Enantiospecific Syntheses of Aristeromycin and Neplanocin A

Article abstract of DOI:10.1021/jo00302a043

The carbocylic nucleosides (-)-aristeromycin and (-)-neplanocin A were made enantiospecifically in nine steps and ten steps, respectively, from D-ribonic acid γ-lactone.Quenching of an organocuprate conjugate addition reaction with either acetic acid or methanesulfinyl chloride determines whether the divergent synthetic route branches toward (-)-aristeromycin or (-)-neplanocin A.An alternate synthesis of cyclopentenone 1, a common intermediate to these compounds, from D-gulonic acid γ-lactone is also described.