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Water-soluble cis-[(NHC)PdBr 2(TPPTS)] catalysts and their applications in Suzuki–Miyaura coupling of aryl chlorides

Water-soluble cis-[(NHC)PdBr 2(TPPTS)] catalysts and their applications in Suzuki–Miyaura coupling of aryl chlorides,10.1016/j.molcata.2011.08.008,Jou

Water-soluble cis-[(NHC)PdBr 2(TPPTS)] catalysts and their applications in Suzuki–Miyaura coupling of aryl chlorides  
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New palladium(II) complexes (2), bearing NHC/TPPTS ligands, (NHC=benzimidazol-2-ylidene; TPPTS=triphenylphosphine-3,3′,3″-trisulfonic acid trisodium salt) have been prepared and characterized by elemental analyses and spectroscopic methods. Their ability to catalyze the Suzuki–Miyaura reaction in neat water has been studied at 100°C. Very high activities have been observed in the coupling of phenylboronic acid with aryl chlorides in the presence of 1% of the catalyst. We have compared the electronic properties of cis-[PdBr2(NHC)(TPPTS)] with the related complexes, [PdX2(NHC)]2 and [trans-PdBr2(NHC)(pdca)] (pdca=pyridine-2,6-dicarboxyic acid) (3) via three different techniques: cyclic voltammetry, thermogravimetric analysis and 13C NMR spectroscopy.
Journal: Journal of Molecular Catalysis A-chemical - J MOL CATAL A-CHEM , vol. 348, no. 1, pp. 88-93, 2011
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