反应详情

A solution of 5.5 g. of 3,5-dinitro-2-pyridone in 200 ml. of methanol was adjusted to pH 8 with ammonium hydroxide. At 60°-65° C., there was added slowly a solution of 10.8 g. of sodium sulfide nonahydrate in 30 ml. of water. After 1 hour at 60°-65° C. the solvent was evaporated and the residue was extracted with hot benzene and acetic acid to neutralize any sodium salt. The benzene was decanted and cooled to give a precipitate. Recrystallization from methanol gave 3-amino-5-nitro-2-pyridone, m.p. 200°-201° C.

1. additionAt 60°-65° C., there was added slowly a solution of 10.8 g
2. customAfter 1 hour at 60°-65° C. the solvent was evaporated
3. extractionthe residue was extracted with hot benzene and acetic acid
4. customThe benzene was decanted
5. temperaturecooled
6. customto give a precipitate
7. customRecrystallization from methanol