反应详情

A solution of 1M BBr3 in dichloromethane (25.5 ml) was added dropwise to a stirred solution of 5-bromo-1-chloro-6-methoxyisoquinoline (1.26 g) in dichloromethane at 10° C. The mixture was stirred at ambient temperature for 48 h then poured into ice-water and the pH adjusted to 8 by adding concentrated aqueous ammonia. The mixture was extracted with ethyl acetate (x 2) and the aqueous phase then acidified to pH ˜4 using dilute hydrochloric acid. The aqueous phase was extracted with ethyl acetate (x 2), the combined organics were dried (Na2SO4) and concentrated in vacuo to give 5-bromo-1-chloro-6-hydroxyisoquinoline (1.1 g), El-MS: m/z=257.9, 260.0 and 261.6 [M+H]+.

1. extractionThe mixture was extracted with ethyl acetate (x 2)
2. extractionThe aqueous phase was extracted with ethyl acetate (x 2)
3. dry with materialthe combined organics were dried (Na2SO4)
4. concentrationconcentrated in vacuo