1: With tert.-butylnitrite in benzene Nitrosation; 2: in benzene T=0°C; Elimination; Photolysis; Further stages.;

in benzene Acetoxylation; radical Brook rearrangement; Heating; Title compound not separated from byproducts.;

in benzene Oxidation; Heating;

1.1: 91 percent / DMSO; oxalyl chloride; Et3N / CH2Cl2 / -78 °C 2.1: 94 percent / tetrahydrofuran; diethyl ether / -78 °C 3.1: t-BuONO / benzene 3.2: 77 percent / benzene / 0 °C / Photolysis View Scheme