A range of alkyl phenylphosphonites are prepared from the reaction of phenylphosphinic acid with the corresponding alkyl chloroformates. A mechanism for this reaction is proposed. 2003 Elsevier Science Ltd. All rights reserved.
Room Temperature, Palladium-Mediated <i>P</i>–Arylation of Secondary Phosphine Oxides
作者:Aaron J. Bloomfield、Seth B. Herzon
DOI:10.1021/ol301831k
日期:2012.9.7
iodides are efficiently coupled with secondary phosphine oxides using 1 mol % of a catalyst formed in situ from tris(dibenzylideneacetone)dipalladium and Xantphos (1). Scalemic (S)-methylphenylphosphine oxide [(S)-2e] is shown to undergo arylation without detectable stereoerosion. The application of this method to the synthesis of novel P-chiralphosphines and PCP ligands is demonstrated.
PROCESS FOR PRODUCTION OF OPTICALLY ACTIVE PHOSPHOROUS COMPOUND
申请人:Han Li-Biao
公开号:US20100174079A1
公开(公告)日:2010-07-08
Disclosed is a process for producing an optically active phosphorus compound having an R- or S-type absolute configuration on phosphorus in a simple manner and at high efficiency, while avoiding racemization.
An optically active phosphorus compound having an R- or S-type absolute configuration on phosphorus represented by the general formula (III) can be produced by reacting an optically active phosphorus compound having an R- or S-type absolute configuration on phosphorus represented by the general formula (I) with a metal compound represented by the general formula (II) and water. (I) wherein R
1
represents a hydrogen atom, analkyl group, a cycloalkyl group, an aralkyl group or an aryl group; and R
2
represents a hydrogen, an alkyl group, a cycloalkyl group, an aryl group, an aralkyl group, alkenyl group, an alkoxy group, an aryloxy group, a heterocyclic ring residue or a silyl-containing group. R
3
M (II) wherein R
3
is the same as R
2
; and M represents a lithium or magnesium halide MgX (X═Cl, Br or I). (III) wherein R
2
and R
3
are as defined above.
Retention of Configuration on the Oxidative Addition of P−H Bond to Platinum (0) Complexes: The First Straightforward Synthesis of Enantiomerically Pure P-Chiral Alkenylphosphinates via Palladium-Catalyzed Stereospecific Hydrophosphinylation of Alkynes
The oxidativeaddition of pure (R(P))-menthyl phenylphosphinate 1 to a platinum (0) complex proceeds readily with retention of configuration at the chiral phosphorus center which was unambiguously confirmed by an X-ray analysis. In the presence of a catalytic amount of palladium, the hydrophosphinylation of a variety of alkynes with 1 also takes place stereospecifically, with retention of configuration
Copper-Catalyzed Oxidative Cross-Coupling of H-Phosphine Oxides with Alkenes in the Synthesis of Alkenylphosphine Oxides
作者:Shang-Dong Yang、Liu-Liang Mao、An-Xi Zhou、Na Liu
DOI:10.1055/s-0034-1379545
日期:——
The first copper-catalyzed alkene oxidative cross-coupling reaction with various R2P(O)H compounds has been reported, affording a novel and efficient method for the synthesis of valuable alkenylphosphine oxides compounds with broad substrate applicability and succinct reaction system with immoderate to good yields.