反应详情

温度

65 °C

1.5 equivalents of N-iodosuccinimide are added at room temperature to 5 g (32.7 mmol) of a methyl 3-aminopyrazine-2-carboxylate solution in 25 ml of dimethylformamide. The reaction medium is heated at 65° C. for 1 hour, added together with 0.5 equivalents of N-iodosuccinimide and maintained at 65° C. for 24 hours. After returning to room temperature, the solvent is evaporated and then the product is extracted several times with dichloromethane. The organic phases are combined, washed with 10% sodium bisulfite solution, dried on magnesium sulfate and concentrated to yield 8 g (88%) of methyl 3-amino-6-iodopyrazine-2-carboxylate in the form of a yellow solid.

1. temperaturemaintained at 65° C. for 24 hours
2. customAfter returning to room temperature
3. customthe solvent is evaporated
4. extractionthe product is extracted several times with dichloromethane
5. washwashed with 10% sodium bisulfite solution
6. customdried on magnesium sulfate
7. concentrationconcentrated