CuI complexes containing a multidentate and conformationally flexible dibenzylidene acetone ligand (dbathiophos): Application in catalytic alkene cyclopropanation
作者:Amanda G. Jarvis、Adrian C. Whitwood、Ian J. S. Fairlamb
DOI:10.1039/c0dt01612h
日期:——
showing that the ligand backbone of dbathiophos is hemilabile, and able to adopt different 1,4-dien-3-one conformational geometries around CuI. Complexes 4 and 6 both effectively catalyse the cyclopropanation of styrene with ethyl diazoacetate at low catalyst loadings (1 mol% Cu).
A Remarkable<i>cis</i>- and<i>trans</i>-Spanning Dibenzylidene Acetone Diphosphine Chelating Ligand (dbaphos)
作者:Amanda G. Jarvis、Petr E. Sehnal、Somia E. Bajwa、Adrian C. Whitwood、Xiangbiao Zhang、Man Sing Cheung、Zhenyang Lin、Ian J. S. Fairlamb
DOI:10.1002/chem.201203691
日期:2013.5.3
A multidentate and flexible diolefin–diphosphine ligand, based on the dibenzylideneacetone core, namely dbaphos (1), is reported herein. The ligand adopts an array of different geometries at Pt, Pd and Rh. At PtII the dbaphosligand forms cis‐ and trans‐diphosphine complexes and can be defined as a wide‐angle spanning ligand. 1H NMR spectroscopic analysis shows that the β‐hydrogen of one olefin moiety
Haelters, J. P.; Corbel, B.; Sturtz, G., Phosphorus and Sulfur and the Related Elements, 1988, vol. 37, p. 65 - 86
作者:Haelters, J. P.、Corbel, B.、Sturtz, G.
DOI:——
日期:——
CORBEL, B.;MEDINGER, L.;HAELTERS, J. P.;STURTZ, G., SYNTHESIS, BRD, 1985, N 11, 1048-1051
作者:CORBEL, B.、MEDINGER, L.、HAELTERS, J. P.、STURTZ, G.
DOI:——
日期:——
An Efficient Synthesis of Dialkyl 2-Oxoalkanephosphonates and Diphenyl-2-oxoalkylphosphine Oxides from 1-Chloralkyl Ketones
作者:Bernard Corbel、Luc Medinger、Jean Pierre Haelters、Georges Sturtz
DOI:10.1055/s-1985-31424
日期:——
The synthesis of dialkyl 2-oxoalkanephosphonates and diphenyl-2-oxoalkyl-phosphine oxides, via an Arbuzov reaction of trialkyl phosphites or ethoxydiphenylphosphine with methoxycarbonylhydrazono derivatives of 1-chloroalkyl ketones followed by carbonyl deprotection, is described.