Journal
CHEMCATCHEM
Volume 12, Issue 21, Pages 5359-5363Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.202000994
Keywords
chromium; hydrogenation; alkynes; stereoselectivity; nanoparticles
Categories
Funding
- Priority Program Materials Synthesis of the Deutsche Forschunggsgemeinschaft (DFG) [SPP 1708]
- Projekt DEAL
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Chromium complexes have found very little applications as hydrogenation catalysts. Here, we report a Cr-catalyzed semi-hydrogenation of internal alkynes to the correspondingZ-alkenes with good stereocontrol (up to 99/1 for dialkyl alkynes). The catalyst comprises the commercial reagents chromium(III) acetylacetonate, Cr(acac)(3), and diisobutylaluminium hydride, DIBAL-H, in THF. The semi-hydrogenation operates at mild conditions (1-5 bar H-2, 30 degrees C).
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