Development of recyclable iridium catalyst for C-H borylation |
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| Authors: | Tsuyoshi Tagata Mayumi Nishida |
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| Affiliation: | a Graduate School of Pharmaceutical Sciences, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
b Koei Chemical Company, Ltd., 25, Kitasode, Sodegaura, Chiba 299-0266, Japan |
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| Abstract: | Aromatic C-H borylation using [IrCl(COD)]2 and 2,2′-bipyridinedicarboxylic acids was studied. 2,2′-Bipyridine-4,4′-dicarboxylic acid was complexed with [IrCl(COD)]2 in the presence of bis(pinacolato)diboron. The resulting iridium catalyst could be readily separated from the reaction mixture by simple filtration, and the recovered catalyst under a nitrogen atmosphere was still active and could be reused more than 10 times. |
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