Formation of osmium- and ruthenium-cyclobutylidene complexes by ring expansion of alkylidenecyclopropanes
| Autor: | Enrique Oñate, Sara Fuertes, Miguel A. Esteruelas, José L. Mascareñas, Ana M. López, Ruth Castro-Rodrigo, Fernando López, Lucía Saya, Silvia Mozo, Lara Villarino |
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| Rok vydání: | 2009 |
| Předmět: |
Cyclobutylidene Complexes
Carbon atom chemistry.chemical_element Direct participation General Chemistry Ring (chemistry) Photochemistry Osmium Biochemistry Catalysis Ruthenium Metal Colloid and Surface Chemistry chemistry visual_art Alkylidenecyclopropanes Polymer chemistry visual_art.visual_art_medium Moiety Chelation |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| ISSN: | 1520-5126 |
| Popis: | Alkylidenecyclopropanes containing a chelation assistant at the terminal carbon atom of the olefinic moiety undergo an Os- or Ru-promoted ring expansion reaction to afford metal cyclobutylidene derivatives. The process occurs through a novel mechanism that implies a 1,2-migration of a CH2 group of the three-membered ring from an olefinic carbon atom to the other one. It takes place, without direct participation of the metal, on a metallaheterocyclopentene intermediate which is generated from an η2-methylenecyclopropane species stabilized by coordination of the chelation assistant. Financial support from the Spanish MICINN (Projects CTQ2008-00810, SAF2007-61015 and Consolider Ingenio 2010 (CSD2007-00006)), Diputacin General de Aragón (E35), and Xunta de Galicia (GRC2006/132). L.S. and L.B. thank MICINN and Xunta de Galicia for their grants. |
| Databáze: | OpenAIRE |
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