pyridine; oxalyl dichloride in benzene

1: 99 percent / ammonia, t-butyl alcohol, lithium / tetrahydrofuran / 0.17 h / -33 °C 2: 98 percent / ammonia, lithium / 0.25 h / -40 °C 3: 60 percent / iodine / CHCl3 / 1.5 h / 40 °C 4: pyridine, oxalyl chloride / benzene View Scheme

1: 60 percent / iodine / CHCl3 / 1.5 h / 40 °C 2: pyridine, oxalyl chloride / benzene View Scheme

1: 98 percent / ammonia, lithium / 0.25 h / -40 °C 2: 60 percent / iodine / CHCl3 / 1.5 h / 40 °C 3: pyridine, oxalyl chloride / benzene View Scheme