反应详情

To a solution of 4-methyl-5-nitro-2-pyridinamine (12 g, 78.35 mmol) in diiodomethane (100 mL) was added isoamyl nitrite (22 mL, 160.4 mmol) at rt. After stirring for 30 min, the reaction was kept at 80° C. for 2 hr. The reaction was cooled and concentrated; but most of the diiodomethane remained. The crude mixture was loaded into column directly and eluted with 10% of EtOAc in hexane, and 2-iodo-4-methyl-5-nitropyridine (5.7 g, 28%) was obtained as a yellow solid after the removal of solvents under reduced pressure.

1. waitthe reaction was kept at 80° C. for 2 hr
2. temperatureThe reaction was cooled
3. concentrationconcentrated
4. washeluted with 10% of EtOAc in hexane