Abstract
CuI accompanyied by Cs2CO3 and TBAB was confirmed to be an efficient catalyst combination to promote an Ullmann coupling reaction. It facilitated 2-bromobenzamides to undergo a coupling reaction for the synthesis of symmetrical biaryldiamides in moderate yields at 120 °C under Pd-free conditions.
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Acknowledgements
This work was financially supported by NSFC of China (No. 21702078), the NSF of Jiangsu Province (No. BK20170231), the Priority Academic Program Development of Jiangsu Higher education Institutions and TAPP.
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Dong, F., Liu, JQ. & Wang, XS. An efficient synthesis of biaryl diamides via Ullmann coupling reaction catalyzed by CuI in the presence of Cs2CO3 and TBAB. Res Chem Intermed 44, 5271–5283 (2018). https://doi.org/10.1007/s11164-018-3422-0
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DOI: https://doi.org/10.1007/s11164-018-3422-0