lithium hydride in N,N-dimethyl-formamide T=140°C; 2.5 h;

Multi-step reaction with 4 steps 1: AlCl3 / CH2Cl2 2: CrO3 3: SOCl2 4: NH3  

Multi-step reaction with 6 steps 2: MCPBA3: AlCl3 / CH2Cl2 4: CrO3 5: SOCl2 6: NH3  

Multi-step reaction with 2 steps 1: 48 percent / potassium hydroxide / dimethylsulfoxide / 24 h / Ambient temperature; 1.) room temperature, 24 h; 90 -100 deg C, 1.5 h2: 74 percent / acetic acid, conc. sulphuric acid / 45 h / 50 °C