literature-known and novel S-containing pincer-type ligands for ruthenium-catalyzed homogeneous hydrogenation and dehydrogenation reactions was carried out. The scope and limitations of these catalysts were carefully investigated, and it was shown that simple bench-stable SNS–Ru complexes can be used to facilitate the hydrogenation of a variety of different substrates at a maximum H2 pressure of 20 bar under operationally
Water-soluble SNS cationic palladium(II) complexes and their Suzuki–Miyaura cross-coupling reactions in aqueous medium
作者:Alphonse Fiebor、Richard Tia、Banothile C E Makhubela、Henok H Kinfe
DOI:10.3762/bjoc.14.160
日期:——
Unlike their SCS analogues, SNS pincer complexes are poorly studied for their use in couplingreactions. Accordingly, a series of watersoluble cationic Pd(II) SNS pincer complexes have been successfully synthesised and investigated in detail for their catalytic activity in Suzuki-Miyauracouplingreactions. By using only 0.5 mol % loading of the complexes, the coupling of inactivated aryl bromides and activated
Oxygenation of a benzyl ligand in SNS-palladium complexes with O<sub>2</sub>: acceleration by anions or Brønsted acids
作者:Reina Shimokawa、Yumi Kawada、Miki Hayashi、Yasutaka Kataoka、Yasuyuki Ura
DOI:10.1039/c6dt02948e
日期:——
n-Bu4NX or HX accelerated the oxygenation of an SNS-benzylpalladium complex, and the product selectivity was regulated primarily by a proton.
n-Bu4NX或HX加速了SNS-苄基钯配合物的氧化作用,并且产物选择性主要受质子调控。
Chloride-Modulated Insertion Reactions of Dimethylallene across the Pd−C Bond in Palladium Methyl Complexes Bearing Potentially Terdentate Pyridylthioether Ligands
作者:Luciano Canovese、Fabiano Visentin、Gavino Chessa、Paolo Uguagliati、Claudio Santo、Giuliano Bandoli、Lucia Maini
DOI:10.1021/om030293f
日期:2003.8.1
Palladium methyl complexes with potentiallyterdentate pyridylthioether (S−N−S(R) = 2,6-bis(R-thiomethyl)pyridine, R = Me, t-Bu, Ph; N−S−N = 2[(2-pyridylmethylthio)methyl]pyridine) ligands have been prepared and characterized. Both the bidentate chloride [Pd(Me)(S−N−S(R))]Cl and the terdentate chloride-free [Pd(Me)(S−N−S(R))]+ species are present in solution and display a substantially different reactivity
Attack of Substituted Alkynes on Olefin Palladium(0) Derivatives of Pyridylthioethers. The First Kinetic Study on the Mechanism of Formation of Palladacyclopentadiene Complexes
The formation of metallacyclopentadienyl derivatives was studied under controlled conditions, and the kinetics and mechanism of reactions between pyridylthioether olefin Pd(0) substrates and substituted alkynes of the type ZC⋮CZ (Z = COOMe, COOEt, COOt-Bu) leading to the corresponding palladacyclopentadienyl species were systematically investigated. In the case of less hindered ancillary ligands the