Interplays Between Reactions within and Without the Catalytic Cycle of the Heck Reaction as a Clue to the Optimization of the Synthetic Protocol

Schmidt, Alexander F.; Halaiqa, A. Al; Смирнов, В. В.

doi:10.1002/chin.200704274

Cited by 1 publication

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“…Activated carbon [Gruber, et al, 2004; [Altava, et al, 2006;Kaneda, et al, 1990;Wagner, et al, 2000]. Both palladium (0) and (II) can be used in this process [Yin and Liebscher, 2006], as it has been proved that there is a palladium (0) to (II) cycle during the catalytic process [Schmidt, et al, 2006]. Such a cycle between palladium (0) to (II), however, also significantly affects the palladium (0) aggregation and palladium (II) leakage in the reaction, which causes the rapid deactivation of the catalyst.…”

Section: Introductionmentioning

confidence: 99%

Novel Pd-BTP/SiO₂as an Effective Heterogeneous Catalyst for Heck Reactions

Wei

Thushara

Liu

et al. 2015

Chemical Engineering Communications

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A highly efficient and reusable catalyst, palladium (II) complex supported on functionalized silica, was prepared by anchoring palladium (II) onto 2,6-bis(5,6-dimethyl-1,2,4-triazine-3-yl)pyridine [BTP] modified mesoporous silica (labeled as Pd-BTP/SiO 2 ). The catalyst was characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared (FT-IR), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA) and BET analysis. Its catalytic performance was tested for the Heck coupling reactions between aryl halides with acrylic acid or styrene, and good to excellent results (higher conversions 87-96% and yields 66-78%) were obtained. The catalyst system was stable under the reaction conditions and could be successfully reused more than 5 times without the loss of catalytic activity. Chemical Engineering Communications2

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