Ruthenium Hydroxide on Titanium Oxide for Hydrogen-Transfer
Reduction

K. Yamaguchi; T. Koike; J. W. Kim; Y. Ogasawara; N. Mizuno

doi:10.1055/s-0028-1087734

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Synfacts 2009(3): 0350-0350
DOI: 10.1055/s-0028-1087734

Polymer-Supported Synthesis

Ruthenium Hydroxide on Titanium Oxide for Hydrogen-Transfer Reduction

Contributor(s): Yasuhiro Uozumi, Yoichi M. A. Yamada, Maki Minakawa
K. Yamaguchi, T. Koike, J. W. Kim, Y. Ogasawara, N. Mizuno*
The University of Tokyo, Japan

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Publikationsdatum:
19. Februar 2009 (online)

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Significance

The supported ruthenium hydroxide (Ru(OH)_x/TiO₂)-catalyzed hydrogen-transfer reactions with an alcohol as a hydrogen source were described. Reduction of carbonyl compounds with 2-propanol as a hydrogen donor in the presence of Ru(OH)_x/TiO₂ gave the corresponding alcohols (10 examples, 64-99% yield). Ru(OH)_x/TiO₂ catalyst was also effective for the reduction of allylic alcohols to saturated alcohols (6 examples, 76-98% yield). Furthermore, the chemoselective reduction of (R)-(+)-citronellal was achieved under similar reaction conditions (90% yield, >99% selectivity).