(CAAC)Pd(py) Catalysts Disproportionate to Pd(CAAC)2
© 2023 The Authors. Published by American Chemical Society.
| Veröffentlicht in: | Organometallics. - 1998. - 42(2023), 13 vom: 10. Juli, Seite 1567-1572 |
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| 1. Verfasser: | |
| Weitere Verfasser: | , , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2023
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| Zugriff auf das übergeordnete Werk: | Organometallics |
| Schlagworte: | Journal Article |
| Zusammenfassung: | © 2023 The Authors. Published by American Chemical Society. Palladium complexes with one N-heterocyclic carbene (NHC) and a pyridine ancillary ligand are powerful cross-coupling precatalysts. Herein, we report such complexes with a cyclic (alkyl)(amino)carbene (CAAC) ligand replacing the NHC. We find that the alleged reduced form, (CAAC)Pd(py), disproportionates to the (CAAC)2Pd0 complex and palladium nanoparticles. This notwithstanding, they are potent catalysts in the Buchwald-Hartwig amination with aryl chlorides under mild conditions (60 °C). In the presence of dioxygen, these complexes catalyze the formation of diazenes from anilines. The catalytic activities of the NHC- and CAAC-supported palladium(0) and palladium(II) complexes are similar in the cross-coupling reaction, yet the CAAC complexes are superior for diazene formation |
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| Beschreibung: | Date Revised 21.09.2024 published: Electronic-eCollection Citation Status PubMed-not-MEDLINE |
| ISSN: | 0276-7333 |
| DOI: | 10.1021/acs.organomet.3c00150 |