1: activated basic alumina / toluene / 0.42 h / -20 °C / other solvent 2: 81 percent / activated basic alumina / Ambient temperature View Scheme

1,4-diaza-bicyclo[2.2.2]octane; air; mercury 1.) THF, 12 h; Yield given. Multistep reaction. Yields of byproduct given;