反应详情

温度

130 °C

A mixture of 4-methoxy-3-nitro-6,7-dihydro-5H-cyclopenta[b]pyridine (1.535 g, 7.905 mmol) in AcOH (2.6 mL) was treated with 48% aq. HBr (2.6 mL, 23 mmol). The flask was sealed and heated at 130° C. for 40 min. then allowed to cool. The mixture was then concentrated under reduced pressure and the residue was neutralized to pH=7-8 using 50% NaOH in a cold bath. The mixture was then concentrated under reduced pressure and the residue was diluted with MeOH and THF, dried, filtered and concentrated to give the sub-title compound as a light brown powder. LCMS calc. for C8H9N2O3(M+H)+: m/z=181.3. Found: 181.2.

1. customThe flask was sealed
2. temperatureto cool
3. concentrationThe mixture was then concentrated under reduced pressure
4. concentrationThe mixture was then concentrated under reduced pressure
5. additionthe residue was diluted with MeOH and THF
6. customdried
7. filtrationfiltered
8. concentrationconcentrated