Ultrasound-Assisted Green Synthesis of Dialkyl Peroxides under Phase-Transfer Catalysis Conditions

Molecules

Stefan Baj¹  Daniel Kopeć¹  Agnieszka Siewniak¹ 

[1] Department of Chemical Organic Technology and Petrochemistry, Silesian University of Technology, Krzywoustego 4, 44-100 Gliwice, Poland;

关键词: dialkyl peroxide;    ultrasound irradiation;    phase-transfer catalysis;    tri-liquid ptc system;    third-liquid phase;   

DOI  :  10.3390/molecules25010118

来源: DOAJ

【 摘 要 】

The dialkyl peroxides, which contain a thermally unstable oxygen−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 (70−99%) 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.

【 授权许可】

Unknown