☆ 4.5 Article

Palladium(II) tetrakis(4-N,N,N-trimethylammoniumphenylene) porphyrin supported on ion-exchange resins as efficient and reusable catalysts for C-C coupling reactions

JOURNAL OF ORGANOMETALLIC CHEMISTRY (2014)

期刊

JOURNAL OF ORGANOMETALLIC CHEMISTRY

卷 759, 期 -, 页码 46-57

出版社

ELSEVIER SCIENCE SA

DOI: 10.1016/j.jorganchem.2014.02.006

关键词

Palladium(II) porphyrin; Heterogeneous catalyst; Ion-exchange resins; C-C coupling reactions; Aryl halides

类别

Chemistry, Inorganic & Nuclear Chemistry, Organic

资金

Research Council of the University of Isfahan

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Protocol

Reagent

摘要

In this research, the Heck and Suzuki reactions catalyzed by tetrakis(4-N,N,N-trimethylammoniumphenylene)porphyrinatopalladium(II) iodide, [Pd(TTMAPP)]I-4, immobilized on ion-exchange resins such as Dowex 50 WX8 and Amberlite IR-120 are reported. In this manner, first, tetrakis(4-N,N-dimethylaminophenylene) porphyrin was converted to tetrakis(4-N,N,N-trimethylammoniumphenylene)porphyrin iodide, [H(2)TTMAPP]I-4, with methyl iodide. Then this water soluble porphyrin was metalated by palladium( II) chloride and the [Pd(TTMAPP)]I-4 was produced. This cationic palladium porphyrin was immobilized onto the ionic supports via electrostatic interactions. The catalysts, [Pd(TTMAPP)]@ Dowex 50 WX8 and [Pd(TTMAPP)]@Amberlit IR-120, were characterized by FT-IR and diffuse reflectance UV-Vis spectroscopic methods, and scanning electron microscopy. These heterogeneous catalysts are thermally stable, oxygen insensitive, phosphine-free, air- and moisture-stable in the C-C coupling reactions and are reusable several times without significant loss of their catalytic activity. (C) 2014 Elsevier B.V. All rights reserved.

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