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-γ-lactone 13 and -carboxylate 14.
Stereoselective Synthesis of Pentacarbonyl(3-oxa-2-bicyclo[3.1.0]hexylidene)- and Pentacarbonyl(cyclopropyl methoxymethylene)- tungsten compounds on the route to cyclopropane-gamma-lactones and -carboxylates
PERNA, FILIPPO;LUISI, Renzo;
2004-01-01
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-γ-lactone 13 and -carboxylate 14.File in questo prodotto:
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