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- W2559531192 abstract "We report a regiodivergent hydrosilylation of alkenes catalyzed by catalysts generated in situ from bench-stable Co(acac)2 and phosphine- or nitrogen-based ligands. A wide range of vinylarenes and aliphatic alkenes reacted to afford either branched (45 examples) or linear (37 examples) organosilanes in high isolated yields (average: 84%) and high regioselectivities (from 91:9 to >99:1). This transformation tolerates a variety of functional groups including ether, silyloxy, thioether, epoxide, halogen, amine, ester, boronic ester, acetal, cyano, and ketone moieties. Mechanistic studies suggested that the hydrosilylation of alkenes catalyzed by the cobalt/bisphosphine system follows the Chalk–Harrod mechanism (with a Co–H intermediate), and the hydrosilylation of alkenes catalyzed by the cobalt/pyridine-2,6-diimine system follows the modified Chalk–Harrod mechanism (with a Co–Si intermediate). Systematic studies with sterically varied silanes revealed that the steric properties of silanes play a pivotal rol..." @default.
- W2559531192 created "2016-12-08" @default.
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- W2559531192 date "2016-12-23" @default.
- W2559531192 modified "2023-10-17" @default.
- W2559531192 title "Cobalt-Catalyzed Regiodivergent Hydrosilylation of Vinylarenes and Aliphatic Alkenes: Ligand- and Silane-Dependent Regioselectivities" @default.
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- W2559531192 doi "https://doi.org/10.1021/acscatal.6b02518" @default.
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