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New Journal of Chemistry
Page 7 of 8
DOI: 10.1039/C7NJ00063D
Journal Name
ARTICLE
11 Q. Zhao, C. Bai, W. Zhang, Y. Li, G. Zhang, F. Zhang, X.
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A mixture of aryl aldehydes (1 mmol), dimedone (0.14 g, 1
mmol), ethyl acetoacetate (0.13 g, 1 mmol), ammonium
acetate (0.077 g, 1 mmol) as a nitrogen source and
3
Adv., 2015,
13 F. Zhang, H. Jiang, X. Wu, Z. Mao and H. Li, ACS Appl.
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(0.007 g, 1.0 mol%) was stirred for the appropriate
reaction time at room temperature (Table 2). EtOAc (10
mL) was added to the reaction mixture and the catalyst
was separated by centrifugation. Evaporation of the
solvent under reduced pressure gave the crude products.
The pure products were isolated by chromatography on
silica gel eluted with n-hexane:EtOAc (4:1).
7
14 D. Doube, M. Bloun, C. Brideau, C. Chan, S. Desmarais,
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Synthesis of tris(hydroxymethyl)methylene ammonium
acetate supported on activated carbon (4)
Activated carbon (1 g) was mixed with concentrated HNO3
(40 mL) and stirred at 80 °C (2 h). Then, the mixture was
filtered, washed with EtOH (150 mL) and dried at 80 °C in
an oven. Then, tris(hydroxymethyl)methylene ammonium
acetate supported on activated carbon was synthesized
following the procedure, which we have used for the
17 J. L. Donelson, R. A. Gibbs and S. K. De, J. Mol. Catal. A:
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18 S. M. Vahdat, F. Chekin, M. Hatami, M. Khavarpour, S.
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758.
,
preparation of 3 35
.
19 S. J. Ji, Z. Q. Jiang, J. Lu and T. P. Loh, Synlett, 2004, 831.
20 S. Rostamnia, H. Xin, X. Liu and K. Lamei, J. Mol. Catal.
A: Chem., 2013, 374, 85.
Synthesis of trizma acetate (5)
A solution of tris(hydroxymethyl)aminomethane (25 mmol,
3.0 g) in water (8 mL) was added dropwise to HOAC (25
mmol, 1.5 g) and stirred at room temperature for 20 h.
After solvent evaporation, it was dried at 80 °C in oven
under vacuum to give a white solid.
21 S.Tang, G. A. Baker and H. Zhao, Chem. Soc. Rev., 2012,
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22 K. L. Luska, P. Migowskia and W. Leitner, Green, Chem.
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23 S. Sobhani and M. Honarmand, Catal. Lett., 2013, 143
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,
24 S. Sobhani and M. Honarmand, Appl. Catal., A, 2013,
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Acknowledgements
25 S. Sobhani and F. Zarifi, RSC Adv. 2015,
26 S. Sobhani, F. Zarifi and J. Skibsted, ChemistrySelect,
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27 M. Nasr-Esfahani, D. Elhamifar, T. Amadeh and B.
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28 A. Bamoniri and S. Fouladgar, RSC Adv., 2015,
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Financial support of this project by the University of Birjand
Research Council and the Iran National Science Foundation
(INSF) is acknowledged. We thank for access to the solid-state
NMR facilities at the Department of Chemistry, Aarhus
1
University
.
5
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Notes and references
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