... Abstract. The synthesis of 12-hydroxy-2-oxa-6-azabicyclo[7.3.1.]trideca-1(13),9,11-trien- 5-one(4) is described. Two routes to (4) based on the photolysis of N-[2-(3,4- dimethoxyphenyl)ethyl]chloroacetamide (2b) and N-[2-(4-t-butyldimethylsiloxy ...