Silica-Supported Cu Nanoparticle Catalysts for Alkyne Semihydrogenation: Effect of Ligands on Rates and Selectivity

Alexey Fedorov*, Hsuch-Ju Liu, Hung Kun Lo, Christophe Copéret

*Corresponding author for this work

Research output: Contribution to journalArticle

78 Scopus citations

Abstract

Narrowly dispersed, silica-supported Cu nanoparticles (ca. 2 nm) prepared via surface organometallic chemistry from a mesityl complex [Cu5Mes5] are highly active for the hydrogenation of a broad range of alkynes. High-throughput experimentation allows for identifying the optimal ligand and reaction conditions to turn these supported Cu nanoparticles into highly chemo- and stereoselective catalysts for the preparation of Z-olefins (overall, 23 examples). For instance, PCy3-modified Cu nanoparticles semihydrogenate 1-phenyl-1-propyne to cis-β-methylstyrene (20 bar H2, 40 °C) with turnover number and turnover frequency of ca. 540 and 1.9 min-1, respectively, and with 94% selectivity at full conversion.

Original languageEnglish
Pages (from-to)16502-16507
Number of pages6
JournalJournal of the American Chemical Society
Volume138
Issue number50
DOIs
StatePublished - 21 Dec 2016

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