Preparation of NHC-substituted phosphitepalladacycles

New (κ2-C,N)-palladacyclic complexes with benzimidazol-2-ylidene ligand: Synthesis, crystal structures and characterization

“…In addition, the combination of a palladacycle framework with an NHC was reported by Herrmann [11][12][13], and others [14,15]. However, to the best of our knowledge, there have been only a few examples of spectroscopically characterized cyclometalated NHC-Pd(II) complexes reported [16,17].…”

“…1 H NMR chemical shifts were consistent with the proposed structures; the resonances for C2-hydrogens were observed as sharp singlet between 9.88 and 10.46 ppm. 13 C NMR of these salts showed the C2 carbon at 141.9-142.8 ppm. The benzylic protons appeared as singlet between 5.78 and 6.91 ppm.…”

Coordination Chemistry of an Unsymmetrical Naphthyridine‐Based Tetradentate Ligand toward Various Transition‐Metal Ions

“…Among various ligands designed for dinuclear systems, 2,7-disubstituted 1,8-naphthyridine-based ligands (L 1 -L 4 ) ( Figure 1) have been extensively employed in the construction of dimetallic complexes containing two metal ions within a short distance. [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] Indeed, ligand L 1 has been shown to form stable dirhodium [Rh-Rh 2.405(2) Å], [13] diruthenium [Ru-Ru 2.273(4) Å] [4] and dicopper [Cu-Cu 3.094 Å] complexes. [13c,16j] In addition, the metal ions are separated by 3.22 Å in the dinickel complex based on ligand L 2 , [16i] 2.9534(2) Å in the dicopper complex based on ligand L 3 , and 2.449(1)-2.7328(5) Å in the dicopper complexes based on ligand L 4 .…”

Application of dimeric orthopalladate complex of homoveratrylamine as an efficient catalyst in the Heck cross-coupling reaction

“…Palladacycles have been known over 30 years [3][4][5][6][7][8] and have acquired great interest due to their applications in many areas including organic synthesis [9][10][11][12], material science [13] and as biologically active compounds [14]. More recently, examples of their utility in homogeneous catalysis or as building blocks in macromolecular chemistry have also been published [15][16][17].…”

“…Vinylation of aryl halides, commonly called the Heck reaction [25][26][27], which was discovered in 1971 has become an excellent tool for the synthesis of elaborated styrene derivatives [28,29]. Phospha-palladacycles, first published by Shaw and co-workers [30], Mason and co-workers [4], Alyea et al [31] and Heck and co-workers [32] were investigated their application as excellent catalysts in C-C coupling reactions [33][34][35]. The air-moisture and thermal-stabilities of the catalysts have significant importance [36,37].…”