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ChemComm
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COMMUNICATION
Journal Name
5836.
the reactivities of aromatic ethers are higher than other aliphatic
cyclic ethers in the aerobic oxidation.
DOI: 10.1039/C9CC09480F
9
Chem. Sci., 2017, 8, 4489-4496.
In conclusion, the heterogeneous catalyst Au/CeO2 could catalyze
the selective catalytic oxidation of THF to GBL with O2 as oxidant
without any additives. Although the yields remain to be improved, a
satisfactory selectivity of GBL in 91.3 % has been achieved.
Preliminary mechanism studies showed that the oxygen vacancies
and Au on the surface of CeO2 contributed to the generation of
superoxide radicals and the interface between Au nanoparticles and
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Table 3 Au/CeO2-catalyzed aerobic C-H oxidation of different
ether substrates a
Entry
Substrate
Product
Yieldb(%)
O
O
O
1
13.7%
O
O
O
2
3
9.0%
O
O
26.2%
O
O
O
Rev., 2016, 116, 5987-6041.
O
4
5
49.3%
2.2%
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24 X. G. Liu, K. B. Zhou, L. Wang, B. Y. Wang and Y. D. Li, J. Am.
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O
O
O
25 H. L. Jia, A. X. Du, H. Zhang, J. H. Yang, R. B. Jiang, J. F. Wang
and C. Y. Zhang, J. Am. Chem. Soc., 2019, 141, 5083-5086.
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a
Reaction conditions: substrate (2 mL), catalyst (20 mg), T (100℃), t (6 h),
PO2(1MPa) and stirring speed (600 rpm). b Yield of product was determined by GC
with n-decane as internal standard.
27 J. W. Wan, W. X. Chen, C. Y. Jia, L. R. Zheng, J. C. Dong, X. S.
Zheng, Y. Wang, W. S. Yan, C. Chen, Q. Peng, D.S. Wang and Y.
D. Li, Adv. Mater., 2018, 30, 1705369.
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Buceta, E. Mendoza, G. Guilera and A. Mayoral, Nat. Chem., 2013,
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CeO2 support could adsorb THF and further activate C(sp3)-H bond,
thus achieving high selectivity of the desired product GBL. The
Au/CeO2 catalyst is also efficiently for selective oxidation of other
cyclic ethers into corresponding lactones. This work may provide
helpful insights into the design of the heterogeneous catalyst for
selective oxidation of other important oxygen-containing compounds.
29 H. Y. Tan, J.Wang, S. Z. Yu and K. B. Zhou, Environ. Sci.
Technol., 2015, 49, 8675-8682.
Acknowledgements
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This work was supported by the National Key Research and
Development Program of China (2018YFB0605801), Beijing
Municipal
Science
&
Technology
Commission
(Z181100004218004), National Natural Science Foundation of China
(21871277). Chinese Academy of Sciences (QYZDY-SSW-
SLH013).
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