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.
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.
Florio
Saverio
S
Dipartimento Farmaco-Chimico, Universitá di Bari, Via E. Orabona 4, I-70126-Bari, Italy. florio@farmchim.uniba.it
Perna
Filippo M
FM
Luisi
Renzo
R
Barluenga
José
J
Fañanás
Francisco J
FJ
Rodríguez
Félix
F