Orthopalladacycles derived from α-diphenylhydrazonoketene dithioacetals and their reactivity with terminal alkynes

An expedient approach to enhance Mizoroki–Heck coupling reaction by infrared irradiation using palladacycle compounds

“…In the case of complexes 3a and 3b , they involve a similar coordination pattern, complex 3a being a more rigid system. These palladacycles are very stable and the ligands strongly coordinate to palladium atom as was previously demonstrated . We have compared the catalytic performance of complexes 2 and 3a under microwave irradiation using the same reaction conditions (Table , entries 7 and 8).…”

“…The palladacycle complexes 3a and 3b were synthesized following procedures in the literature . In the case of new palladacycle complex 2 , it was prepared by reaction between ligand 1 and Na 2 PdCl 4 generated in situ , to give an orange crystalline solid in 90% yield (Scheme ).…”

Palladium(II) Pincer Complexes Derived From N,N’,N’’‐Tris(2‐thioanisyl)guanidine. Syntheses, Structural Aspects, Solution Behaviour and Suzuki‐Miyaura Coupling Reactions

“…[13][14][15][16][17][18][19][20] The N atom in these pincer complexes was shown to be a part of an azo, [1,7,8,10,11] imino, [2][3][4][5][6]9,12,15,[18][19][20] amidino, [13,14] amino, [16] or iminophosphorane [17] functionalities. The ring size of the [Pd {k 2 (C,N)}] and [Pd{k 2 (N,S)}] units indicated as m and n in Figure 1 in these pincer complexes can be 5/5, [1][2][3][4][5][7][8][9][10][11][12]15,17] 5/6, [6,16] or 6/5. [13,14,[18][19][20] Chen and co-workers reported the CNS Pd(II) pincer complexes wherein the À N=CÀ N < ...…”

“…[21] Subsequently, we have isolated a cationic pincer complex [Pd{k 3 (C,N,O)}(MeCN)]BF 4 (III) derived from 2anisyl guanidine and this complex was fully characterized except by single crystal X-ray diffraction (SCXRD). [22] In 2021, we reported three classes of CNN [6,5] Pd(II) pincer complexes ligated by mononuclear guanidinate(1-), dinuclear guanidinate(1-)/guanidinate (2-) and mononuclear guanidinate(2-) ligands. The aforementioned complexes were fully characterized and further their catalytic utility in Suzuki-Miyaura coupling reactions involving sterically hindered substrates were explored.…”

“…CNS Pd(II) pincer complexes are known for their structural characteristics, [1–10] electronic property [11,12] and catalytic utility in C−C cross‐coupling reactions [13–20] . The N atom in these pincer complexes was shown to be a part of an azo, [1,7,8,10,11] imino, [2–6,9,12,15,18–20] amidino, [13,14] amino, [16] or iminophosphorane [17] functionalities.…”