Olefin-Stabilized Cobalt Nanoparticles for C=C, C=O, and C=N Hydrogenations.
Olefin-Stabilized Cobalt Nanoparticles for C=C, C=O, and C=N Hydrogenations.
复制标题
DOI:
10.1002/chem.201705366
复制
发表时间:
2018-03
期刊:
影响因子:
--
通讯作者:
Sebastian Sandl;F. Schwarzhuber;S. Pöllath;J. Zweck;A. Jacobi von Wangelin
中科院分区:
文献类型:
--
作者:
Sebastian Sandl;F. Schwarzhuber;S. Pöllath;J. Zweck;A. Jacobi von Wangelin
The development of cobalt catalysts that combine easy accessibility and high selectivity constitutes a promising approach to the replacement of noble-metal catalysts in hydrogenation reactions. This report introduces a user-friendly protocol that avoids complex ligands, hazardous reductants, special reaction conditions, and the formation of highly unstable pre-catalysts. Reduction of CoBr2 with LiEt3 BH in the presence of alkenes led to the formation of hydrogenation catalysts that effected clean conversions of alkenes, carbonyls, imines, and heteroarenes at mild conditions (3 mol % cat., 2-10 bar H2 , 20-80 °C). Poisoning studies and nanoparticle characterization by TEM, EDX, and DLS supported the notion of a heterotopic catalysis mechanism.