Microwave-assisted, rapid cycloaddition of allyl glycidyl ether and CO2 by employing pyridinium-based ionic liquid catalysts

• Microwave-assisted cycloaddition of epoxides and CO2 using pyridinium ionic liquids
• Cycloaddition reaction occurred over a short reaction time with high TOF.
• The effects of reaction parameters were investigated.
• Material usage and microwave cycloaddition make the process rapid and green.

This study investigated the use of pyridinium-based ionic liquids (ILs) as an efficient catalyst for the rapid solvent-free microwave-assisted cycloaddition of allyl glycidyl ether (AGE) and CO2 to yield allyl glycidyl carbonate (AGC) under moderate reaction conditions. The cycloaddition reaction occurred over a short reaction time of 30 s, resulting in a high turnover frequency (TOF) ranging from 200 to 7000 h− 1. The effects of alkyl chain length and anion of pyridinium-based catalysts on the cycloaddition reactivity were studied. The effects of reaction parameters such as the amount of catalyst, microwave power, CO2 pressure, and reaction time were also investigated.

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