Single component cationic palladium proinitiators for the latent polymerization of cycloolefins
申请人:Bell Andrew
公开号:US20050187398A1
公开(公告)日:2005-08-25
Palladium compound compositions are provided in accordance with Formulae [((R)
3
E)
a
Pd(Q)(LB)
b
]
p
[WCA]
r
, where ((R)
3
E) is a Group 15 electron donor ligand, Q is an anionic ligand, LB is a Lewis base, WCA is a weakly coordinating anion, a is 1, 2 or 3, b is 0, 1 or 2, the sum of a and b is 1, 2 or 3 and each of p and r is an integer such that the molecular charge is zero, or [(E(R)
3
)(E(R)
2
R*)Pd(LB)]
p
[WCA]
r
where E(R)
2
R* represents a Group 15 neutral electron donor ligand and where R* is an anionic hydrocarbyl containing moiety, bonded to the Pd and having a β hydrogen with respect to the Pd center. Such compound composition exhibits latent polymerization activity in the presence of polycyclic olefins.
Mono- and polynuclear complexes from the reaction of palladium acetate with α-substituted thioethers and thiols
作者:Marino Basato、Diego Tommasi、Marco Zecca
DOI:10.1016/s0022-328x(98)00910-3
日期:1998.11
trimers decreases with the steric hindrance of the substituents at the sulphur and at the methine carbon atoms. Stable mixed sphere complexes are obtained also with carboxylato ligands different from acetato as PhCOO− and MeSCH2COO−. When the substituted thioether has poor electronwithdrawing groups, its reaction with palladium acetate affords complexes of the type [Pd(η1-OAc)2(RSCH2Z)2], in which the sulphur
Synthesis of novel binuclear palladiumthallium carboxylates of the type PdTI(O2CR)5 and their structural characterization based on observation of J(203, 205Tl1H and J(203, 205Tl13C)
作者:Antonius F.M.J. Van Der Ploeg、Gerard Van Koten、Kees Vrieze
DOI:10.1016/s0020-1693(00)91969-8
日期:1980.1
unit. On the basis of }1H and }1}3 C NMR spectra, which reveal coupling of the thallium nucleus with the respective carbon and hydrogen atoms, a structure is proposed which contains four carboxylato ligands bridging the PdTl unit and one apical ligand bonded to thallium. This structure does not involve a direct Pd-to-Tl bond. The dynamic }1H and }1}3C NMR spectra show in solution the occurrence
Modular Synthesis of Multisubstituted Furans through Palladium-Catalyzed Three-Component Condensation of Alkynylbenziodoxoles, Carboxylic Acids, and Imines
作者:Junliang Wu、Naohiko Yoshikai
DOI:10.1002/anie.201504687
日期:2015.9.14
regiocontrolled synthesis of a multisubstitutedfuran is achieved through Pd(OAc)2‐catalyzed room‐temperature condensation of an alkynylbenziodoxole, a carboxylicacid, and an enolizable ketimine, which contribute to C1, CO, and C2 fragments, respectively, to the furan skeleton. The reaction tolerates a broad range of functional groups in each of the reaction components, and enables highly modular and flexible
Thermodynamic–Kinetic Comparison of Palladium(II)-Mediated Alcohol and Hydroquinone Oxidation
作者:David L. Bruns、Shannon S. Stahl
DOI:10.1021/acs.organomet.2c00017
日期:2022.11.28
(4FBnOH), mediated by (bc)Pd(OAc)2 (bc = bathocuproine). Although alcoholoxidation is thermodynamically favored over H2Q oxidation by more than 400 mV, the oxidation of tBuH2Q proceeds several orders of magnitude faster than 4FBnOH oxidation. Kinetic and mechanistic studies reveal that these reactions feature different rate-limiting steps. Alcoholoxidation proceeds via rate-limiting β-hydride elimination