Journal of Organometallic Chemistry p. 29 - 36 (2018)
Update date:2022-07-29
Topics:
Neves, Patrícia
Nogueira, Lucie S.
Valente, Anabela A.
Pillinger, Martyn
Gon?alves, Isabel S.
Sampaio-Dias, Ivo E.
Sousa, Carlos A.D.
Rizzo-Aguiar, Fabio
Rodríguez-Borges, José E.
Tetracarbonylmolybdenum(0) complexes of the type cis-[Mo(CO)4(L)] containing chiral 7-(1-pyrindanyl) amine ligands were prepared and found to be effective precatalysts for the epoxidation of achiral (cis-cyclooctene) and prochiral (DL-limonene and trans-β-methylstyrene) olefins at 55 °C. Epoxides were the only products formed from cis-cyclooctene (100% yield) and trans-β-methylstyrene (100% selectivity at 82–85% conversion), and the main products formed from DL-limonene (80–82% 1,2-epoxide selectivity at 85% conversion). Characterization of recovered catalysts revealed that the precatalysts were transformed in situ to stable polyoxomolybdate salts containing the β-octamolybdate anion [β-Mo8O26]4?, which was responsible for the catalytic reaction.
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