Ultrasound-Assisted Green Synthesis of Dialkyl Peroxides under Phase-Transfer Catalysis Conditions
| Autor: | Stefan Baj, Daniel Kopeć, Agnieszka Siewniak |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Base (chemistry)
Pharmaceutical Science Liquid phase dialkyl peroxide Polyethylene glycol Ultrasound assisted Catalysis Article Analytical Chemistry Polyethylene Glycols lcsh:QD241-441 chemistry.chemical_compound lcsh:Organic chemistry Phase (matter) Drug Discovery Polymer chemistry Physical and Theoretical Chemistry Alkyl chemistry.chemical_classification Aqueous solution Chemistry Organic Chemistry Green Chemistry Technology Peroxides Ultrasonic Waves Chemistry (miscellaneous) ultrasound irradiation Molecular Medicine phase-transfer catalysis third-liquid phase tri-liquid PTC system |
| Zdroj: | Molecules Volume 25 Issue 1 Molecules, Vol 25, Iss 1, p 118 (2019) |
| ISSN: | 1420-3049 |
| DOI: | 10.3390/molecules25010118 |
| Popis: | The dialkyl peroxides, which contain a thermally unstable oxygen&ndash oxygen bond, are an important source of radical initiators and cross-linking agents. New efficient and green methods for their synthesis are still being sought. Herein, ultrasound-assisted synthesis of dialkyl peroxides from alkyl hydroperoxides and alkyl bromides in the presence of an aqueous solution of an inorganic base was systematically studied under phase-transfer catalysis (PTC) conditions. The process run in a tri-liquid system in which polyethylene glycol as a phase-transfer catalyst formed a third liquid phase between the organic and inorganic phases. The use of ultrasound provided high yields of organic peroxides (70&ndash 99%) in significantly shorter reaction times (1.5 h) in comparison to reaction with magnetic stirring (5.0 h). In turn, conducting the reaction in the tri-liquid PTC system allowed easy separation of the catalyst and its multiple use without significant loss of activity. |
| Databáze: | OpenAIRE |
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