(m 2H), 3.65 (s 3H); 13C NMR (D2O d/ppm) = 140.0, 130.9,
129.6, 126.5, 126.1, 113.9, 112.1, 32.6; MS: m/z (+) 133.7, m/z
(À) 97.86; IR (KBr) (n cmÀ1) = 570, 750, 850, 1040, 1170,
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4.3 Dehydration reaction for fructose
In a typical reaction, a 50 ml round-bottom flask was charged
with fructose (1 g), ionic liquid (0.1 g) and DMSO (10 ml) and
heated at 80 1C in a water bath for 1 h. After reaction
completion, the sample was diluted with ultrapure water
before analysis. For the recycling of the IL, HMF was
extracted from the mixture with ethyl acetate (4 Â 10 ml).
After extraction, the IL was vaccum dried at 80 1C for 6 h.
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Acknowledgements
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The authors are thankful to Prof. V. K. Parmar, Mr Saumil V.
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DAK is thankful to UGC-Delhi for financial support in terms
of a meritorious fellowship.
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