in acetonitrile T=65°C; 24 h; in a pressure bottle; Yield given;

Multi-step reaction with 2 steps 1: 81 percent / potassium superoxide / 18-crown-6 / dimethylsulfoxide; dimethylformamide; 1,2-dimethoxy-ethane / 6 h / Ambient temperature2: 100 percent / triethylamine / benzene / 2 h / Ambient temperature  

Multi-step reaction with 3 steps 1: 90 percent / 2,6-di-tert-butyl-4-methylpyridine / CH2Cl2 / 16 h / Heating2: 81 percent / potassium superoxide / 18-crown-6 / dimethylsulfoxide; dimethylformamide; 1,2-dimethoxy-ethane / 6 h / Ambient temperature3: 100 percent / triethylamine / benzene / 2 h / Ambient temperature  

Multi-step reaction with 2 steps 1: 90 percent / HCl gas / CHCl3; methanol / 0.75 h / Ambient temperature2: triethylamine / benzene / 2 h / Ambient temperature  

Multi-step reaction with 3 steps 1: 98 percent / sodium hydride / benzene / 12 h / Ambient temperature2: 100 percent / tetrabutylammonium fluoride / tetrahydrofuran / 2 h / Ambient temperature3: 100 percent / triethylamine / benzene / 2 h / Ambient temperature  

Multi-step reaction with 2 steps 1: 100 percent / tetrabutylammonium fluoride / tetrahydrofuran / 2 h / Ambient temperature2: 100 percent / triethylamine / benzene / 2 h / Ambient temperature