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Synfacts 2010(8): 0959-0959  
DOI: 10.1055/s-0030-1257795
Polymer-Supported Synthesis
© Georg Thieme Verlag Stuttgart ˙ New York

Direct Borylation of Arenes Catalyzed by γ-Fe2O3

Contributor(s): Yasuhiro Uozumi, Takao Osako
G. Yan, Y. Jiang, C. Kuang*, S. Wang, H. Liu, Y. Zhang, J. Wang*
Tongji University, Shanghai and Peking University, Beijing, P. R. of China
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Publikationsverlauf

Publikationsdatum:
22. Juli 2010 (online)

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Significance

γ-Fe2O3 magnetic nanoparticles (particle size 58 nm) catalyzed the borylation of arenes with bis(pinacolato)diborane in the presence of di-tert-butyl peroxide and potassium carbonate under air to give the corresponding borylated products in up to 75% yield (10 examples, eq. 1). A sequential reaction via γ-Fe2O3-catalyzed borylation of benzene and Suzuki-Miyaura coupling with iodoarenes gave the corresponding biaryls in up to 56% yield (4 examples, eq. 2).