Rapid Metal-Free Formation of Free Phosphines from Phosphine Oxides
作者:Cei B. Provis-Evans、Emma A. C. Emanuelsson、Ruth L. Webster
DOI:10.1002/adsc.201800723
日期:2018.10.18
A rapid method for the reduction of secondary phosphineoxides under mild conditions has been developed, allowing simple isolation of the corresponding free phosphines. The methodology involves the use of pinacol borane (HBpin) to effect the reduction while circumventing the formation of a phosphine borane adduct, as is usually the case with various other commonly used borane reducing agents such as
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
Facile, Catalytic Dehydrocoupling of Phosphines Using β‐Diketiminate Iron(II) Complexes
作者:Andrew K. King、Antoine Buchard、Mary F. Mahon、Ruth L. Webster
DOI:10.1002/chem.201503399
日期:2015.11.2
Catalytic dehydrocoupling of primary and secondary phosphines has been achieved for the first time using an iron pre‐catalyst. The reaction proceeds under mild reaction conditions and is successful with a range of diarylphosphines. A proton acceptor is not needed for the transformation to take place, but addition of 1‐hexene does allow for turnover at 50 °C. The catalytic system developed also facilitates
N-(PHOSPHINOALKYL)-N-(THIOALKYL)AMINE DERIVATIVE, METHOD FOR PRODUCING SAME, AND METAL COMPLEX THEREOF
申请人:TAKASAGO INTERNATIONAL CORPORATION
公开号:US20170233418A1
公开(公告)日:2017-08-17
The purpose of the present invention is to provide: a ligand that is useful in a catalytic organic synthetic reaction; a method for producing said ligand; and a metal complex that is useful as a catalyst in an organic synthetic reaction. The present invention provides a compound represented by general formula (1
A
), a method for producing said compound, and a metal complex including said compound as a ligand. (In the formula, H, N, P, S, L, R
1
, R
2
, R
3
, Q
1
, and Q
2
have the meaning as defined in the Description.)
Enantioselective Palladium‐Catalyzed Hydrophosphinylation of Allenes with Phosphine Oxides: Access to Chiral Allylic Phosphine Oxides
作者:Zhiping Yang、Jun (Joelle) Wang
DOI:10.1002/anie.202112285
日期:2021.12.20
A highly efficient, versatile and atom-economic protocol to chiral allylic phosphineoxides is demonstrated via palladium-catalyzed asymmetric hydrophosphinylation of allenes with phosphineoxides. A family of chiral allylic phosphineoxides with a diverse range of functional groups were obtained in high yield (up to 99 %) and enantioselectivities (up to 99 % ee).