hydrogenchloride in water 7 h; Reflux;

Multi-step reaction with 5 steps 1: ethanol / 16 h / 0 - 20 °C2: N-bromosuccinmide / N,N-dimethyl-formamide / 48 h / 20 °C3: sulfuric acid / formic acid / 8 h / 20 °C4: acetic acid / toluene; methanol / 3 h / Reflux5: anhydrous potassium trimethylsilanolate / ethylene glycol dimethyl ether / 2 h / 20 - 60 °C  

Multi-step reaction with 2 steps 1: sodium hydride / mineral oil; tetrahydrofuran / 5 h / |Reflux2: hydrogenchloride / water / 0.5 h / 0 °C / |Cooling with ice