Working Paper Article Version 1 This version is not peer-reviewed

Green Synthesis of 2-Oxazolidinones by an Efficient and Recyclable CuBr/Ionic Liquid System via CO2, Propargylic alcohols, and 2-Aminoethanols

Version 1 : Received: 18 January 2021 / Approved: 18 January 2021 / Online: 18 January 2021 (12:40:17 CET)

A peer-reviewed article of this Preprint also exists.

Bu, C.; Gong, Y.; Du, M.; Chen, C.; Chaemchuen, S.; Hu, J.; Zhang, Y.; Díaz Velázquez, H.; Yuan, Y.; Verpoort, F. Green Synthesis of 2-Oxazolidinones by an Efficient and Recyclable CuBr/Ionic Liquid System via CO2, Propargylic Alcohols and 2-Aminoethanols. Catalysts 2021, 11, 233. Bu, C.; Gong, Y.; Du, M.; Chen, C.; Chaemchuen, S.; Hu, J.; Zhang, Y.; Díaz Velázquez, H.; Yuan, Y.; Verpoort, F. Green Synthesis of 2-Oxazolidinones by an Efficient and Recyclable CuBr/Ionic Liquid System via CO2, Propargylic Alcohols and 2-Aminoethanols. Catalysts 2021, 11, 233.

Journal reference: Catalysts 2021, 11, 233
DOI: 10.3390/catal11020233

Abstract

With the aim of profitable conversion of carbon dioxide (CO2) in an efficient, economical and sustainable manner, we developed a CuBr/ionic liquid (1-butyl-3-methylimidazolium acetate) catalytic system which could efficiently catalyze the three-component reactions of propargylic alcohols, 2-aminoethanols, and CO2 to produce 2-oxazolidinones and α-hydroxy ketones. Remarkably, this catalytic system employed lower metal loading (0.0125-0.5 mol%) but exhibited the highest turnover number (2960) ever reported, demonstrating its excellent activity and sustainability. Moreover, our catalytic system could efficiently work under 1 atm of CO2 pressure and recycle among the metal-catalyzed systems.

Subject Areas

Carbon dioxide chemistry; Copper catalysis; Synthetic methods; Multicomponent reaction; Cyclization

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