Transfer Dehydrogenation with Alumina-Supported Ir Pincer
Complexes

Z. Huang; M. Brookhart; A. S. Goldman; S. Kundu; A. Ray; S. L. Scott; B. C. Vicente

doi:10.1055/s-0028-1087863

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Synfacts 2009(4): 0453-0453
DOI: 10.1055/s-0028-1087863

Polymer-Supported Synthesis

Transfer Dehydrogenation with Alumina-Supported Ir Pincer Complexes

Contributor(s): Yasuhiro Uozumi, Noboru Kobayashi
Z. Huang, M. Brookhart*, A. S. Goldman*, S. Kundu, A. Ray, S. L. Scott*, B. C. Vicente
University of North Carolina, Rutgers University, Piscataway, and University of California, Santa Barbara, USA

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Publication History

Publication Date:
23 March 2009 (online)

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Significance

Iridium pincer complexes 1 and 2 immobilized on Na₂O-modified γ-Al₂O₃ (1/Al₂O₃/Na₂O and 2/Al₂O₃/Na₂O) catalyzed the transfer of hydrogen from cyclooctane to 3,3-dimethyl-1-butene to give cyclooctene and 2,2-dimethylbutane. The catalysts could be recycled. Thus, TONs of the 1st reusing runs were 1520 and 940 for 1/Al₂O₃/Na₂O and 2/Al₂O₃/Na₂O, respectively. After the reaction with 1/Al₂O₃/Na₂O₃, ICP-MS analysis showed that 70 ppm of Ir was leached to the solution.