1,4-diaza-bicyclo[2.2.2]octane; p-NO2-benzenesulfonyl azide; formic acid; tert-butylhypochlorite; ascorbic acid powder 1.) DMF, 0 deg C, 2.) H2O, r.t., 1 h; Yield given. Multistep reaction;

hydrogenchloride; sodium hydroxide; sodium nitrite in water T=0°C; 7 h; further conditions: NaOCl, CH3COOH, r.t., 6 h;