221277-86-7Relevant academic research and scientific papers
Enantioseparation of P-Stereogenic Secondary Phosphine Oxides and Their Stereospecific Transformation to Various Tertiary Phosphine Oxides and a Thiophosphinate
Bagi, Péter,Fogassy, Elemér,Herbay, Réka,Holczbauer, Tamás,Keglevich, Gy?rgy,Nagy, Petra,Szemesi, Péter,Varga, Bence
, p. 14493 - 14507 (2021/10/25)
Secondary phosphine oxides incorporating various aryl and alkyl groups were synthesized in racemic form, and these products formed the library reported in this study. TADDOL derivatives were used to obtain the optical resolution of these P-stereogenic sec
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.
The reactivity of arylphosphorus acid amides under Birch reduction conditions
Stankevic, Marek,Wlodarczyk, Adam,Nieckarz, Damian
, p. 4351 - 4371 (2013/07/26)
Several classes of arylphosphorus acid amides have been tested in reactions with alkali metal solutions in liquid ammonia. The outcomes of such reactions depend on the structures of the starting materials. Generally, two processes-Birch reduction or cleavage of the P-aryl bond-can be operative. Diarylphosphinic amides tend to undergo double Birch reduction to afford bis(cyclohexadienyl)phosphinic amides. Copyright
Supramolecular hydrogen-bonding tautomeric sulfonamido-phosphinamides: A perfect p-chirogenic memory
Patureau, Frederic W.,Siegler, Maxime A.,Spek, Anthony L.,Sandee, Albertus J.,Juge, Sylvain,Aziz, Sarwar,Berkessel, Albrecht,Reek, Joost N. H.
experimental part, p. 496 - 503 (2012/03/11)
P-chirogenic, supramolecular hydrogen-bonding C1-symmetrical sulfonamido-phosphinamides (METAMORPhos) have been successfully prepared. They were all found to possess a characteristic prototropic equilibrium between the PIII and the P
METHODS FOR OLIGOMERIZING OLEFINS WITH CHROMIUM PYRIDINE PHOSPHINO CATALYSTS
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Page/Page column 37, (2008/12/07)
The present invention provides a method of producing oligomers of olefins, comprising reacting olefins with a catalyst under oligomerization conditions. The catalyst can be the product of the combination of a chromium compound and a pyridyl phosphino comp
Practical synthesis of chiral vinylphosphine oxides by direct nucleophilic substitution. Stereodivergent synthesis of aminophosphine ligands
Oliana, Marco,King, Frank,Horton, Peter N.,Hursthouse,Hii, King Kuok
, p. 2472 - 2479 (2007/10/03)
A practical synthesis of optically pure alkylphenylvinylphosphine oxides is described, utilizing a nucleophilic displacement at phosphorus to install the vinyl moiety. The products were used to prepare classes of P-stereogenic aminophosphine (PN) and aminohydroxyphosphine (PNO) ligands. Stereocontrol can be exerted at various stages of the synthesis, to provide specific combinations of chirality in the final product. The effect of the stereogenic phosphorus and match-mismatch of chiralities of PNO ligands were examined in the asymmetric ruthenium-catalyzed hydrogen transfer reduction of three aryl ketones.
