Synfacts 2009(4): 0453-0453  
DOI: 10.1055/s-0028-1087863
Polymer-Supported Synthesis
© Georg Thieme Verlag Stuttgart ˙ New York

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)


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.