Journal
TETRAHEDRON LETTERS
Volume 57, Issue 33, Pages 3785-3789Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2016.07.028
Keywords
Boronic acid; C-C-cross-coupling; Palladium acetate; Aqueous medium; Homogeneous catalysis
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Funding
- University Grant Commission (UGC) New Delhi
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Coumarin-based novel ligands (benzylidine-bis-(4-hydroxycoumarin)-diethylamines) were easily synthesized using 4-hydroxycoumarin, aromatic aldehydes, and diethylamine. The ionic ligand structure was established by X-ray study. They are air and moisture stable ligands and have shown highly efficient catalytic activity with Pd(OAc)(2) (0.1 mol% loading) in the Suzuki-Miyaura and (0.3 mol% loading) in the Mizoroki-Heck cross-coupling reactions in water or water/ethanol mixture. Pd-catalyst was reused efficiently without affecting variety of functional groups in the reaction. (C) 2016 Elsevier Ltd. All rights reserved.
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