Zirconium complexes supported by multidentate aminophenolato ligands were synthesized and characterized. The catalytic activities of neutral zirconium complexes and their cationic derivatives in the hydrophosphination of alkenes as well as heterocumulenes have been investigated and compared. Neutralcomplex 1 bearing a multidentate amino mono(phenolato) ligand exhibited high activity in hydrophosphination
Hydrophosphination using [GeCl{N(SiMe<sub>3</sub>)<sub>2</sub>}<sub>3</sub>] as a pre-catalyst
作者:A. N. Barrett、H. J. Sanderson、M. F. Mahon、R. L. Webster
DOI:10.1039/d0cc05792d
日期:——
The hydrophosphination of activated alkenes and internal alkynes is reported using a remarkably simple Ge(iv) pre-catalyst. Preliminary mechanistic investigations indicate that the reaction proceeds via a redox neutral catalytic cycle.
Copper(I)-catalyzed hydrophosphination of styrenes
作者:Antonio Leyva-Pérez、Jose A. Vidal-Moya、Jose R. Cabrero-Antonino、Salem S. Al-Deyab、Saud I. Al-Resayes、Avelino Corma
DOI:10.1016/j.jorganchem.2010.09.069
日期:2011.1
Hydrophosphination of styrenes has been accomplished with metal salts for the first time. (CuOTf)(2).toluene complex is the catalyst of choice, but CuCl can also be used. "In-situ" EPR and NMR studies suggest Cu(I) as the catalytically active metal species, giving exclusively the anti-Markovnikov product. Phosphine oxides or beta-ketophosphine oxides can be prepared in one-pot by oxidation with molecular oxygen. (C) 2010 Elsevier B.V. All rights reserved.
Catalytic Cleavage of Unactivated C(aryl)–P Bonds by Chromium
We describe here the coupling to transform aryl phosphine derivatives by the cleavage of unactivated C(aryl)–P bonds with chromium catalysis, allowing us to achieve the reaction with alkyl bromides and arylmagnesium reagentsundermildconditions. Mechanistic studies indicate that catalytic cleavage of unactivated C(aryl)–P bonds is due to the in situ formed reactive Cr, followed by transmetalation