1: thionyl chloride, DMF / 4 h / Heating 2: sodium azide / acetone; H2O / 0.5 h / 0 °C 3: 2.) 40percent aq. KOH / 1.) toluene, reflux, 1 h, 2.) toluene, reflux, 1 h View Scheme

1: sodium azide / acetone; H2O / 0.5 h / 0 °C 2: 2.) 40percent aq. KOH / 1.) toluene, reflux, 1 h, 2.) toluene, reflux, 1 h View Scheme

potassium hydroxide 1.) toluene, reflux, 1 h, 2.) toluene, reflux, 1 h; Yield given. Multistep reaction;