Phosphinyl Guanidine Compounds, Metal Salt Complexes, Catalyst Systems, and Their Use to Oligomerize or Polymerize Olefins
申请人:SYDORA Orson J.
公开号:US20130331629A1
公开(公告)日:2013-12-12
The present application relates to N
2
-phosphinyl guanidine metal salt complexes. The present application also relates to catalyst systems comprising N
2
-phosphinyl guanidine metal salt complexes and processes for making catalyst systems comprising N
2
-phosphinyl guanidine metal salt complexes. The present application also relates to utilizing N
2
-phosphinyl guanidine metal salt complexes in processes of oligomerizing or polymerizing olefins.
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.
Stereospecific Nucleophilic Substitution of Optically Pure <i>H</i>-Phosphinates: A General Way for the Preparation of Chiral P-Stereogenic Phosphine Oxides
作者:Qing Xu、Chang-Qiu Zhao、Li-Biao Han
DOI:10.1021/ja804412k
日期:2008.9.24
configurations at phosphorus to give a wide range of P-stereogenic secondary phosphineoxides and tertiary phosphineoxides, by quenching the reaction mixture with water and alkyl halides, respectively. This finding establishes a general protocol for the preparation of optically active secondary phosphineoxides and tertiary phosphineoxides from the easily accessible optically pure H-phosphinates. Mechanistic
Transition metal-free and regioselective vinylation of phosphine oxides and <i>H</i>-phosphinates with VBX reagents
作者:Laura Castoldi、Adam A. Rajkiewicz、Berit Olofsson
DOI:10.1039/d0cc05992g
日期:——
Vinylbenziodoxolones (VBX) were demonstrated as efficient, metal-free P-vinylation reagents with complete regioselectivity in favor of the terminal alkenes.
the synthesis of alkynylphosphine oxides based on the oxidative alkynylation of secondary phosphineoxides with copper acetylides was developed. Activation with molecular oxygen in the presence of either a mixture of 1,2-dimethylimidazole and triethylamine or N-methylimidazole alone enabled the formal umpolung of the poorly nucleophilic copper acetylides, which were coupled with phosphineoxides under