Journal
TETRAHEDRON LETTERS
Volume 49, Issue 52, Pages 7372-7375Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2008.10.054
Keywords
C-H insertion; Di-rhodium(II) complexes; N-heterocyclic carbenes (NHC); Axial coordination; Decarbonylation
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Funding
- Fundacao para a Ciencia e Tecnologia [POCI 2010]
- FEDER [POCI/QUI/60175/2004, POCI/QUI/58791/2004, PTDC/QUI/66695/2006, SFRH/BD/30619/2006]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/30619/2006, POCI/QUI/60175/2004, PTDC/QUI/66695/2006, POCI/QUI/58791/2004] Funding Source: FCT
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In this work we show that the intramolecular C-H insertion of diazo-acetamides catalysed by di-rhodium(II) complexes can be highly influenced by the axial ligand on the di-rhodium(II) complex. Axially monocoordinated NHC-Rh-2(OAc)(4) complexes have a distinct reactivity from the parent Rh-2(OAc)(4) complex affording the cyclisation products in different rates and selectivities. Surprisingly, a new reaction mode emerged when using these complexes which led to a decarbonylation pathway. (C) 2008 Elsevier Ltd. All rights reserved.
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