Bis(imino)pyridine palladium(II) complexes: Synthesis, structure and catalytic activity

Amino-salicylaldimine–palladium(II) complexes: New and efficient catalysts for Suzuki and Heck reactions

“…The Pd1-O1 (1.969 Å) bond length is slightly shorter than that found in the related bis(phenoxyketimine) palladium complex (1.985 Å) [8] and schiff bases of 1-hydroxy-2-acetonaphthone palladium complexes (1.973-2.061 Å) [9]. The Pd1-N1 (2.019 Å) bond length is comparable to that in schiff bases of 1-hydroxy-2-acetonaphthone palladium complexes (2.010-2.019 Å), and is shorter than that in bis(phenoxyketimine) palladium complex (2.033 Å) and bis(imino)pyridine palladium complexes (2.04-2.06 Å) [10]. The angles of N1-Pd1-O1, N1-Pd1-Cl1, O1-Pd1-Cl2 and Cl1-Pd1-Cl2 are 91.03 (11), 94.28 (8) (Table 1).…”

“…Similarly, several bases were employed in Suzuki reactions (entries 6-9), K 2 CO 3 proving superior (entry 6). Further studies indicated that the catalytic activity could be reduced with lowering the reaction temperature (entries [10][11][12].…”

Green synthesis of fluorinated biaryl derivatives via thermoregulated ligand/palladium-catalyzed Suzuki reaction

“…Recently, Scheuermann and co-workers developed a palladium nanoparticle catalyst on graphite oxide, which showed excellent catalytic activity in the Suzuki reaction of 4-bromo-1,2-difluorobenzene with arylboronic acids [49]. However, the coupling reaction of 3,4-difluorophenylboronic acid with aryl bromide is rarely reported [23,24]. Therefore, the Suzuki reaction of 3,4-difluorophenylboronic acid was also investigated in this thermoregulated system.…”

“…However, this method is limited in applications due to harsh reaction conditions and low product yield. Recently, the synthesis of TFT-LCDs in organic solvent via path II was emerged [23,24]. However, to the best of our knowledge, there is no previous report of the efficient synthesis of fluorinated liquid crystals using the commercially available arylboronic acids in water.…”

“…Recently, the synthesis of fluorinated liquid crystals via the palladium-catalyzed Suzuki reaction of fluorinated arylboronic acids with aryl bromides containing cyclohexyl moiety in ethanol has been reported [23,24].…”