Sucrose tricarboxylate by sonocatalysed TEMPO-mediated oxidation
| Autor: | Gérard Descotes, Sandrine Lemoine, Yves Queneau, Alain Bouchu, Stéphane Trombotto, David Joannard, Cecile Thomazeau |
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| Rok vydání: | 2000 |
| Předmět: |
Bromides
Sucrose Molecular Structure Sodium Hypochlorite Sonication Organic Chemistry Inorganic chemistry Nitrosonium ion Tricarboxylic Acids General Medicine Sodium Compounds Biochemistry Tricarboxylate Antioxidants Catalysis Analytical Chemistry Cyclic N-Oxides Sodium bromide chemistry.chemical_compound Catalytic cycle chemistry Ultrasonics Oxidation-Reduction |
| Zdroj: | Carbohydrate Research. 326:176-184 |
| ISSN: | 0008-6215 |
| Popis: | Oxidation of sucrose by the NaOCl/TEMPO system provided sucrose tricarboxylate without the addition of sodium bromide as co-catalyst when high-frequency (500 kHz) ultrasound was applied, in contrast to very limited conversion without sonication. In the presence of sodium bromide, sonication also caused acceleration of the oxidation. The rate increase due to sonication of the oxidant system prior to sucrose addition suggests that ultrasound acts at the level of the formation of the nitrosonium ion, the active oxidising species in the catalytic cycle. |
| Databáze: | OpenAIRE |
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