A novel pyridinium salt photoelectrocyclization-nucleophilic bicyclic aziridine ring opening reaction sequence has been investigated in order to determine its preparative potential. N- Alkylpyridinium perchlorates were found to undergo photoinduced electrocyclization upon irradiation in nucleophilic solvents, such as H2O and MeOH, to efficiently produce 6-alkyl-6- azabicyclo [3.1. 0] hex-2-en-4-yl alcohols and ethers. The bicyclic aziridine photoproducts ...