Conversion of one enantiomer of the carbocyclic nucleoside synthon 2-azabicyclo[2.2.1]hept-5-en-3-one into the other
Abstract
The lactam synthon 2-azabicyclo[2.2.1]hept-5-en-3-one was converted into its enantiomer by a 5-step sequence incorporating a skeletal rearrangement mediated by anchimeric assistance of the nitrogen atom; the route proceeded via a tosylate intermediate prone to racemization.