Activation and discovery of earth-abundant metal catalysts using sodium tert-butoxide
作者:Jamie H. Docherty、Jingying Peng、Andrew P. Dominey、Stephen P. Thomas
DOI:10.1038/nchem.2697
日期:2017.6
NaOtBu — an alkoxide salt — enables simple access to low-oxidation-state catalysis using sustainable first-row transition metals (Fe, Co, Mn, Ni). The approach works across a widerange of reductive alkene and alkyne functionlization reactions including hydroboration, hydrosilylation, hydrogenation, hydrovinylation and [2π+2π] cyclization reactions.
A simplemethod for the hydrosilylation of olefins by using air‐stable cobalt catalysts is developed. The catalyst system is composed of simple, cheap, and readily available cobalt(II) salts and well‐defined terpyridine derivatives as cocatalysts or ligands, and the hydrosilylation processes can be processed smoothly undermildconditions without either Grignard reagents or NaHBEt3 as activator.
A series of silylated triarylphosphines was synthesized. Hydrosilylation reactions of styrene with triethoxysilane catalyzed by RhCl3/silylated triarylphosphine complexes were investigated. The complexes RhCl3/phenylbis(4‐trimethylsilylphenyl)phosphine and RhCl3/tris(4‐trimethylsilylphenyl)phosphine exhibited higher activity as well as greater β‐adduct selectivity, and no unsaturated product was obtained
Effect of triarylphosphane ligands on the rhodium-catalyzed hydrosilylation of alkene
作者:Mei Xue、Jiayun Li、Jiajian Peng、Ying Bai、Guodong Zhang、Wenjun Xiao、Guoqiao Lai
DOI:10.1002/aoc.3092
日期:2014.2
functionalized triarylphosphaneligands are characterized by a very high catalytic effectiveness for the hydrosilylation of alkene. Among these catalysts tested, RhCl3/diphenyl(2‐(trimethylsilyl)phenyl)phosphane (8a) exhibited excellent catalytic properties. Using this silicon‐containing phosphane ligand for the rhodium‐catalyzed hydrosilylation of styrene, both higher conversion of alkene and higher β‐adduct