Abstract
A water-soluble palladium (II) complex containing an unsymmetrical Schiff-base ligand was synthesized and applied as catalyst Suzuki–Miyaura and Sonogashira cross-coupling reactions in aqueous media. Notably, moderate to excellent yields of biaryls were obtained in Suzuki reaction with usually less reactive aryl and heteroaryl chlorides under relatively mild condition. Moderate-to-high yields of aryl-alkynes were also obtained in Sonogashira reactions using aryl bromides. Apart from hydrophilic nature, the accomplishment of reactions in water, high recyclability, broad functional group tolerance, etc., are other advantages of the system.
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Acknowledgement
DST, New Delhi is gratefully acknowledged for financial support (Grant nos. 2015/000021 and CRG/2018/001669) and UGC, New Delhi for SAP-DRS programme. The authors also acknowledge the NMR Research Centre, IISc, Bangalore and SAIF, Punjab University, Chandigarh for NMR and ESI-MS analyses respectively.
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Puzari, A., Gogoi, A. & Das, P. An unsymmetrical Schiff-base derived recyclable Pd-catalyst for Suzuki–Miyaura and Sonogashira reactions in aqueous media. J Chem Sci 133, 56 (2021). https://doi.org/10.1007/s12039-021-01909-2
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DOI: https://doi.org/10.1007/s12039-021-01909-2