850308-65-5Relevant articles and documents
Synthesis and characterisation of novel o-xylene-based P,E ligands
Allan, Kathryn M.,Spencer, John L.
, p. 956 - 964 (2014/02/14)
A range of novel hybrid ligands of the type, o-C6H 4(CH2PBut2)(CH2E) (E = P(C6F5)2, SBut, SPh, S(O)Bu t, NR2, SiPh2H), have been synthesised in two or three steps from the common substrate, o-C6H4{CH 2PBut2(BH3)}(CH2Cl). The initial step involved treatment of the substrate with the appropriate nucleophilic reagent, or preparation of a Grignard reagent from o-C 6H4{CH2PBut2(BH 3)}(CH2Cl) and reaction with the appropriate electrophile. In most cases, this versatile strategy produced air-stable crystalline ligand precursors. Phosphine deprotection was achieved via one of three methods, dependent upon the properties of the second functional group. An alternative synthesis of the known ligand, o-C6H4(CH 2PBut2)(CH2PPh2), is also presented.
PROCESS FOR THE CARBONYLATION OF ETHYLENICALLY UNSATURATED COMPOUNDS, NOVEL CARBONYLATION LIGANDS AND CATALYST SYSTEMS INCORPORATING SUCH LIGANDS
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Page/Page column 50-51; 54-55, (2010/04/03)
A novel bidentate catalytic ligand of general formula (I) is described. R represents a hydrocarbyl aromatic structure having at least one aromatic ring to which Q 1 and Q 2 are each linked, via the respective linking group, if present, on available adjacent atoms of the at least one aromatic ring. The groups X 3 and X 4 represent radicals joined via tertiary carbon atoms to the respective atom Q 1 and the groups X 1 and X 2 represent radicals joined via primary, or substituted aromatic ring carbon atom(s) to the respective atom Q 2. A and B represent an optional lower alkylene linking group. Q 1 and Q 2 each represent phosphorus, arsenic or antimony. A process for the carbonylation of ethylenically unsaturated compounds comprising reacting the compound with carbon monoxide in the presence of a source of hydroxyl groups, optionally, a source of anions and catalyst system obtainable by combining a metal of Group 8, 9 or 10 or a compound thereof and the bidentate ligand of general formula (I) is also described.
