A Superior Method for the Reduction of Secondary Phosphine Oxides
作者:Carl A. Busacca、Jon C. Lorenz、Nelu Grinberg、Nizar Haddad、Matt Hrapchak、Bachir Latli、Heewon Lee、Paul Sabila、Anjan Saha、Max Sarvestani、Sherry Shen、Richard Varsolona、Xudong Wei、Chris H. Senanayake
DOI:10.1021/ol0517832
日期:2005.9.1
to be outstanding reductants for secondaryphosphineoxides (SPOs). All classes of SPOs can be readily reduced, including diaryl, arylalkyl, and dialkyl members. Many SPOs can now be reduced at cryogenic temperatures, and conditions for preservation of reducible functional groups have been found. Even the most electron-rich and sterically hindered phosphineoxides can be reduced in a few hours at 50-70
[EN] A METHOD FOR GENERATING SECONDARY PHOSPHINES<br/>[FR] PROCEDE DE PRODUCTION DE PHOSPHINES SECONDAIRES
申请人:BOEHRINGER INGELHEIM PHARMA
公开号:WO2005068479A1
公开(公告)日:2005-07-28
This invention provides a method for generating secondary phosphines from secondary phosphine oxides in the presence of a reducing agent, such as diisobutylaluminum hydride (DIBAL-H), triisobutyldialuminoxane, triisobutylaluminum, tetraisobutyldialuminoxane, or another reducing agent comprising: (i) an R1R2AIH moiety, wherein R1 and R2 are each an alkyl species or oxygen, and wherein at least one of R1 or R2 comprises at least 2 carbon atoms, or (ii) an R1R2R3AI moiety, wherein R1, R2, and R3 are not hydrogen, and wherein at least one of R1, R2, and R3 is an alkyl species comprising a β-hydrogen, not including triethylaluminum. Preferred reducing agents for the present invention include: diisobutylaluminum hydride, triisobutyldialiuminoxane, triisobutylaluminum, tetraisobutyldialuminoxane, and combinations thereof.
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.
An efficient allylic C−H phosphorylation has been achieved through the DDQ‐promoted cross‐dehydrogenative coupling of 1,3‐diarylpropenes with P(O)H compounds at room temperature. This method provides a convenient route to allylphosphonates in up to 97% yield with good functional group compatibility.
C–H phosphorylation of thiazole derivatives with diarylphosphine oxides by a photoredox process in the absence of an external oxidant. The scope of thiazoles and phosphine oxides was further investigated, as was functional group tolerance. The general and operational simplicity provides a novel metal and oxidant-free alternative for the formation of heteroaryl-P bonds, and only molecular hydrogen is