Tandem Hydroformylation/Hydrogenation
of Alkenes to
Normal Alcohols Using Rh/Ru Dual Catalyst or Ru Single Component Catalyst
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Abstract
The catalyst system for tandem hydroformylation/hydrogenation
of
terminal alkenes to the corresponding homologated normal alcohol was
developed. The reaction mechanism for the Rh/Ru dual catalyst was
investigated by real-time IR monitoring experiments and <sup>31</sup>P NMR spectroscopy, which proved the mutual orthogonality of Rh-catalyzed
hydroformylation and Ru-catalyzed hydrogenation. Detailed investigation
about Ru-catalyzed hydrogenation of undecanal under H<sub>2</sub>/CO
pressure clarified different kinetics from the hydrogenation under
H<sub>2</sub> and gave a clue to design more active hydrogenation
catalysts under H<sub>2</sub>/CO atmosphere. The solely Ru-catalyzed
normal selective hydroformylation/hydrogenation is also reported