X. Li et al.
Scheme 2 Reaction paths for
the tandem hydroformylation-
acetalization of olefns
4. Khan SR, Bhanage BM (2013) Tetrahedron Lett 54:5998
heterogeneous catalysts under mild condition. Compared
with the traditional routes, simplifed procedure with easy
catalyst/products separation can be achieved over the het-
erogeneous Rh-based catalysts. The experimental results
showed that a suitable Rh loading with appropriate reaction
temperature and reaction time was benefcial for the acetals
formation. 100% olefins conversion and a high acetals
selectivity of 94.6% can be obtained over 1Rh/SiO2 cata-
lyst under the optimal reaction conditions (120 °C and 8 h).
More importantly, the selectivity toward desired valuable
linear products was enhanced in this tandem catalysis com-
pared with the hydroformylation reaction alone. Based on
the mechanism study, highly dispersed RhOx nanoparticles
and surface acidic sites on the supports were responsible for
the hydroformylation and acetalization, respectively. Fur-
thermore, various corresponding acetals can be produced
with satisfactory yields when diferent olefns or alcohols
were used as substrates.
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Acknowledgements This work was supported by the Ministry of Sci-
ence and Technology of China (2017YFB0602202), Natural Science
Foundation of China (91945301), Key Research Program of Frontier
Sciences, CAS (Grant No. QYZDB-SSW-SLH035), and the “Transfor-
mational Technologies for Clean Energy and Demonstration”, Strategic
Priority Research Program of the Chinese Academy of Sciences (Grant
No. XDA21020600) and the Youth Innovation Promotion Association
of CAS.
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Compliance with Ethical Standards
24. Rodrigues C, Delolo FG, Norinder J, Börner A, Bogado AL,
Batista AA (2017) J Mol Catal A Chem 426:586
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YS, Maksimovb AL, Karakhanov EA (2018) Russ L Appl
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Conflict of interest The authors declare that they have no known com-
peting fnancial interests or personal relationships that could have ap-
peared to infuence the work reported in this paper.
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