反应详情

To a solution of 2-bromonaphthalene (6.49 g, 31.3 mmol) in dry THF (50 ml) was added dropwise t-BuLi (18.4 ml of a 1.7 M solution in pentane) at −78° C. under nitrogen. After the mixture had been stirred for 30 min, 2-bromoanthraquinone (3.00 g, 10.4 mmol) was added at −78° C. The cooling bath was removed and the mixture was stirred for 2 hours at room temperature. The mixture was quenched with saturated aqueous ammonium chloride solution (50 ml) and extracted with ethyl ether (3×50 ml). The combined organic extracts were dried over MgSO4 and concentrated under vacuum. The crude product was slurried in petroleum ether, filtered off with suction, and washed with petroleum ether. After drying, the 2-bromo-9,10-di-naphthalene-2-yl-9,10-dihydro-anthracene-9,10-diol (5.30 g, 93%) was obtained.

1. customThe cooling bath was removed
2. stirringthe mixture was stirred for 2 hours at room temperature
3. customThe mixture was quenched with saturated aqueous ammonium chloride solution (50 ml)
4. extractionextracted with ethyl ether (3×50 ml)
5. dry with materialThe combined organic extracts were dried over MgSO4
6. concentrationconcentrated under vacuum
7. filtrationfiltered off with suction
8. washwashed with petroleum ether
9. customAfter drying