramón Gómez Arrayás、Olga García Mancheño、Silvia Cabrera