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Low melting sugar–urea–salt mixtures as solvents for organic reactions—estimation of polarity and use in catalysis

Imperato, Giovanni, Höger, Silke, Lenoir, Dieter, König, Burkhard·2006·Green Chem.
DOI 10.1039/b603660k
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Abstract

Mixtures of sugars, sugar alcohols or citric acid with urea and inorganic salts form stable melts if heated to 70 °C. The polarity of the melts was estimated using solvatochromic dyes and found to be in the range of DMF or water, depending on the sensitivity of the dye for hydrogen bonds. To explore the use of the melts as solvents in catalysis, Rh-catalyzed hydrogenations and Pd-catalyzed Suzuki reactions were performed. The hydrogenation of a double bond is sensitive to the composition of the melt, and no effect of the chiral melts on the stereochemical outcome of the reaction was observed. The Suzuki coupling proceeds rapidly, cleanly and quantitatively in all examined melts. The results recommend the non-toxic sugar–urea–salt melts as more sustainable reaction media for chemical transformations.

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Metadata

Authors
Imperato, G., Höger, S., Lenoir, D., & König, B.
Venue
Green Chem.
Publisher
Royal Society of Chemistry (RSC)
Published
2006
Volume
8
Issue
12
Pages
1051-1055
ISSN
  • 1463-9262 (ISSN-L)
  • 1463-9270
DOI
10.1039/b603660k
OpenAlex
W2166397952
Cited by
186
References
0
FWCI
1.03
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Low melting sugar–urea–salt mixtures as solvents for organic reactions—estimation of polarity and use in catalysis. https://app.cochat.ai/papers/10.1039/b603660k
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Imperato, G., Höger, S., Lenoir, D., & König, B. (2006). Low melting sugar–urea–salt mixtures as solvents for organic reactions—estimation of polarity and use in catalysis. Green Chem. https://doi.org/10.1039/b603660k

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