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Basic Salt-Lake Brine: An Efficient Catalyst for the Transformation of CO2 into Quinazoline-2,4(1 H,3 H)-diones
Jiayin Hu1, Shangqing Chen1, Yafei Guo1
1Tianjin Key Laboratory of Marine Resources and Chemistry, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, No. 29, 13 Avenue, TEDA, Tianjin, P.R. China.
Abstract:
The efficient transformation of CO2 into value-added chemicals with green, abundant, and cheap catalysts is an interesting and challenging topic in both green and sustainable chemistry. In this study, a series of salt-lake brines were used for the first time to catalyze the reaction of CO2 and a broad range of 2-aminobenzonitriles to form the corresponding quinazoline-2,4(1 H,3 H)-diones. It was found that the abundant, available, and inexpensive Zhabuye basic salt-lake brine could efficiently promote the reaction of 2-aminobenzonitriles under low pressure of CO2 . Very high yields of value-added products were obtained. Further studies indicated that the basic carbonate and borate ions in the brine play key roles in accelerating the reactions.
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