期刊
CHEMSUSCHEM
卷 12, 期 16, 页码 3864-3870出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201900926
关键词
alkynes; hydrogenation; iron; nanoparticles; stereoselectivity
资金
- Priority Program Materials synthesis at room temperature of the Deutsche Forschungsgemeinschaft (DFG) [SPP 1708]
The stereoselective hydrogenation of alkynes constitutes one of the key approaches for the construction of stereodefined alkenes. The majority of conventional methods utilize noble and toxic metal catalysts. This study concerns a simple catalyst comprised of the commercial chemicals iron(II) acetylacetonate and diisobutylaluminum hydride, which enables the Z-selective semihydrogenation of alkynes under near ambient conditions (1-3 bar H-2, 30 degrees C, 5 mol % [Fe]). Neither an elaborate catalyst preparation nor addition of ligands is required. Mechanistic studies (kinetic poisoning, X-ray absorption spectroscopy, TEM) strongly indicate the operation of small iron clusters and particle catalysts.
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