Enantioselective hydrophosphinylation of 1-alkenylphosphine oxides catalyzed by chiral strong Brønsted base
作者:Azusa Kondoh、Sho Ishikawa、Masahiro Terada
DOI:10.1039/d0ob01778g
日期:——
A catalytic enantioselective addition of diarylphosphine oxides to 1-alkenyl(diaryl)phosphine oxides was achieved by using a chiral ureate as a chiral strong Brønsted base catalyst. The reaction followed by the reduction of phosphine oxide moieties provided chiral 1,2-diphosphinoalkanes, which are a family of useful chiral ligands for asymmetric transition metalcatalysis.
Synthesis and application of chiral bisphosphines through lithiation–conjugate addition tandem cyclization of chiral α,β,ψ,ω-unsaturated bisphosphine oxide
Upon treatment with lithium diisopropylamide achiral and chiral α,β,Ï,Ï-unsaturated bisphosphine oxides underwent lithiationâconjugate addition tandem cyclization to afford the corresponding endo-α,β-unsaturated cyclic bisphosphine oxides; sequential stereoselective reduction of the cyclized bisphosphine oxide gave the corresponding trans- and cis-bisphosphines that were successfully applicable in a catalytic asymmetric hydrogenation as chiral bisphosphine ligands.
Synthese stereoselective d'esters α,β- ethyleniques α-methyles Z ou E par la reaction de wittig-horner a partir de phosphonates ou d'oxydes de phosphine
作者:Guita Etemad-Moghadam、Jacqueline Seyden-Penne
DOI:10.1016/s0040-4020(01)91264-5
日期:1984.1
Alkylidènediphosphonates et vinylphosphonates: une démarche synthétiques sélective par voie carbanionique