41924-67-8Relevant academic research and scientific papers
Polyhedral oligomeric silsesquioxane-conjugated bis(diphenylphosphino)amine ligand for chromium(III) catalyzed ethylene trimerization and tetramerization
Lee, Hoseong,Hong, Soon Hyeok
, p. 21 - 27 (2018/05/07)
Polyhedral oligomeric silsesquioxanes (POSSs) were attached to conventional bis(diphenylphosphino)amine (PNP) ligand as solubility-enhancing materials for catalytic ethylene trimerization and tetramerization. Differently functionalized arylphosphine ligands of the type (Ph)2PN(POSS)P(Ph)(ArR) (R = functional groups) were systematically developed, and their corresponding chromium(III) complexes were formed. The developed precatalysts exhibited excellent tolerance in solvents, including even low-carbon-number hydrocarbons such as n-pentane, n-hexane, or cyclohexane. In particular, the ortho-fluorophenyl-substituted complex showed higher stability even at higher temperatures above 120 °C. The ortho-OCF3-phenyl-substituted complex showed outstanding catalytic activity, which reached 2287 kg/g Cr/h at 30 bar.
Turning regioselectivity into stereoselectivity: Efficient dual resolution of P-stereogenic phosphine oxides through bifurcation of the reaction pathway of a common intermediate
Nikitin, Kirill,Rajendran, Kamalraj V.,Mueller-Bunz, Helge,Gilheany, Declan G.
supporting information, p. 1906 - 1909 (2014/03/21)
Synthetic routes that provide facile access to either enantiomeric form of a target compound are particularly valuable. The crystallization-free dual resolution of phosphine oxides that gives highly enantioenriched materials (up to 94 % ee) in excellent y
Cleavage of P=O in the presence of P-N: Aminophosphine oxide reduction with in situ boronation of the PIII product
Kenny, Niall P.,Rajendran, Kamalraj V.,Jennings, Elizabeth V.,Gilheany, Declan G.
supporting information, p. 14210 - 14214 (2013/11/06)
In contrast to tertiary phos-phine oxides, the deoxygenation of aminophosphine oxides is effectively impossible due to the need to break the immensely strong and inert P=O bond in the presence of a relatively weak and more reactive P-N bond. This long-sta
Simple unprecedented conversion of phosphine oxides and sulfides to phosphine boranes using sodium borohydride
Rajendran, Kamalraj V.,Gilheany, Declan G.
supporting information; experimental part, p. 817 - 819 (2012/02/03)
A variety of phosphine oxides and sulfides can be efficiently converted directly to the corresponding phosphine boranes using oxalyl chloride followed by sodium borohydride. Optically active P-stereogenic phosphine oxides can be converted stereospecifically to phosphine boranes with inversion of configuration by treatment with Meerwein's salt followed by sodium borohydride.
P-stereogenic phosphorus compounds: Effect of aryl substituents on the oxidation of arylmethylphenylphosphanes under asymmetric appel conditions
Rajendran, Kamalraj V.,Kennedy, Lorna,Gilheany, Declan G.
experimental part, p. 5642 - 5649 (2010/12/25)
The effects of aryl ring substitution on the dynamic resolution of aryl(methyl)phenylphosphanes under asymmetric Appel reaction conditions have been studied. As expected, substitution at the ortho position strongly affects the degree ofstereoselection tha
SYNTHESE DIRECTE DE PHOSPHINES TERTIARIES RACEMIQUES ET DE CHLOROPHOSPHINES DISSYMETRIQUES
Chodkiewicz, W.,Guillerm, D.,Jore, D.,Mathieu, E.,Wodzki, W.
, p. 107 - 114 (2007/10/02)
Racemic tertiary phosphines are obtained from dichlorophenylphosphine by a "one pot" synthesis in two steps: (1) condensation of one equivalent of an organocadmium, and (2) substitution of the second chlorine by another organometallic compound.The phosphines liberated from the resulting complexes can be stabilised by direct complexation with cuprous salts.The monochlorophosphines can be isolated in the first stage when their cadmium complexes are submitted to ligand exchange with pyridine.
