92573-07-4Relevant academic research and scientific papers
Carbohydrate monophosphine, preparation method and uses thereof
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Paragraph 0133, (2020/05/01)
The present invention provides carbohydrate monophosphine having a general formula Ia, Ib, IIa or IIb, and a preparation method thereof, wherein the carbohydrate monophosphine comprises a mixture of Ia and Ib having different phosphorus atom configurations or a mixture of IIa and IIb having different phosphorus atom configurations. The invention relates to a borane adduct, an oxide, a sulfide or aselenide of the carbohydrate monophosphine. The invention also provides a carbohydrate monophosphine coordinated palladium complex, and uses of a catalytic system consisting of the carbohydrate monophosphine and a palladium salt or a complex, or the carbohydrate monophosphine coordinated palladium complex in catalysis of organic reactions, particular in catalysis of coupling reactions for formingC-C, or C-N bonds by using (pseudo) aryl halides.
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.
OLIGOMERISATION OF ETHYLENE TO MIXTURES OF 1-HEXENE AND 1-OCTENE
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Page/Page column 32-33, (2014/12/09)
A process for the otigomerisation of ethylene to predominantly 1-hexene or 1-octene or mixtures of 1-hexene and 1-octene includes contacting ethylene with a catalyst under ethylene oligomerisation conditions. The catalyst comprises a source of chromium, a diphosphine ligating compound, and optionally an activator. The diphosphine ligating compound includes at least one optionally substituted fused cyclic structure including at least two rings, the optionally substituted fused cyclic structure including a 5- to 7- membered aromatic first ring bonded to a phosphorus atom, the aromatic first ring being fused to a 4- to 8-membered heterocyclic second ring, the heterocyclic second ring including a heteroatom which is separated by two ring atoms along the shortest connecting path from the phosphorous atom that is bonded to the first aromatic ring.
OLIGOMERISATION OF ETHYLENE TO MIXTURES OF 1-HEXENE AND 1-OCTENE
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Page/Page column 32-33, (2014/12/09)
A process for the oligomerisation, preferably the tetramerisation, of ethylene to predominantly 1- hexene or 1-octene or mixtures of 1-hexene and 1-octene includes contacting ethylene with a catalyst under ethylene oiigomerisation conditions. The catalyst
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
PROCESSES FOR THE STEREOSELECTIVE PREPARATION OF P-CHIRAL FOUR -COORDINATED PHOSPHORUS BORANE COMPOUNDS AND P-CHIRAL THREE-COORDINATED PHOSPHORUS COMPOUNDS
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Page/Page column 74-75, (2012/09/11)
Processes for the stereoselective preparation of P-chiral four-coordinated phosphorus borane compounds and P-chiral three-coordinated phosphorus compounds.
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.
, 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 38, (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
CATALYTIC OLIGOMERIZATION OF OLEFINIC MONOMERS
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Page/Page column 11-12, (2008/06/13)
A catalyst precursor composition comprising: a) a source of chromium, molybdenum or tungsten; b) a first ligand having the general formula (I); [in-line-formulae](R1)(R2)P—X—P(R3)(R4)??(I) [/in-line-formulae] wherein: X is a bridging group of the formula —N(R5)—, wherein R5 is selected from hydrogen, a hydrocarbyl group, a substituted hydrocarbyl group, a heterohydrocarbyl group, a substituted heterohydrocarbyl group, a silyl group or derivative thereof; at least three of R1 to R4 are independently selected from optionally substituted aromatic groups, each bearing a polar substituent on at least one of the ortho-positions; and optionally one of R1 to R4 is independently selected from hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl and substituted heterohydrocarbyl groups with the proviso that when the group is aromatic it does not contain a polar substituent at any of the ortho-positions; c) a second ligand having the general formula (II); [in-line-formulae](R1′)(R2′)P—X′—P(R3′)(R4′)??(II) [/in-line-formulae] wherein: X′ is a bridging group as defined for X of the first ligand, component (b), of general formula (I); at least R1′ and R2′ of R1′ to R4′ are independently selected from hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl and substituted heterohydrocarbyl groups with the proviso that when the group is aromatic it does not contain a polar substituent at any of the ortho-positions; and optionally none, one or both of R3′ and R4′ are independently selected from an optionally substituted aromatic group bearing a polar substituent on at least one of the ortho-positions. The present invention also relates to a catalyst system comprising the catalyst precursor composition of the present invention and additional component; d) a cocatalyst. The present invention further relates to a process for the trimerization and tetramerization of olefinic monomers, particularly the trimerization and tetramerization of ethylene to 1-hexene and 1-octene, wherein the process comprises contacting at least one olefinic monomer with the catalyst system of the present invention.
P-chiral phosphinoselenoic chlorides and phosphinochalcogenoselenoic acid esters: Synthesis, characterisation, and conformational studies
Kimura, Tsutomu,Murai, Toshiaki
, p. 952 - 959 (2007/10/03)
(Chemical Equation Presented) P-Chiral alkyl or aryl phenylphosphinoselenoic chlorides were obtained by reacting PhPCl2 with Grignard reagents and elemental selenium. P-Chiral dialkyl chlorides were also obtained by treating PCl3 with two different Grignard reagents and elemental selenium. The structure of the chloride was determined by X-ray molecular structure analysis. P-Chiral phosphinochalcogenoselenoic acid esters bearing a P=Se double bond were synthesized by treating the chlorides with alkali metal alkoxide and chalcogenolates, whereas those bearing a P-Se single bond were obtained by sequential treatment of the chlorides with sodium hydroxide, sulfide or selenide, and alkyl iodides. X-ray molecular structure analyses of esters showed that they adopted gauche conformations. The computational results supported the observed conformational preference. Natural bond orbital analyses of the model compounds showed that two types of nonbonding orbital interactions, nE′ → σ*P=E and nE → σ*P-E′, are important in these compounds. Linear correlations were observed between the experimental 77Se NMR chemical shifts or the coupling constants of P-Se bonds in the esters and the calculated P-Se bond lengths of the model compounds.
