反应详情

温度

-78 °C

Asolution of 5,6-dimethoxyindan-1-one (Compound 3a)(19 g, 0.094 mole) in 200 mL of methylene chloride was cooled at −78° C. with a dry-ice/iPrOH bath. To this solution was then added 200 mL (0.2 mole) of a 1 M solution of BBr3 in CH2Cl2 dropwise. The resulting solution was stirred at −78° C. for 1 hr and then at 0° C. for 1 hr. The solution was then cooled back to −78° C. with a dry-ice/iPrOH bath and quenched with 50 mL of MeOH. The solution was evaporated on a rotary evaporator to dryness, the solid was re-dissolved in MeOH and concentrated again for two more times. The red solid, the title compound, was used in subsequent reactions without further purification. MS m/z 165 (M+H)+.

1. waitat 0° C. for 1 hr
2. temperatureThe solution was then cooled back to −78° C. with a dry-ice/iPrOH bath
3. customquenched with 50 mL of MeOH
4. customThe solution was evaporated on a rotary evaporator to dryness
5. dissolutionthe solid was re-dissolved in MeOH
6. concentrationconcentrated again for two more times
7. customThe red solid, the title compound, was used in subsequent reactions without further purification