Generation of Tertiary Phosphine-Coordinated Pd(0) Species from Pd(OAc)<sub>2</sub>in the Catalytic Heck Reaction
作者:Fumiyuki Ozawa、Akihiko Kubo、Tamio Hayashi
DOI:10.1246/cl.1992.2177
日期:1992.11
2′-bis(diphenylphosphino)-1,1′-binaphthyl ((R)-BINAP) (3 equiv./Pd) in benzene in the presence of Et3N to give the palladium(0) species Pd[(R)-BINAP]2 (1 equiv./Pd), (R)-BINAP monoxide (1 equiv./Pd), and Et3N·HOAc (2 equiv./Pd). The progress of reaction strongly affected by the content of water in the reaction solution. The reduction of Pd(OAc)2 in the presence of PPh3 proceeded in a similar process to give Pd(PPh3)4
Can Palladium Acetate Lose Its “Saltiness”? Catalytic Activities of the Impurities in Palladium Acetate
作者:William A. Carole、Jonathan Bradley、Misbah Sarwar、Thomas J. Colacot
DOI:10.1021/acs.orglett.5b02835
日期:2015.11.6
Commercially available palladium acetate often contains two major impurities, whose presence can impact the overall catalytic efficacy. This systematic study provides a comparison of the differences in catalytic activity of pure palladium acetate, Pd-3(OAc)(6), with the two impurities: Pd-3(OAc)(6)(NO2) and polymeric [Pd(OAc)(2)](n) in a variety of cross-coupling reactions. The solid state C-13 NMR spectra of all three compounds in conjunction with DFT calculations confirm their reported geometries.