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Communication
A Novel Pyridine-Bridged Bis-benzimidazolylidene Pincer Palladium Complex: Synthesis and Catalytic Properties
Article first published online: 10 JUL 2008
DOI: 10.1002/adsc.200800244
Copyright © 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Additional Information
How to Cite
Tu, T., Malineni, J. and Dötz, K. H. (2008), A Novel Pyridine-Bridged Bis-benzimidazolylidene Pincer Palladium Complex: Synthesis and Catalytic Properties. Adv. Synth. Catal., 350: 1791–1795. doi: 10.1002/adsc.200800244
Publication History
- Issue published online: 31 JUL 2008
- Article first published online: 10 JUL 2008
- Manuscript Revised: 9 JUN 2008
- Manuscript Received: 25 APR 2008
Funded by
- Alexander-von-Humboldt-Foundation
- Konrad-Adenauer Foundation
- DFG. Grant Number: SFB 624
- Abstract
- Article
- References
- Cited By
Keywords:
- benzimidazoles;
- carbenes;
- Heck reaction;
- palladium;
- Suzuki coupling
Abstract
A novel pyridine-bridged bis-benzimidazolylidene CNC pincer complex 1 was synthesized from cheap, commercially available precursors under microwave assistance in moderate yield. It catalyzes cross-coupling reactions of aryl halides with alkyl acrylates (Heck reaction) and phenylboronic acid (Suzuki reaction) under aerobic conditions with extremely high turn-over numbers (frequencies) indicating that a planar extension of the π-system by benzannelation significantly increases the catalytic activity even with trace amounts of catalyst loading.