Cf. Palmer et R. Mccague, CONVERSION OF ONE ENANTIOMER OF THE CARBOCYCLIC NUCLEOSIDE SYNTHON 2-AZABICYCLO[2.2.1]HEPT-5-EN-3-ONE INTO THE OTHER, Journal of the Chemical Society. Perkin transactions. I, (10), 1995, pp. 1201-1203
The lactam synthon 2-azabicyclo[2.2.1]hept-5-en-3-one was converted in
to its enantiomer by a 5-step sequence incorporating a skeletal rearra
ngement mediated by anchimeric assistance of the nitrogen atom; the ro
ute proceeded via a tosylate intermediate prone to racemization.