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Synthesis of N-unsubstituted cyclic imides from anhydride with urea in deep eutectic solvent (DES) choline chloride/urea

Luxiao Liu, Hong-Yu Zhang, Guohui Yin, Yuecheng Zhang, and Jiquan Zhao

School of Chemical Engineering and Technology, Hebei Provincial Key Lab of Green Chemical Technology and High Efficient Energy Saving, Hebei University of Technology, Tianjin, People’s Republic of China

 

E-mail: yczhang@hebut.edu.cn

Received: 20 July 2019  Accepted: 19 October 2019

Abstract:

N-Unsubstituted cyclic imides were readily synthesized in deep eutectic solvent (DES) choline chloride (ChCl)/urea from anhydrides with urea. Urea serves as both a DES component and a nitrogen source, which endows the protocol with advantages of smooth reaction, easy separation of products, simple recovery and recycling of ChCl/urea.

Keywords: N-Unsubstituted cyclic imides; Deep eutectic solvent; Choline chloride/urea; Anhydrides

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-019-00969-6

 

Chemical Papers 74 (4) 1351–1357 (2020)

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