Benzoic acids, copper complexes

Trihydroxyglutaric acid forms a 1 1 complex with chromium(iii) which has a stability constant of 0.9 x 10. In the presence of copper(n) a mixed complex is formed and dark bluish-green crystals of Na3[CuCrCioH70i4],5H20 have been isolated. The substituted benzoic acid complexes (60) have been prepared by heating a mixture of CrCL,6H20 and RCgH4C02H in Pr OH. The... 

Organometallic reagents and catalysts continue to be of considerable importance, as illustrated in several procedures CAR-BENE GENERATION BY a-ELIMINATION WITH LITHIUM 2,2,6,6-TETRAMETHYLPIPERIDIDE l-ETHOXY-2-p-TOL-YLCYCLOPROPANE CATALYTIC OSMIUM TETROXIDE OXIDATION OF OLEFINS PREPARATION OF cis-1,2-CYCLOHEXANEDIOL COPPER CATALYZED ARYLA-TION OF /3-DICARBONYL COMPOUNDS 2-(l-ACETYL-2-OXOPROPYL)BENZOIC ACID and PHOSPHINE-NICKEL COMPLEX CATALYZED CROSS-COUPLING OF GRIG-NARD REAGENTS WITH ARYL AND ALKENYL HALIDES 1,2-DIBUTYLBENZENE. 

Copper(I) complexes [Cu(L)(Tpx)] (L = 4-(diphenylphosphane) benzoic acid, Tpx = Tp, pzTp, or Tp ) have been synthesized and characterized by FT-IR in the solid state, and by NMR (3H and 31P 1H ) spectroscopy, ESI MS, and conductivity measurements in solution. The solution data are in accordance with partial dissociation of the sterically hindered complexes due to breaking of Cu-P and Cu-N... 

In these test reactions, we preformed copper(II) benzoate by treating benzoic acid with basic copper(II) carbonate, dried the resulting salt, and heated it to 150°C with 4-bromoanisole in the presence of various palladium complexes. This led to several products (Scheme 7). The formation of benzene indicated that the decarboxylation step worked, but that the intermediate arylcopper species... 

Monometallic copper complexes were also found to mediate decarboxylative couplings, but these reactions have a rather limited scope as well [60]. They are advantageous particularly for the coupling of polyfluorinated benzoic acids with aryl halides (Scheme 17). 

IR data for l,10-phenanthroline-7V,A/ -(m-nicotinato-A/,O)diaquacopper(II) nitrate show that the nicotinate bridges adjacent copper atoms through pyridine N and carboxyl O atoms.Copper(II) complexes of m- or o-[3-hydroxy-3-(/ -nitrosophenyl)-l-triazeno]benzoic acid have IR bands indicative of coordination by the O atom of the 7V-hydroxy group and the N atom of the triazene moiety. 

In addition to the examples described previously, a tremendous variety of compounds have been prepared using palladium-catalyzed cross-coupling reactions due to the broad functional group tolerance. The combination of copper and palladium complexes have been used to promote the formation of borane-protected arylphosphines [298]. Palladium acetate catalyzed the coupling of halogenated benzoic acid derivatives leading to the formation of water-soluble phosphine ligands [299]. Aryl triflates have also been used in the phosphination reaction [300]. Functionalized tyrosine derivatives were converted... 

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