Catalytic hydrogenolysis of aromatic ketones by a sol–gel entrapped combined Pd-[Rh(cod)Cl]2 catalyst

Add time:07/16/2019    Source:sciencedirect.com

Co-entrapment of palladium nanoparticles and soluble [Rh(cod)(μ-Cl)]2 in a silica sol–gel matrix forms a catalyst that promotes exhaustive hydrogenation and hydrogenolysis of various aromatic ketones. While the hydrogenation of acetophenone may proceed by initial formation of α-phenylethanol followed by dehydration to styrene and further reduction of the olefinic and aromatic CC bonds, the reaction of benzophenone and related compounds does not involve the intermediary of a carbinol. The immobilized combined catalyst is leach-proof and perfectly recyclable in at least five consecutive runs. Its unique catalytic activity is attributed to a synergistic effect between the different metal atoms.

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