title: Stereoselective synthesis of pentacarbonyl(3-oxa-2-bicyclo[3.1.0]hexylidene)- and pentacarbonyl(cyclopropylmethoxymethylene)tungsten compounds on the route to cyclopropane-gamma-lactones and -carboxylates.
abstract: The diastereoselective synthesis of pentacarbonyl-3-oxa-2-bicyclo[3.1.0]hexylidene- and pentacarbonyl(cyclopropylmethoxymethylene)tungsten compounds 4 and 9 by the reaction of lithiated oxazolinyloxiranes 2 and 8 and Fischer carbene tungsten complexes 3 is described. A mechanism for the formation of 4 and 9 is reported as well as their oxidation to cyclopropane-gamma-lactone 13 and -carboxylate 14.
authors.affiliation: Dipartimento Farmaco-Chimico, Universitá di Bari, Via E. Orabona 4, I-70126-Bari, Italy. florio@farmchim.uniba.it
authors.forename: Saverio
authors.initials: S
authors.lastname: Florio
authors.forename: Filippo M
authors.initials: FM
authors.lastname: Perna
authors.forename: Renzo
authors.initials: R
authors.lastname: Luisi
authors.forename: José
authors.initials: J
authors.lastname: Barluenga
authors.forename: Francisco J
authors.initials: FJ
authors.lastname: Fañanás
authors.forename: Félix
authors.initials: F
authors.lastname: Rodríguez