in benzene 1 h; Heating;

1: hydrazoic acid, pyridine / diethyl ether; benzene / 1 h / -20 to 10 deg C 2: 66 percent / benzene / 1 h / Heating View Scheme

1: oxalyl chloride, pyridine / tetrahydrofuran / 1 h / Ambient temperature 2: hydrazoic acid, pyridine / diethyl ether; benzene / 1 h / -20 to 10 deg C 3: 66 percent / benzene / 1 h / Heating View Scheme

Heating;

potassium hydroxide in acetone Heating;