M. Tajbakhsh et al.
samples. Cross-linked polyvinylpolypyrrolidone (Diver-
Ò
References
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3. Spivey AC, Arseniyadis S (2010) Top Curr Chem 291:233
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5
1
13
H, 100.6 MHz for C). Chemical shifts were on the d
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4
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triflate (PVPP.OTf)
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To a suspension of 3.0 g polyvinylpolypyrrolidone in
3
5 cm toluene, 2.0 g TfOH (13 mmol) was added. The
3
15. Bennardi DO, Romanelli GP, Autino JC, Pizzio LR (2009) Catal
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mixture was stirred magnetically for 60 min at r.t. The
solvent was removed under reduced pressure and the
residue was dried at 110 °C for 2 h to afford PVPP.OTf
1
1
1
1
6. Wang D, Dimonie VL, Sudol ED, El-Aasser MS (2002) J Appl
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?
as a white powder. The number of H sites of
PVPP.OTf was determined by acid–base titration to be
4
.3 mmol/g.
(
2006) Appl Catal 301:159
General experimental procedure
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To a mixture of substrate (1.0 mmol) and acetic anhydride
(
(
1.0 mmol), 0.008 g PVPP.OTf (3.4 mol%) was added.
2
The mixture was stirred at room temperature for the time
indicated in Tables 2, 3 and 4. The progress of the reaction
was followed by TLC or GC for aliphatic alcohols. After
2
2
3
completion of the reaction, ethyl acetate (2 9 10 cm ) was
2
5. Vahdat S, Khaksar S (2015) Res Chem Intermed 41:4177
added, and the catalyst was separated by filtration. The
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filtrate was washed with an aqueous solution of NaHCO
3
3
10%, 2 9 10 cm ) and water (2 9 10 cm ) and dried with
3
(
Na SO . The solvent was evaporated under reduced pres-
4
2
sure to afford the expected product. All the products are
known and their structures were identified by comparison
of the physical properties and spectral data with the
authentic samples or literature data.
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(
2
2013) J Mol Liquids 177:44
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Catal A Chem 332:152
Acknowledgements We are grateful to the University of Mazan-
daran for supporting our research.
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