Well-defined air-stable palladium HASPO complexes for efficient Kumada-Corriu cross-couplings of (hetero)aryl or alkenyl tosylates |
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Authors: | Ackermann Lutz Kapdi Anant R Fenner Sabine Kornhaass Christoph Schulzke Carola |
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Affiliation: | 1. Institut für Organische und Biomolekulare Chemie, Georg‐August‐Universit?t, Tammannstrasse 2, 37077, G?ttingen (Germany), Fax: (+49)?551‐39‐6777;2. School of Chemistry, Trinity College Dublin, College Green, Dublin 2 (Ireland) |
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Abstract: | Palladium complexes of representative heteroatom-substituted secondary phosphine oxide (HASPO) preligands were synthesized and fully characterized, including X-ray crystal structure analysis. Importantly, these well-defined complexes served as highly efficient catalysts for Kumada-Corriu cross-coupling reactions of aryl, alkenyl, and even heteroaryl tosylates. Particularly, an air-stable catalyst derived from inexpensive PinP(O)H displayed a remarkably high catalytic efficacy, which resulted in cross-couplings at low catalyst loadings under exceedingly mild reaction conditions with ample scope. |
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Keywords: | catalysis cross‐coupling ligand palladium tosylate |
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