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Formation of osmium− and ruthenium−cyclobutylidene complexes by ring expansion of alkylidenecyclopropanes

AuthorsCastro-Rodrigo, Ruth ; Esteruelas, Miguel A. ; Fuertes, Sara ; López, Ana M. ; López, Fernando; Mascareñas, José L. ; Mozo, Silvia; Oñate, Enrique ; Saya, Lucía; Villarino, Lara
Cyclobutylidene Complexes
Issue Date9-Oct-2009
PublisherAmerican Chemical Society
CitationJournal of the American Chemical Society 131(43): 15572-15573 (2009)
AbstractAlkylidenecyclopropanes 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.
Publisher version (URL)http://dx.doi.org/10.1021/ja904893j
Appears in Collections:(IQOG) Artículos
(ICMA) Artículos
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