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Synfacts 2019; 15(04): 0406
DOI: 10.1055/s-0037-1612394
Polymer-Supported Synthesis
© Georg Thieme Verlag Stuttgart · New York

Selective Catalytic Hydrogenation of α,β-Unsaturated Aldehydes

Rezensent(en):
Yasuhiro Uozumi
,
Aya Tazawa
Wang H, Bai S, Pi Y, Shao Q, Tan Y, Huang X. * Soochow University, Jiangsu and Hunan Normal University, Changsha, P. R. of China
A Strongly Coupled Ultrasmall Pt3Co Nanoparticle-Ultrathin Co(OH)2 Nanosheet Architecture Enhances Selective Hydrogenation of α,β-Unsaturated Aldehydes.

ACS Catal. 2019;
9: 154-159
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Publikationsverlauf

Publikationsdatum:
19. März 2019 (online)

 
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Key words

platinum catalysis - cobalt catalysis - hydrogenation - regioselectivity - enals - allylic alcohols

Significance

Pt3Co nanoparticles strongly grafted with Co(OH)2 nanosheet [Pt3Co@Co(OH)2-NS] were prepared by mixing Pt(acac)2, Co(acac)3, and Mo(CO)6 in MeOH–H2O–octylamine at 220 °C (eq.1). Pt3Co@Co(OH)2-NS catalyzed the selective hydrogenation of α,β-unsaturated aldehydes to give the corresponding allylic alcohols with ≤100% conversion and ≤100% selectivity (eq. 2; 5 examples).


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Comment

The catalyst was characterized by means of TEM, HRTEM, XRD, XPS, AFM, ATR-IR, and ICP-AES analyses. In the hydrogenation of cinnamaldehyde, the selectivity of Pt3Co@Co(OH)2-NS for the formation of cinnamyl alcohol was superior to that of the other Pt catalysts such as Pt nanoparticles (NPs), Pt3Co NPs, Pt NPs on Co(OH)2-NS, or Pt3Co NPs on Co(OH)2-NS. In the hydrogenation of cinnamaldehyde, the catalyst was recovered by centrifugation and reused nine times without loss of its activity. TEM images of the recovered catalyst after tenth run showed almost no changes.


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