反应详情

A stirred solution of 2-methoxy-6-(3-pyridyl) quinoline (1.83 g) in 48% aqueous hydrobromic acid (6 cm3) was heated at 100° C. for 1.5 hours. The mixture was then cooled in an ice bath, adjusted with 5M sodium hydroxide solution to pH 8, and continuously extracted with chloroform for 6 hours. The dried (MgSO4) organic extract was then evaporated to give a solid which was recrystallised from methanol-ethyl acetate to afford 6-(3-pyridyl)-2-[1H]-quinolone, m.p. 217°-218°, (0.62 g).

1. temperatureThe mixture was then cooled in an ice bath
2. extractioncontinuously extracted with chloroform for 6 hours
3. dry with materialThe dried (MgSO4)
4. extractionorganic extract
5. customwas then evaporated
6. customto give a solid which
7. customwas recrystallised from methanol-ethyl acetate