- Synthesis of monocarbenepalladium(0) complexes and their catalytic behavior in cross-coupling reactions of aryldiazonium salts
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The first monocarbenepalladium(0) complexes with benzoquinone and naphthoquinone as additional ligands have been prepared. As demonstrated by NMR spectroscopy and X-ray analysis, the complexes show a unique coordination mode giving quinone-bridged dimers. The monocarbenepalladium(0) complexes allow efficient cross-coupling reactions of aryldiazonium salts with olefins (Heck reaction) and arylboronic acids (Suzuki reaction).
- Selvakumar, Kumaravel,Zapf, Alexander,Spannenberg, Anke,Beller, Matthias
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- Synthesis of Bidentate Nitrogen Ligands by Rh-Catalyzed C-H Annulation and Their Application to Pd-Catalyzed Aerobic C-H Alkenylation
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A new class of bidentate ligands was prepared by a modular approach involving Rh-catalyzed C-H annulation reactions. The resulting conformationally constrained ligands enabled the Pd-catalyzed C-H alkenylation at electron-rich and sterically less hindered positions of electron-rich arenes while promoting the facile oxidation of Pd(0) intermediates by oxygen. This newly introduced ligand class is complementary to the ligands developed for Pd-catalyzed oxidative reactions and may find broad application in transition-metal-catalyzed reactions.
- Kim, Hyun Tae,Kang, Eunsu,Kim, Minkyu,Joo, Jung Min
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supporting information
p. 3657 - 3662
(2021/05/10)
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- Para-Selective C-H Olefination of Aniline Derivatives via Pd/S,O-Ligand Catalysis
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Herein we report a highly para-selective C-H olefination of aniline derivatives by a Pd/S,O-ligand-based catalyst. The reaction proceeds under mild reaction conditions with high efficiency and broad substrate scope, including mono-, di-, and trisubstituted tertiary, secondary, and primary anilines. The S,O-ligand is responsible for the dramatic improvements in substrate scope and the high para-selectivity observed. This methodology is operationally simple, scalable, and can be performed under aerobic conditions.
- Naksomboon, Kananat,Poater, Jordi,Bickelhaupt, F. Matthias,Fernández-Ibá?ez, M. ángeles
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supporting information
p. 6719 - 6725
(2019/05/06)
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- IMPROVED SYNTHESIS OF TRANS-4-DIETHYLAMINOCINNAMALDEHYDE
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The title compound was prepared from diisobutylaluminum hydride reduction of 4-diethylaminocinnamonitrile, which in turn was obtained by condensing 4-diethylaminobenzaldehyde and cyanoacetic acid.
- Chao, Herbert S.-I.
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p. 1641 - 1650
(2007/10/02)
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