Formation of Osmium− and Ruthenium−Cyclobutylidene Complexes by Ring Expansion of Alkylidenecyclopropanes
作者:Ruth Castro-Rodrigo、Miguel A. Esteruelas、Sara Fuertes、Ana M. López、Fernando López、José L. Mascareñas、Silvia Mozo、Enrique Oñate、Lucía Saya、Lara Villarino
DOI:10.1021/ja904893j
日期:2009.11.4
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 CH(2) group of the three-membered ring from an olefinic carbon atom to the other one. It takes place, without direct