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An improved bidentate complex of iridium as a catalyst for hydrogen isotope exchange

✍ Scribed by John M. Herbert; Andrew D. Kohler; Alan H. McNeill

Publisher: John Wiley and Sons
Year: 2005
Tongue: French
Weight: 128 KB
Volume: 48
Category: Article
ISSN: 0022-2135
DOI: 10.1002/jlcr.921

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✦ Synopsis

Iridium(I) complexes 1, containing bidentate phosphines, and 3, with arsine ligands, are generated in situ. These species mediate hydrogen isotope exchange in a variety of aromatic substrates including benzyl ketones. Although the catalytic activities of complexes 1 and 3 are generally unexceptional, a logical step leads to the use of ethylene-1,2-bis(diphenylarsine)iridium(I) tetrafluoroborate ( 5), which is an efficient catalyst for both aryl and benzyl ketones, and mediates exchange to a substantial extent in other substrates also.

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