Syntheses of d- and l-Cyclopentenone Derivatives Using Ring-Closing Metathesis:  Versatile Intermediates for the Synthesis of d- and l-Carbocyclic Nucleosides

Syntheses of d- and l-Cyclopentenone Derivatives Using Ring-Closing Metathesis:  Versatile Intermediates for the Synthesis of d- and l-Carbocyclic Nucleosides