Journal
CHEMISTRY-AN ASIAN JOURNAL
Volume 3, Issue 8-9, Pages 1390-1394Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asia.200800182
Keywords
diamine ligands; hydrogenations; imines; ruthenium
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Funding
- Swedish Research Council
- Wenner-Gren Foundations
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We previously reported the phosphine-free Cp*Ru(diamine)-catalyzed hydrogenation of aryl methyl ketones. Herein we present the first report of ruthenium-diamine-catalyzed imine hydrogenation to form amines. The most effective catalyst, I/KOtBu, completely converted several imines to amines at room temperature. The effect of electron-donating and -with- drawing groups on the reaction was investigated using a suitable series of substrates. The asymmetric version of the reaction was studied for two substrates, and the chiral amine products could be obtained in moderate enantiomeric excess.
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