92152-01-7Relevant articles and documents
PREPARATION AND USE OF BIPHENYLDICARBOXYLIC ACIDS
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Paragraph 0055; 0058, (2019/08/26)
A process for selective oxidation of at least one dimethylbiphenyl compound to the corresponding biphenyldicarboxylic acid, where the dimethylbiphenyl compound is supplied to at least one reaction zone together with an acidic solvent, an oxidizing medium, and a catalyst comprising cobalt, manganese, and bromine. The dimethylbiphenyl compound and oxidizing medium are contacted with the catalyst in the at least one reaction zone at a temperature of 150 to 210°C to oxidize the dimethylbiphenyl compound to the corresponding biphenyldicarboxylic acid. The supply of dimethylbiphenyl compound to the at least one reaction zone is then terminated, but the supply of oxidizing medium and catalyst is continued with the at least one reaction zone at a temperature of 150 to 210°C. A reaction product comprising at least 95 wt% of the biphenyldicarboxylic acid based on the total weight of oxidized dimethylbiphenyl compound is then recovered from the at least one reaction zone.
Metal-organic hendecahedra assembled from dinuclear paddlewheel nodes and mixtures of ditopic linkers with 120 and 90° bend angles
Li, Jian-Rong,Zhou, Hong-Cai
supporting information; experimental part, p. 8465 - 8468 (2009/12/26)
Don't be square: The title cages were synthesized by cooperative assembly of four-connected units and mixtures of two bridging dicarboxylate ligands (see pic-ture). This work may open a new synthetic path towards complex coordination polyhedra that are in
Transition-metal-catalyzed carbon-nitrogen and carbon-carbon bond-forming reactions
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Page/Page column 25; Sheet 3, (2008/06/13)
One aspect of the present invention relates to ligands for transition metals. A second aspect of the present invention relates to the use of catalysts comprising these ligands in various transition-metal-catalyzed carbon-heteroatom and carbon-carbon bond-forming reactions. The subject methods provide improvements in many features of the transition-metal-catalyzed reactions, including the range of suitable substrates, number of catalyst turnovers, reaction conditions, and efficiency. For example, improvements have been realized in transition metal-catalyzed: aryl amination reactions; aryl amidation reactions; Suzuki couplings; and Sonogashira couplings. In certain embodiments, the invention relates to catalysts and methods of using them that operate in aqueous solvent systems.
General catalysts for the Suzuki-Miyaura and Sonogashira coupling reactions of aryl chlorides and for the coupling of challenging substrate combinations in water
Anderson, Kevin W.,Buchwald, Stephen L.
, p. 6173 - 6177 (2007/10/03)
Amphiphilic phosphine ligands (see structures; Cy = cyclohexyl) were prepared and utilized in palladium-catalyzed Suzuki-Miyaura and Sonogashira coupling reactions in water or water/organic biphasic solvents, providing excellent yields of functionalized b
Suzuki cross-coupling reactions using reverse-phase glass beads in aqueous media
Lawson Daku, Kokovi M.,Newton, Roger F.,Pearce, Simon P.,Vile, Julia,Williams, Jonathan M. J.
, p. 5095 - 5098 (2007/10/03)
Reverse-phase glass beads have been employed in Suzuki reactions to provide, in aqueous media, a route to diverse polar substrates in good yield and with low levels of palladium leaching.
Formation of cyclopent[a]indene and acenaphthylene from allyl esters of biphenyl mono- and di-carboxylic acids and from biphenyl dicarboxylic anhydrides on flash vacuum pyrolysis at 1000-1100°C
Bapat, Jayant B.,Brown, Roger F.C.,Bulmer, Glenn H.,Childs, Trevor,Coulston, Karen J.,Eastwood, Frank W.,Taylor, Dennis K.
, p. 1159 - 1182 (2007/10/03)
Flash vacuum pyrolysis at 1000-1100°C of the allyl esters of the three isomeric biphenylcarboxylic acids, of the allyl esters of the 12 biphenyldicarboxylic acids and of the three biphenyldicarboxylic anhydrides gave pyrolysates which were examined by 1H n.m.r. spectroscopy at temperatures below -50°C. In all cases the spectra showed the presence of cyclopent[a]indene and acenaphthylene together with other products. Possible mechanisms for these ring contraction and cyclization processes are discussed and the results of pyrolyses of [2,3-13C2]biphenyl-2,3-dicarboxylic anhydride, and [3,4-13C2]-and (2-2H1)-biphenyl-3,4-dicarboxylic anhydrides are reported.
