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Chemoselective hydrogenation of aromatic ketones with Pt-based heterogeneous catalysts. Substituent effects

Paper ID Volume ID Publish Year Pages File Format Full-Text
39328 45818 2015 8 PDF Available
Title
Chemoselective hydrogenation of aromatic ketones with Pt-based heterogeneous catalysts. Substituent effects
Abstract

•PtSn catalysts were obtained by a surface reaction between Pt and SnBu4.•PtSn systems have been active in the hydrogenation of aromatic ketones.•The substituents groups could influence in the adsorption mode of aromatic ketones.•PtSn catalysts lead to an increase in the selectivity to unsaturated alcohol.•Sn presence favors the interaction through CO, hindering the adsorption of ring.

Catalytic reduction of aromatic ketones is an interesting reaction that leads to the obtaining of alcohols. Some of these alcohols are employed as intermediaries to produce chemical fine compounds. The bimetallic catalysts are widely used in the chemoselective hydrogenation. The Surface Organometallic Chemistry on Metals (SOMC/M) is a methodology employed to obtain bimetallic systems.In the present work the hydrogenation of ketones derived from acetophenone has been studied. The aim was observe the effect on activity and selectivity to aromatic alcohols by the presence of substituents in the ring. The chemical characteristics of substituents groups could influence the way aromatic ketones are absorbed on the metallic surface. This fact can be explained by a combination of geometric and electronic effects.

Graphical abstractAdsorption modes of aromatic ketones on Pt surface.Figure optionsDownload full-size imageDownload high-quality image (128 K)Download as PowerPoint slide

Keywords
Aromatic ketones; Bimetallic catalysts; PtSn; Surface Organometallic Chemistry of Metals
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Chemoselective hydrogenation of aromatic ketones with Pt-based heterogeneous catalysts. Substituent effects
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 491, 5 February 2015, Pages 70–77
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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